Patent Publication Number: US-2023140452-A1

Title: Folding Exercise Rack System

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
     The present application is a continuation of U.S. application Ser. No. 17/519,148 filed on Nov. 4, 2021 which issues as U.S. Pat. No. 11,446,535 on Sep. 20, 2022 (Docket No. PRXP-074). Each of the aforementioned patent applications is herein incorporated by reference in theft entirety. 
    
    
     STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT 
     Not applicable to this application. 
     BACKGROUND 
     The described example embodiments in general relate to exercise racks which may be both adjusted with respect to a wall and adjusted between a folded position for storage and an extended position for use. 
     More and more people are looking to stay fit, particularly during times of quarantine and self-isolation. While exercise studios have become ubiquitous in modern life, constraints such as time, distance of travel, and health crises have caused more and more people to seek out exercise equipment to use in their own homes. 
     Home exercise equipment is widely available, including various exercise racks, exercise bikes, rowing machines, reformers, and the like. However, such exercise equipment can require a lot of space and leave various structures which can create a mess and heighten the risk of injury, such as from a child tripping over weights or an exercise rack. Additionally, such exercise equipment can create a nuisance when not in use by taking up valuable space inside a home gym. For example, an exercise rack installed in a garage can leave little room for a vehicle or storage space. 
     While such exercise equipment is suitable for performing exercises, it would be far more preferable to utilize exercise equipment which may be easily folded into a compact state to allow for maximum use of a space when the exercise equipment is not in use. 
     SUMMARY 
     Some of the various embodiments of the present disclosure relate to a folding exercise rack system which includes an exercise rack that is both adjustable with respect to a wall and foldable between extended and retracted (e.g., folded, collapsed) positions. The exercise rack generally includes a pair of inner support members which are connected to a pair of outer support members by upper and lower arms. The pair of inner support members may be adjustable with respect to the wall between an extended position and a retracted position. The pair of outer support members may be adjustable between an extended position and a retracted (e.g., folded, collapsed) position. In the extended position, the outer support members are distally spaced away from the inner support members and wall. In the retracted position, the outer support members are positioned adjacent to the wall. 
     In a first exemplary embodiment, the exercise rack is adjustably connected to the wall by one or more brackets such that the exercise rack may be adjusted between an extended position in which the inner support members are distally spaced away from the wall and a retracted position in which the inner support members are positioned adjacent to the wall. The exercise rack is also adjustable between extended and retracted (e.g., folded, collapsed) positions. In the extended position, the outer support members are distally spaced away from the wall. In the retracted position, the outer support members are collapsed or folded inwardly to be adjacent to the wall. 
     In a second exemplary embodiment, the exercise rack is fixed in position on the wall but is collapsible or foldable in on itself. The exercise rack may thus be adjusted between an extended position and a retracted (e.g., folded, collapsed) position. Linkages which are connected to the inner support members are pivotably connected to corresponding hinges that are secured to the wall. The inner support members and interconnected frames may thus be pivoted inwardly towards the wall into the retracted position, or outwardly away from the wall into the extended position. 
     In a third exemplary embodiment, the exercise rack is adjustably connected to the wall by one or more brackets such that the exercise rack may be adjusted between an extended position in which the inner support members are distally spaced away from the wall and a retracted position in which the inner support members are positioned adjacent to the wall. The exercise rack is also adjustable between extended and retracted (e.g., folded, collapsed) positions. In the extended position, the outer support members are distally spaced away from the wall. In the retracted position, the outer support members are collapsed or folded inwardly to be adjacent to the wall. 
     In a fourth exemplary embodiment, the exercise rack is adjustably connected to the wall by a plurality of scissor connectors such that the exercise rack may be adjusted between an extended position in which the inner support members are distally spaced away from the wall and a retracted position in which the inner support members are positioned adjacent to the wall. The exercise rack is also adjustable between extended and retracted (e.g., folded, collapsed) positions in the same manner as the third exemplary embodiment. 
     There has thus been outlined, rather broadly, some of the embodiments of the present disclosure in order that the detailed description thereof may be better understood, and in order that the present contribution to the art may be better appreciated. There are additional embodiments of that will be described hereinafter and that will form the subject matter of the claims appended hereto. In this respect, before explaining at least one embodiment in detail, it is to be understood that the various embodiments are not limited in its application to the details of construction or to the arrangements of the components set forth in the following description or illustrated in the drawings. Also, it is to be understood that the phraseology and terminology employed herein are for the purpose of the description and should not be regarded as limiting. 
     To better understand the nature and advantages of the present disclosure, reference should be made to the following description and the accompanying figures. It is to be understood, however, that each of the figures is provided for the purpose of illustration only and is not intended as a definition of the limits of the scope of the present disclosure. Also, as a general rule, and unless it is evidence to the contrary from the description, where elements in different FIGS. use identical reference numbers, the elements are generally either identical or at least similar in function or purpose. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG.  1    is a perspective view of a folding exercise rack system in an extended position in accordance with a first exemplary embodiment. 
         FIG.  2    is a front view of a folding exercise rack system in an extended position in accordance with a first exemplary embodiment. 
         FIG.  3    is a side view of a folding exercise rack system in an extended position in accordance with a first exemplary embodiment. 
         FIG.  4    is a top view of a folding exercise rack system in an extended position in accordance with a first exemplary embodiment. 
         FIG.  5    is a perspective view of a folding exercise rack system during adjustment between retracted and extended positions in accordance with a first exemplary embodiment. 
         FIG.  6    is a front view of a folding exercise rack system during adjustment between retracted and extended positions in accordance with a first exemplary embodiment. 
         FIG.  7    is a side view of a folding exercise rack system during adjustment between retracted and extended positions in accordance with a first exemplary embodiment. 
         FIG.  8    is a top view of a folding exercise rack system during adjustment between retracted and extended positions in accordance with a first exemplary embodiment. 
         FIG.  9    is a perspective view of a folding exercise rack system in a retracted position in accordance with a first exemplary embodiment. 
         FIG.  10    is a front view of a folding exercise rack system in a retracted position in accordance with a first exemplary embodiment. 
         FIG.  11    is a side view of a folding exercise rack system in a retracted position in accordance with a first exemplary embodiment. 
         FIG.  12    is a top view of a folding exercise rack system in a retracted position in accordance with a first exemplary embodiment. 
         FIG.  13    is a perspective view of a folding exercise rack system in an extended position in accordance with a second exemplary embodiment. 
         FIG.  14    is a front view of a folding exercise rack system in an extended position in accordance with a second exemplary embodiment. 
         FIG.  15    is a side view of a folding exercise rack system in an extended position in accordance with a second exemplary embodiment. 
         FIG.  16    is a top view of a folding exercise rack system in an extended position in accordance with a second exemplary embodiment. 
         FIG.  17    is a perspective view of a folding exercise rack system during adjustment between retracted and extended positions in accordance with a second exemplary embodiment. 
         FIG.  18    is a front view of a folding exercise rack system during adjustment between retracted and extended positions in accordance with a second exemplary embodiment. 
         FIG.  19    is a side view of a folding exercise rack system during adjustment between retracted and extended positions in accordance with a second exemplary embodiment. 
         FIG.  20    is a top view of a folding exercise rack system during adjustment between retracted and extended positions in accordance with a second exemplary embodiment. 
         FIG.  21    is a perspective view of a folding exercise rack system in a retracted position in accordance with a second exemplary embodiment. 
         FIG.  22    is a front view of a folding exercise rack system in a retracted position in accordance with a second exemplary embodiment. 
         FIG.  23    is a side view of a folding exercise rack system in a retracted position in accordance with a second exemplary embodiment. 
         FIG.  24    is a top view of a folding exercise rack system in a retracted position in accordance with a second exemplary embodiment. 
         FIG.  25    is a perspective view of a folding exercise rack system in an extended position in accordance with a third exemplary embodiment. 
         FIG.  26    is a front view of a folding exercise rack system in an extended position in accordance with a third exemplary embodiment. 
         FIG.  27    is a side view of a folding exercise rack system in an extended position in accordance with a third exemplary embodiment. 
         FIG.  28    is a top view of a folding exercise rack system in an extended position in accordance with a third exemplary embodiment. 
         FIG.  29    is a perspective view of a folding exercise rack system during adjustment between retracted and extended positions in accordance with a third exemplary embodiment. 
         FIG.  30    is a front view of a folding exercise rack system during adjustment between retracted and extended positions in accordance with a third exemplary embodiment. 
         FIG.  31    is a side view of a folding exercise rack system during adjustment between retracted and extended positions in accordance with a third exemplary embodiment. 
         FIG.  32    is a top view of a folding exercise rack system during adjustment between retracted and extended positions in accordance with a third exemplary embodiment. 
         FIG.  33    is a perspective view of a folding exercise rack system in a retracted position in accordance with a third exemplary embodiment. 
         FIG.  34    is a front view of a folding exercise rack system in a retracted position in accordance with a third exemplary embodiment. 
         FIG.  35    is a side view of a folding exercise rack system in a retracted position in accordance with a third exemplary embodiment. 
         FIG.  36    is a top view of a folding exercise rack system in a retracted position in accordance with a third exemplary embodiment. 
         FIG.  37    is a perspective view of a folding exercise rack system in an extended position in accordance with a fourth exemplary embodiment. 
         FIG.  38    is a front view of a folding exercise rack system in an extended position in accordance with a fourth exemplary embodiment. 
         FIG.  39    is a side view of a folding exercise rack system in an extended position in accordance with a fourth exemplary embodiment. 
         FIG.  40    is a top view of a folding exercise rack system in an extended position in accordance with a fourth exemplary embodiment. 
         FIG.  41    is a perspective view of a folding exercise rack system during adjustment between retracted and extended positions in accordance with a fourth exemplary embodiment. 
         FIG.  42    is a front view of a folding exercise rack system during adjustment between retracted and extended positions in accordance with a fourth exemplary embodiment. 
         FIG.  43    is a side view of a folding exercise rack system during adjustment between retracted and extended positions in accordance with a fourth exemplary embodiment. 
         FIG.  44    is a top view of a folding exercise rack system during adjustment between retracted and extended positions in accordance with a fourth exemplary embodiment. 
         FIG.  45    is a perspective view of a folding exercise rack system in a retracted position in accordance with a fourth exemplary embodiment. 
         FIG.  46    is a front view of a folding exercise rack system in a retracted position in accordance with a fourth exemplary embodiment. 
         FIG.  47    is a side view of a folding exercise rack system in a retracted position in accordance with a fourth exemplary embodiment. 
         FIG.  48    is a top view of a folding exercise rack system in a retracted position in accordance with a fourth exemplary embodiment. 
     
    
    
     DETAILED DESCRIPTION 
     A. Overview 
     Some of the various embodiments of the present disclosure relate to a foldable exercise rack system that can be collapsed or folded in on itself into a retracted position. In some of the embodiments, an exercise rack  11  of the foldable exercise rack system may additionally be adjustable with respect to a wall  12 . 
     Each of the exemplary embodiments generally includes an exercise rack  11  comprising a first frame  15  and a second frame  16 . The first frame  15  generally includes a first inner support member  20 , a first outer support member  30 , and a pair of first arms  40 ,  50  connected between the first inner and outer support members  20 ,  30 . The second frame  16  generally includes a second inner support member  25 , a second outer support member  35 , and a pair of second arms  45 ,  55  connected between the second inner and outer support members  25 ,  35 . In each of the exemplary embodiments, the first and second frames  15 ,  16  may be pivoted inwardly into a retracted (e.g., collapsed, folded) position and may be pivoted outwardly into an extended position. 
     In the first exemplary embodiment shown in  FIGS.  1 - 12   , a first upper arm  40  is pivotably connected at its first end  41  to the first inner support member  20 , a first lower arm  50  is pivotably connected at its first end  51  to the first inner support member  20  below the first upper arm  40 , a second upper arm  45  is pivotably connected at its first end  46  to the second inner support member  25 , and a second lower arm  55  is pivotably connected at its first end  56  to the second inner support member  25  below the second upper arm  45 . 
     A first outer support member  30  is slidably connected between the first upper and lower arms  40 ,  50  and a second outer support member  35  is slidably connected between the second upper and lower arms  45 ,  55 . The outer support members  30 ,  35  may be slid inwardly towards their respective inner support members  20 ,  25  or outwardly away from their respective inner support members  20 ,  25 . The upper arms  40 ,  45  may be pivoted inwardly and downwardly towards the first and second inner support members  20 ,  25  or pivoted outwardly and upwardly away from the first and second inner support members  20 ,  25 . The lower arms  50 ,  55  may be pivoted inwardly and upwardly towards the first and second inner support members  20 ,  25  or pivoted outwardly and downwardly away from the first and second inner support members  20 ,  25 . 
     In the second exemplary embodiment shown in  FIGS.  13 - 24   , each of the frames  15 ,  16  are pivotably connected to one or more of a plurality of hinges  71   a ,  71   b ,  76   a ,  76   b  by one or more of a plurality of linkages  70   a ,  70   b ,  75   a ,  75   b . The first and second frames  15 ,  16  may be folded inwardly into a retracted (e.g., folded, collapsed) position or folded outwardly into an extended position, with the frames  15 ,  16  pivoting about the hinges  71   a ,  71   b ,  76   a ,  76   b  with respect to the wall  12 . 
     In the third and fourth exemplary embodiments shown in  FIGS.  25 - 36  and  37 - 48   , each of the frames  15 ,  16  may be folded inwardly into a retracted (e.g., collapsed, folded) position or folded outwardly into an extended position. The first upper and lower arms  40 ,  50  are pivotably connected at their first ends  41 ,  51  to a hinge  71   a ,  76   a  and fixedly connected at their second ends  42 ,  52  to the first outer support member  30 . The second upper and lower arms  45 ,  55  are pivotably connected at their first ends  46 ,  56  to a hinge  71   b ,  76   b  and fixedly connected at their second ends  47 ,  57  to the second outer support member  35 . 
     The first, third, and fourth embodiments shown in  FIGS.  1 - 12  and  25 - 48    may also be adjusted with respect to the wall  12 . The first and third embodiments may be adjustably connected to the wall  12  by one or more brackets  90 ,  95  which pivot inwardly and upwardly towards the wall  12  or outwardly and downwardly away from the wall. The fourth embodiment may be adjustably connected to the wall  12  by a plurality of scissor connectors  101   a ,  101   b ,  106   a ,  106   b  which adjust inwardly towards the wall  12  or outwardly away from the wall  12 . 
     B. Exercise Rack 
     As shown throughout the figures, the systems and methods described herein may each utilize a plurality of support members  20 ,  25 ,  30 ,  35  which, taken together, form an exercise rack  11  that is adapted to be extended away from a wall  12  for use, and folded/retracted towards the wall  12  for storage. While each of the embodiments described herein illustrate the usage of four discrete support members  20 ,  25 ,  30 ,  35 , it should be appreciated that, in some embodiments, more or less support members  20 ,  25 ,  30 ,  35  may be utilized. 
     The figures illustrate embodiments which utilize a first inner support member  20 , a second inner support member  25 , a first outer support member  30 , and a second outer support member  35 . Each of the support members  20 ,  25 ,  30 ,  35  are illustrated as being distally-spaced with respect to each other. The distance between the respective support members  20 ,  25 ,  30 ,  35  may vary in different embodiments to suit different exercise rack  11  configurations and types of exercises. 
     Each of the support members  20 ,  25 ,  30 ,  35  may include various openings  18  on any of their respective sides. The exemplary figures illustrate the support members  20 ,  25 ,  30 ,  35  which include openings  18  on their respective outer sides  24 ,  29 ,  34 ,  39 . It should be appreciated that such openings  18  may be included on any surface of any portion of the exercise rack  11 , and thus should not be construed as limited to the locations shown in the exemplary figures. The openings  18  may be utilized to secure various other devices, such as exercise attachments and the like, to various portions of the exercise rack  11 , such as but not limited to one or more of the support members  20 ,  25 ,  30 ,  35 . The openings  18  may also be utilized to secure brackets, arms, or other structural components of an exercise rack  11  to the support members  20 ,  25 ,  30 ,  35  such as by use of fasteners as shown in the figures. 
     In the exemplary embodiments shown in the figures, it can be seen that a pair of inner support members  20 ,  25  are adapted to be secured to a wall  12 . The manner by which the inner support members  20 ,  25  are secured to the wall  12  may vary in different embodiments. In some embodiments, the inner support members  20 ,  25  may be adjustably secured to the wall  12  such that the inner support members  20 ,  25  may be adjusted towards or away from the wall  12  and/or be raised or lowered. In other embodiments, the inner support members  20 ,  25  may be fixedly secured to the wall  12 . 
     It should be appreciated that the inner support members  20 ,  25  may be directly or indirectly connected to the wall  12 . In some embodiments, the inner support members  20 ,  25  may be directly secured to the wall  12 , such as by use of various fasteners and the like. In other embodiments, the inner support members  20 ,  25  may be indirectly secured to the wall  12 , such as by usage of wall mounts  60 ,  65  as shown in  FIGS.  13 - 24   , brackets  90 ,  95  such as shown in  FIGS.  1 - 12  and  25 - 36   , scissor connectors  101   a ,  101   b ,  106   a ,  106   b  such as shown in  FIGS.  37 - 48   , and various other hinges, brackets, or other devices. 
     As shown throughout the figures, the first inner support member  20  includes an upper end  21  and a lower end  22 . An inner side  23  of the first inner support member  20  faces towards the wall  12  and an outer side  24  of the first inner support member  20  faces away from the wall  12 . Similarly, the second inner support member  25  includes an upper end  26  and a lower end  27 . An inner side of the second inner support member  25  faces towards the wall  12  and an outer side  29  of the second support member  25  faces away from the wall  12 . 
     The first and second inner support members  20 ,  25  will generally be aligned and parallel as shown in the figures. In some embodiments such as shown in  FIGS.  13 - 24   , the first and second inner support members  20 ,  25  may be interconnected so as to be adjusted together (e.g., such that adjustment of the first inner support member  20  causes similar adjustment in the second inner support member  25 , and vice versa). 
     In other embodiments such as shown in  FIGS.  1 - 12  and  25 - 48   , the first and second inner support members  20 ,  25  may not be interconnected with each other. In such embodiments, each of the first and second inner support members  20 ,  25  may be independently adjusted (e.g., such that the first inner support member  20  may be adjusted independently of the second inner support member  25 , and vice versa). 
     In the exemplary embodiments shown in  FIGS.  1 - 12  and  25 - 48   , it can be seen that the first and second inner support members  20 ,  25  may be interconnected with each other. For example, the embodiments shown in  FIGS.  1 - 12  and  25 - 48    illustrate an inner cross bar  49  which is connected between the first and second inner support members  20 ,  25 . While the figures illustrate that the inner cross bar  49  may be positioned at or near the respective upper ends  21 ,  26  of the inner support members  20 ,  25 , it should be appreciated that the inner cross bar  49  may be positioned at various other locations on the inner support members  20 ,  25  (e.g., alternatively or additionally at or near the lower ends  22 ,  27  of the inner support members  20 ,  25 ). 
     As shown throughout the figures, a pair of outer support members  30 ,  35  may be interconnected with the pair of inner support members  20 ,  25  to form the exercise rack  11 . In the exemplary embodiments shown throughout the figures, it can be seen that a first outer support member  30  is aligned with and distally positioned with respect to the first inner support member  20 , and a second outer support member  35  is aligned with and distally positioned with respect to the second inner support member  35 . When extended, the inner and outer support members  20 ,  25 ,  30 ,  35  may be positioned to form a square- or rectangular-shaped configuration when viewed from the top such as in the figures. 
     As shown in the figures, it can be seen that the first outer support member  30  may comprise an upper end  31 , a lower end  32 , an inner side  33 , and an outer side  34 . The inner side  33  of the first outer support member  30  faces towards the wall  12  and the outer side  34  of the first outer support member  30  faces away from the wall  12 . Similarly, the second outer support member  35  may comprise an upper end  36 , a lower end  37 , an inner side  38 , and an outer side  39 . The inner side  38  of the second outer support member  35  faces towards the wall  12  and the outer side  39  of the second outer support member  35  faces away from the wall  12 . 
     Each of the outer support members  30 ,  35  may be interconnected (e.g., indirectly connected) with a respective inner support member  20 ,  25 . Thus, as shown in  FIGS.  1 - 48   , the first outer support member  30  may be interconnected with the first inner support member  20  and the second outer support member  35  may be interconnected with the second inner support member  25 . 
     As best shown in  FIGS.  3 ,  15 ,  27 , and  39   , it can be seen that a first upper arm  40  may be connected between the first inner support member  20  and the first outer support member  30 . The first upper arm  40  may comprise an elongated member such as a rod or the like including a first end  41  and a second end  42 . The first end  41  of the first upper arm  40  may be connected to the first inner support member  20  and the second end  42  of the first upper arm  40  may be connected to the first outer support member  30 . 
     The positioning of the first upper arm  40  with respect to the first inner and outer support members  20 ,  30  may vary in different embodiments. In the exemplary embodiments shown in the figures, the first upper arm  40  is positioned at or near the respective upper ends  21 ,  31  of the first inner and outer support members  20 ,  30 . In other embodiments, the first upper arm  40  may be positioned at various other locations along the length of the first inner and outer support members  20 ,  30 . 
     The first upper arm  40  may be fixedly connected between the first inner and outer support members  20 ,  30  such as shown in  FIGS.  13 - 24   , or may be pivotably connected such as shown in  FIGS.  1 - 12  and  25 - 48   . The manner by which the first upper arm  40  is connected between the first and outer support members  20 ,  30  may vary in different embodiments. By way of example, brackets, fasteners, hinges, and various other types of connectors may be utilized in different embodiments as discussed in more detail below. 
     As best shown in  FIGS.  1 ,  13 ,  25 , and  37   , it can be seen that a first lower arm  50  may be connected between the first inner support member  20  and the first outer support member  30  below the first upper arm  40 . The first lower arm  50  may comprise an elongated member such as a rod or the like including a first end  51  and a second end  52 . The first end  51  of the first lower arm  50  may be connected to the first inner support member  20  and the second end  52  of the first lower arm  50  may be connected to the first outer support member  30 . 
     The positioning of the first lower arm  50  with respect to the first inner and outer support members  20 ,  30  may vary in different embodiments. In the exemplary embodiments shown in the figures, the first lower arm  50  is positioned at or near the respective lower ends  22 ,  32  of the first inner and outer support members  20 ,  30 . In other embodiments, the first lower arm  50  may be positioned at various other locations along the length of the first inner and outer support members  20 ,  30 . 
     The first lower arm  50  may be fixedly connected between the first inner and outer support members  20 ,  30  such as shown in  FIGS.  13 - 24   , or may be pivotably connected such as shown in  FIGS.  1 - 12  and  25 - 48   . The manner by which the first lower arm  50  is connected between the first and outer support members  20 ,  30  may vary in different embodiments. By way of example, brackets, fasteners, hinges, and various other types of connectors may be utilized in different embodiments as discussed in more detail below. 
     As shown throughout the figures, it can be seen that a second upper arm  45  may be connected between the second inner support member  25  and the second outer support member  35 . The second upper arm  45  may comprise an elongated member such as a rod or the like including a first end  46  and a second end  47 . The first end  46  of the second upper arm  45  may be connected to the second inner support member  25  and the second end  47  of the second upper arm  45  may be connected to the second outer support member  35 . 
     The positioning of the second upper arm  45  with respect to the second inner and outer support members  25 ,  35  may vary in different embodiments. In the exemplary embodiments shown in the figures, the second upper arm  45  is positioned at or near the respective upper ends  26 ,  36  of the second inner and outer support members  25 ,  35 . In other embodiments, the second upper arm  45  may be positioned at various other locations along the length of the second inner and outer support members  25 ,  35 . 
     The second upper arm  45  may be fixedly connected between the second inner and outer support members  25 ,  35  such as shown in  FIGS.  13 - 24   , or may be pivotably connected such as shown in  FIGS.  1 - 12  and  25 - 48   . The manner by which the second upper arm  45  is connected between the second and outer support members  25 ,  35  may vary in different embodiments. By way of example, brackets, fasteners, hinges, and various other types of connectors may be utilized in different embodiments as discussed in more detail below. 
     As shown throughout the figures, a second lower arm  55  may be connected between the second inner support member  25  and the second outer support member  35  below the second upper arm  45 . The second lower arm  55  may comprise an elongated member such as a rod or the like including a first end  56  and a second end  57 . The first end  56  of the second lower arm  55  may be connected to the second inner support member  25  and the second end  57  of the second lower arm  55  may be connected to the second outer support member  35 . 
     The positioning of the second lower arm  55  with respect to the second inner and outer support members  25 ,  35  may vary in different embodiments. In the exemplary embodiments shown in the figures, the second lower arm  55  is positioned at or near the respective lower ends  27 ,  37  of the second inner and outer support members  25 ,  35 . In other embodiments, the second lower arm  55  may be positioned at various other locations along the length of the second inner and outer support members  25 ,  35 . 
     The second lower arm  55  may be fixedly connected between the second inner and outer support members  25 ,  35  such as shown in  FIGS.  13 - 24   , or may be pivotably connected such as shown in  FIGS.  1 - 12  and  25 - 48   . The manner by which the second lower arm  55  is connected between the second and outer support members  25 ,  35  may vary in different embodiments. By way of example, brackets, fasteners, hinges, and various other types of connectors may be utilized in different embodiments as discussed in more detail below. 
     As shown in  FIGS.  1 - 48   , the first inner support member  20 , the first outer support member  30 , the first upper arm  40 , and the first lower arm  50  are each interconnected so as to form a first frame  15 . Similarly, the second inner support member  25 , the second outer support member  35 , the second upper arm  45 , and the second lower arm  55  are each interconnected so as to form a second frame  16  which may be a mirror of the first frame  15 . 
     The respective frames  15 ,  16  may be interconnected with each other such as shown in  FIGS.  1 - 12  and  25 - 48    (e.g., by the use of an inner cross bar  49 ) or may not be interconnected with each other such as shown in  FIGS.  13 - 24   . In some embodiments, each frame  15 ,  16  may be independently pivoted inwardly towards the wall  12  or pivoted outwardly away from the wall  12  as discussed herein. The frames  15 ,  16  will each generally be comprised of a rectangular shape as shown in the figures, though other shapes may be utilized in some embodiments. In some embodiments, the frames  15 ,  16  may each be square-shaped. 
     It should be appreciated that a wide range of exercise attachments may be removably connected to the exercise rack  11  formed by the inner and outer support members  20 ,  25 ,  30 ,  35 . It can be seen in the figures that a cross bar  80  may be removably connected between the first and second outer support members  30 ,  35 . Such a cross bar  80  may be utilized, e.g., as a pull-up bar for performing pull-ups. The figures illustrate the cross bar  80  being removably secured between the respective upper ends  31 ,  36  of the first and second outer support members  30 ,  35 . However, using the openings  18  extending along the first and second outer support members  30 ,  35 , the height of the cross bar  80  may be adjusted to suit different exercisers. 
     While the figures only illustrate use of a cross bar  80  with the exercise rack  11 , it should be appreciated that any type of exercise attachment known for use with an exercise rack  11  may be utilized with the systems and methods described herein. By way of example and without limitation, such exercise attachments may include weightlifting attachments (e.g., brackets for supporting weightlifting bars), mobility bands, dip stations, benches, spotter arms, and the like. By way of example and without limitation, the various exercise attachments shown and described in U.S. Pat. No. 11,058,936 may be utilized in connection with the folding exercise rack system, the entire disclosure of which, except for any definitions, disclaimers, disavowals, and inconsistencies, are incorporated herein by reference. 
     As shown throughout the figures, each of the embodiments shown and described herein may be adjusted between various positions, such as by pivoting/swinging various elements towards or away from the wall  12 . In the embodiments shown in  FIGS.  13 - 48   , it can be seen that the first and second outer support members  30 ,  35  may be pivoted inwardly towards the wall  12  (e.g., by swinging side-to-side) for storage. In the embodiment shown in  FIGS.  1 - 12   , it can be seen that the first and second outer members  30 ,  35  may be slid towards the first and second inner support members  20 ,  25 , with the upper and lower arms  40 ,  45 ,  50 ,  55  being pivoted upwardly/downwardly into a folded configuration. The manner by which the outer support members  30 ,  35  may be so adjusted may vary as discussed in more detail below. 
     It can also be seen in  FIGS.  1 - 12  and  25 - 48    that the inner support members  20 ,  25  may in some embodiments be similarly adjustable. For example, as shown in  FIGS.  1 - 12   , the inner support members  20 ,  25  may be adjusted towards or away from the wall  12 . As a further example, the inner support members  20 ,  25  may additionally or alternatively be adjusted upwardly or downwardly with respect to the wall  12 . The manner by which the inner support members  20 ,  25  are so adjusted may vary as discussed in more detail below. 
     C. First Exemplary Embodiment (FIGS.  1 - 12 ) 
       FIGS.  1 - 12    illustrate a first exemplary embodiment of a folding exercise rack system. As shown in the figures, the first exemplary embodiment includes an exercise rack  11  comprised of a first frame  15  comprised of a first inner support member  20 , a first outer support member  30 , a first upper arm  40  connected near the respective upper ends  21 ,  31  of the first inner support member  20  and the first outer support member  30 , and a first lower arm  50  connected near the respective lower ends  22 ,  32  of the first inner support member  20  and the first outer support member  30 . 
     Continuing to reference  FIGS.  1 - 12   , a second frame  16  is shown in a distally-spaced position along the wall  12  from the first frame  15 . The second frame  16  may comprise a second inner support member  25 , a second outer support member  35 , a second upper arm  45  connected near the respective upper ends  26 ,  36  of the second inner support member  25  and the second outer support member  35 , and a second lower arm  55  connected near the respective lower ends  27 ,  37  of the second inner support member  25  and the second outer support member  35 . 
     As best shown in  FIG.  1   , the first and second frames  15 ,  16 , which form an exercise rack  11 , may be interconnected by an inner cross bar  49 . The inner cross bar  49  is shown as being connected between a point near the respective upper ends  21 ,  31  of the first and second inner support members  20 ,  30 . However, the inner cross bar  49  may be positioned at various other locations along the length of the first and second inner support members  20 ,  30  in some embodiments. 
     Generally, the exercise rack  11  shown in  FIGS.  1 - 12    may be adjustable between an extended and a retracted (e.g., folded, collapsed) position. The manner by which the exercise rack  11  is adjusted may vary. In the exemplary embodiment shown in  FIGS.  1 - 12   , the first and second outer support members  30 ,  35  may be slid inwardly or outwardly along the upper and lower arms  40 ,  45 ,  50 ,  55 , with the upper and lower arms  40 ,  45 ,  50 ,  55  pivoting upwardly/downwardly into the retracted (e.g., folded) position. 
       FIGS.  1 - 4    illustrate such an exercise rack  11  in an extended position, in which the first and second outer support members  30 ,  35  are releasably locked into an outer position at or near the respective second ends  42 ,  47 ,  52 ,  57  of the upper and lower arms  40 ,  45 ,  50 ,  55  which is distally-spaced away from the wall  12 . As shown, the upper and lower arms  40 ,  45 ,  50 ,  55  are each positioned perpendicular to each of the wall  12 , inner support members  20 ,  25 , and outer support members  30 ,  35  in an extended position. 
       FIGS.  5 - 8    illustrate the exercise rack  11  midway through being adjusted into a retracted (e.g., folded) position. As shown, the outer support members  30 ,  35  have been unlocked and are being slid towards the wall  12  along the upper and lower arms  40 ,  45 ,  50 ,  55 . More specifically, it can be seen that the first outer support member  30  is being slid between the first upper arm  40  and the first lower arm  50  towards the first inner support member  20 . Similarly, it can be seen that the second outer support member  35  is being slid between the second upper arm  45  and the second lower arm  55  towards the second inner support member  25 . 
     Continuing to reference  FIGS.  5 - 8   , it can be seen that the upper and lower arms  40 ,  45 ,  50 ,  55  are midway through being retracted (e.g., folded) inwardly towards the wall  12  and first and second inner support members  20 ,  25 . More specifically, it can be seen that the first upper arm  40  is pivoting downwardly towards the wall  12  and first inner support member  20 . The first lower arm  50  is pivoting upwardly towards the wall  12  and first inner support member  20 . The second upper arm  45  is pivoting downwardly towards the wall  12  and second inner support member  25 . The second lower arm  55  is pivoting upwardly towards the wall  12  and second inner support member  25 . 
       FIGS.  9 - 12    illustrate the exercise rack  11  in the retracted (e.g., folded) position. As shown in  FIGS.  9 - 12   , the first and second outer support members  30 ,  35  have been slid to rest against the first and second inner support members  20 ,  25 , and the upper and lower arms  40 ,  45 ,  50 ,  55  have been pivoted inwardly towards the wall  12  and inner support members  20 ,  25  to rest against the outer support members  30 ,  35 . 
     More specifically, the first outer support member  30  has been slid in to rest against the first inner support member  20 , with the first upper arm  40  pivoted downwardly to rest against the first outer support member  30  and the first lower arm  50  pivoted upwardly to rest against the first outer support member  30 . Similarly, the second outer support member  35  has been slid in to rest against the second inner support member  25 , with the second upper arm  45  pivoted downwardly to rest against the second outer support member  35  and the second lower arm  55  pivoted upwardly to rest against the second outer support member  35 . 
     As shown throughout  FIGS.  1 - 12   , the exercise rack  11  itself may be adjustable with respect to the wall  12  between an extended position in which the first inner support member  20  and the second inner support member  25  are distally positioned away from the wall and a retracted position in which the first inner support member  20  and the second inner support member  25  are positioned adjacent to the wall  12 . 
     The manner by which the exercise rack  11  is so adjusted with respect to the wall  12  may vary. In the embodiment shown in  FIGS.  1 - 12   , the inner support members  20 ,  25  are each adapted to be raised into the retracted position and lowered into the extended position. By way of non-limiting example, one or more brackets  90 ,  95  may be connected between the inner support members  20 ,  25  and the wall  12 . 
     As best shown in  FIGS.  1 ,  5 , and  9   , the exercise rack  11  may be adjustably connected to the wall  12  by one or more brackets  90 ,  95 . Although the FIGS. illustrate usage of a pair of brackets  90 ,  95 , it should be appreciated that, in some embodiments (e.g., compact embodiments or embodiments utilizing lightweight materials), only a single bracket  90 ,  95  may be utilized. In other embodiments, additional brackets  90 ,  95  (e.g., three, four, five, etc.) may be utilized. 
     In the exemplary embodiment shown in the figures, an upper bracket  90  is connected between the wall  12  and a position at or near the upper ends  21 ,  26  of the inner support members  20 ,  25 . A lower bracket  95  is connected between the wall  12  and the inner support members  20 ,  25  below the upper bracket  90 . Each of the brackets  90 ,  95  are adapted to pivot the exercise rack  11  towards the wall or away from the wall  12 . In the embodiment shown in the figures, the exercise rack  11  is raised into the retracted position and lowered into the extended position. Such an embodiment functions to raise the exercise rack  11  off of the floor  13  when the exercise rack  11  is retracted such as shown in  FIGS.  9 - 12   . 
     The configuration of the brackets  90 ,  95  may vary in different embodiments. In the exemplary embodiment shown in  FIGS.  1 - 12   , the upper bracket  90  is shown as comprising an upper wall mount  94  which is secured to the wall  12  (e.g., by fasteners) and a pair of arms  91   a ,  91   b  which are each pivotably connected between the upper wall mount  94  and the respective inner support members  20 ,  25 . The pair of arms  91   a ,  91   b  may comprise a first arm  91   a  connected near a first side of the upper wall mount  94  and a second arm  91   b  connected near a second side of the upper wall mount  94 . 
     More specifically, it can be seen that a first arm  91   a  is pivotably connected at its first end to the upper wall mount  94  and is pivotably connected at its second end to the first inner support member  20 . Similarly, a second arm  91   b  is pivotably connected at its first end to the upper wall mount  94  and is pivotably connected at its second end to the second inner support member  25 . A first shock  92   a  may be connected between the upper wall mount  94  and the first arm  91   a , and a second shock  92   b  may be connected between the upper wall mount  94  and the second arm  91   b.    
     Continuing to reference  FIGS.  1 - 12   , it can be seen that the lower bracket  95  may comprise a lower wall mount  99  which is secured to the wall  12  (e.g., by fasteners) and a pair of arms  96   a ,  96   b  which are each pivotably connected between the lower wall mount  99  and the respective inner support members  20 ,  25 . The pair of arms  96   a ,  96   b  may be comprised of a first arm  96   a  which is connected near a first side of the lower wall mount  99  and a second arm  96   b  which is connected near a second side of the lower wall mount  99 . 
     The first arm  96   a  may be pivotably connected at its first end to the lower wall mount  99  and at its second end to the first inner support member  20 . Similarly, the second arm  96   b  may be pivotably connected at its first end to the lower wall mount  99  and at its second end to the second inner support member  25 . A first shock  97   a  may be connected between the lower wall mount  99  and the first arm  96   a , and a second shock  97   b  may be connected between the lower wall mount  99  and the second arm  96   b.    
     As shown in  FIGS.  1 - 12   , the respective brackets  90 ,  95  may be pivoted upwardly into the retracted position adjacent to the wall  12 , and pivoted downwardly into the extended position which is distally positioned with respect to the wall  12 . The arms  91   a ,  91   b ,  96   a ,  96   b  may be pivoted upwardly to raise the inner support members  20 ,  25  (and thus the exercise rack  11 ) into the retracted position adjacent to the wall  12 , such as for storage. The arms  91   a ,  91   b ,  96   a ,  96   b  may conversely be pivoted downwardly to lower the inner support members  20 ,  25  (and thus the exercise rack  11 ) into the extended position away from the wall  12 , ready for use. The shocks  92   a ,  92   b ,  97   a ,  97   b , which may be comprised of various devices such as actuators and the like, may aid in raising and lowering the exercise rack  11 . 
     As shown throughout the figures, the exercise rack  11  may comprise various openings  18  for attachment of various brackets, attachments, locking devices, and the like. The openings  18  may be positioned on various portions of the exercise rack  11 , such as but not limited to the inner support members  20 ,  25 , outer support members  30 ,  35 , upper arms  40 ,  45 , lower arms  50 ,  55 , inner cross bar  49 , and/or brackets  90 ,  95 . 
     As best shown in  FIGS.  5 - 8   , the first upper arm  40  is pivotably connected at its first end  41  to the first inner support member  20 . The first upper arm  40  may be pivotably connected to the first inner support member  20  such that the first upper arm  40  may be pivoted upwardly into a perpendicular position with respect to the first inner support member  20  and pivoted downwardly to rest against the first inner support member  20  in a parallel position. 
     A first upper hinge  110   a  may be utilized to pivotably connect the first inner support member  20  and the first end  41  of the first upper arm  40 . The type of hinge utilized may vary in different embodiments and thus should not be construed as limited by the exemplary embodiments shown in the figures. In the exemplary embodiment shown in  FIGS.  1 - 12   , it can be seen that the first upper hinge  110   a  may comprise a pair of L-shaped brackets which are connected on either side of the first inner support member  20 , with the first end  41  of the first upper arm  40  being pivotably connected between the pair of L-shaped brackets. 
     One or more first upper shocks  112   a  may be connected between the first inner support member  20  and the first upper arm  40  to aid with and/or smoothen adjustment of the first upper arm  40  between its positions with respect to the first inner support member  20 . In the exemplary embodiment shown in the figures, it can be seen that a first upper shock bracket  111   a  is connected near the upper end  21  of the first inner support member  20 , with the first upper shocks  112   a  being connected to the first upper shock bracket  111   a . The first upper shock bracket  111   a  may be comprised of various configurations, such as but not limited to a U-shaped bracket as shown in the figures. 
     A first lower hinge  115   a  may be utilized to pivotably connect the first inner support member  20  and the first end  51  of the first lower arm  50  such as shown in  FIGS.  3 ,  7 , and  11   . The type of hinge utilized may vary in different embodiments and thus should not be construed as limited by the exemplary embodiments shown in the figures. In the exemplary embodiment shown in  FIGS.  1 - 12   , it can be seen that the first lower hinge  115   a  may comprise a pair of L-shaped brackets which are connected on either side of the first inner support member  20 , with the first end  51  of the first lower arm  50  being pivotably connected between the pair of L-shaped brackets. 
     Although not shown in the embodiments shown in the figures, it should be appreciated that one or more first lower shocks may in some embodiments be connected between the first inner support member  20  and the first lower arm  50  to aid with and/or smoothen adjustment of the first lower arm  50  between its positions with respect to the first inner support member  20 . 
     A second upper hinge  110   b  may be utilized to pivotably connect the second inner support member  25  and the first end  46  of the second upper arm  45  such as shown in  FIGS.  1 ,  5 , and  9   . The type of hinge utilized may vary in different embodiments and thus should not be construed as limited by the exemplary embodiments shown in the figures. In the exemplary embodiment shown in  FIGS.  1 - 12    it can be seen that the second upper hinge  110   b  may comprise a pair of L-shaped brackets which are connected on either side of the second inner support member  25 , with the first end  46  of the first second arm  45  being pivotably connected between the pair of L-shaped brackets. 
     One or more second upper shocks  112   b  may be connected between the second inner support member  25  and the second upper arm  45  to aid with and/or smoothen adjustment of the second upper arm  45  between its positions with respect to the second inner support member  25 . In the exemplary embodiment shown in the figures, it can be seen that a second upper shock bracket  111   b  is connected near the upper end  26  of the second inner support member  25 , with the second upper shocks  112   b  being connected to the second upper shock bracket  111   b . The second upper shock bracket  111   b  may be comprised of various configurations, such as but not limited to a U-shaped bracket as shown in the figures. 
     A second lower hinge  115   b  may be utilized to pivotably connect the second inner support member  25  and the first end  56  of the second lower arm  55  such as shown in  FIGS.  1 ,  5 , and  9   . The type of hinge utilized may vary in different embodiments and thus should not be construed as limited by the exemplary embodiments shown in the figures. In the exemplary embodiment shown in  FIGS.  1 - 12   , it can be seen that the second lower hinge  115   b  may comprise a pair of L-shaped brackets which are connected on either side of the second inner support member  25 , with the first end  56  of the second lower arm  55  being pivotably connected between the pair of L-shaped brackets. 
     Although not shown in the embodiments shown in the figures, it should be appreciated that one or more second lower shocks may in some embodiments be connected between the second inner support member  25  and the second lower arm  55  to aid with and/or smoothen adjustment of the second lower arm  55  between its positions with respect to the second inner support member  25 . 
     As best shown in  FIGS.  1 ,  5 , and  9   , each of the upper and lower arms  40 ,  45 ,  50 ,  55  may include slots  53 ,  58  within which the outer support members  30 ,  35  may slide when being adjusted inwardly towards the inner support members  20 ,  25  or outwardly away from the inner support members  20 ,  25 . While the slots of the upper arms  40 ,  45  are not visible in the figures, it should be appreciated that the first upper arm  40  may include a first upper slot along its lower surface and the second upper arm  45  may include a first lower slot along its lower surface. 
     As best shown in  FIGS.  1 ,  5 , and  9   , the first lower arm  50  may include a first lower slot  53  extending along its upper surface. Similarly, the second lower arm  55  may include a second lower slot  58  extending along its upper surface. The first outer support member  30  may be slidably positioned within the first upper slot of the first upper arm  40  and the first lower slot  53  of the first lower arm  50 . The second outer support member  35  may be slidably positioned within the second upper slot of the second upper arm  45  and the second lower slot  58  of the second lower arm  55 . The first outer support member  30  may thus include a projection such as a fastener or the like on each of its upper and lower ends  31 ,  32  to engage within the slots  53 . Similarly, the second outer support member  35  may include a projection such as a fastener or the like on each of its upper and lower ends  36 ,  37  to engage within the slots  58 . 
     As shown in  FIGS.  1 - 12   , each of the second ends  42 ,  47 ,  52 ,  57  (e.g., distal ends) of the upper and lower arms  40 ,  45 ,  50 ,  55  may include a bracket  120   a ,  120   b ,  125   a ,  125   b . Various types of brackets  120   a ,  120   b ,  125   a ,  125   b  may be utilized, including but not limited to the L-shaped brackets shown in the figures. The brackets  120   a ,  120   b ,  125   a ,  125   b  function to secure the respective outer support members  30 ,  35  in their extended positions such as shown in  FIGS.  1 - 4   . 
     With reference to  FIGS.  1 - 4   , it can be seen that the second end  42  of the first upper arm  40  includes a first upper bracket  120   a  comprised of a pair of L-shaped members secured (e.g., by fasteners, welding, adhesives, or the like) to the sides of the second end  42  of the first upper arm  40 . The first upper bracket  120   a  includes one or more openings which are adapted to align with one or more openings  18  of the first outer support member  30  when the first outer support member  30  is in its extended (e.g., outer) position. As shown in  FIG.  1   , a first upper locking member  85   a  may be selectively and removably inserted through such openings to lock the first outer member  30  in position at or near the second end  42  of the first upper arm  40 . 
     Continuing to reference  FIGS.  1 - 4   , it can be seen that the second end  52  of the first lower arm  50  includes a first lower bracket  125   a  comprised of a pair of L-shaped members secured (e.g., by fasteners, welding, adhesives, or the like) to the sides of the second end  52  of the first lower arm  50 . The first lower bracket  125   a  includes one or more openings which are adapted to align with one or more openings  18  of the first outer support member  30  when the first outer support member  30  is in its extended (e.g., outer) position. As shown in  FIG.  1   , a first lower locking member  86   a  may be selectively and removably inserted through such openings to lock the first outer member  30  in position at or near the second end  52  of the first lower arm  50 . 
     As should be apparent in the figures, the first outer support member  30  may be secured between the first upper bracket  120   a  and the first lower bracket  125   a  when the first outer support member  30  is in its outer position, distally spaced away from the first inner support member  20  and the wall  12 . More specifically, the upper end  31  of the first outer support member  30  may be releasably secured within the first upper bracket  120   a  and the lower end  32  of the first outer support member  30  may be releasably secured within the first lower bracket  125   a . The first upper and lower locking members  85   a ,  86   a  function to releasably secure the first outer support member  30  between the brackets  120   a ,  125   a.    
     Continuing to reference  FIGS.  1 - 4   , it can be seen that the second end  47  of the second upper arm  45  includes a second upper bracket  120   b  comprised of a pair of L-shaped members secured (e.g., by fasteners, welding, adhesives, or the like) to the sides of the second end  47  of the second upper arm  45 . The second upper bracket  120   b  includes one or more openings which are adapted to align with one or more openings  18  of the second outer support member  35  when the second outer support member  35  is in its extended (e.g., outer) position. As shown in  FIG.  1   , a second upper locking member  85   b  may be selectively and removably inserted through such openings to lock the second outer member  35  in position at or near the second end  47  of the second upper arm  45 . 
     Continuing to reference  FIGS.  1 - 4   , it can be seen that the second end  57  of the second lower arm  55  includes a second lower bracket  125   b  comprised of a pair of L-shaped members secured (e.g., by fasteners, welding, adhesives, or the like) to the sides of the second end  57  of the second lower arm  55 . The second lower bracket  125   b  includes one or more openings which are adapted to align with one or more openings  18  of the second outer support member  35  when the second outer support member  35  is in its extended (e.g., outer) position. As shown in  FIG.  1   , a second lower locking member  86   b  may be selectively and removably inserted through such openings to lock the second outer member  35  in position at or near the second end  57  of the second lower arm  55 . 
     As should be apparent in the figures, the second outer support member  35  may be secured between the second upper bracket  120   b  and the second lower bracket  125   b  when the second outer support member  35  is in its outer position, distally spaced away from the second inner support member  25  and the wall  12 . More specifically, the upper end  36  of the second outer support member  35  may be releasably secured within the second upper bracket  120   b  and the lower end  37  of the second outer support member  35  may be releasably secured within the second lower bracket  125   b . The second upper and lower locking member  85   b ,  86   b  function to releasably secure the second outer support member  35  between the brackets  120   b ,  125   b.    
     As best shown in  FIGS.  1 - 4   , a cross bar  80  may be connected between the upper brackets  120   a ,  120   b , such as by fasteners or the like. However, in some embodiments, the cross bar  80  may instead be connected between various locations along the lengths of the first and second outer support members  30 ,  35 . While the figures illustrate that the cross bar  80  remains interconnected between the outer support members  30 ,  35  when folded, in some embodiments, the cross bar  80  may be removably connected between the outer support members  30 ,  35  such that the cross bar  80  may be removed when the exercise rack is folded. 
     D. Second Exemplary Embodiment (FIGS.  13 - 24 ) 
       FIGS.  13 - 24    illustrate a second exemplary embodiment of a folding exercise rack system. As shown in the figures, the second exemplary embodiment includes an exercise rack  11  comprised of a first frame  15  comprised of a first inner support member  20 , a first outer support member  30 , a first upper arm  40  connected near the respective upper ends  21 ,  31  of the first inner support member  20  and the first outer support member  30 , and a first lower arm  50  connected near the respective lower ends  22 ,  32  of the first inner support member  20  and the first outer support member  30 . 
     Continuing to reference  FIGS.  13 - 24   , a second frame  16  is shown in a distally-spaced position along the wall  12  from the first frame  15 . The second frame  16  may comprise a second inner support member  25 , a second outer support member  35 , a second upper arm  45  connected near the respective upper ends  26 ,  36  of the second inner support member  25  and the second outer support member  35 , and a second lower arm  55  connected near the respective lower ends  27 ,  37  of the second inner support member  25  and the second outer support member  35 . 
     In the exemplary embodiment shown in  FIGS.  13 - 24   , it can be seen that the first and second frames  15 ,  16  are not interconnected with each other, except by a removable cross bar  80 . Thus, when the cross bar  80  is removed, the first and second frames  15 ,  16  may be independently adjusted (e.g., the first frame  15  may be adjusted independently of the second frame  16 , and vice versa). 
     Generally, the exercise rack  11  shown in  FIGS.  13 - 24    may be adjustable between an extended and a retracted (e.g., folded, collapsed) position. The manner by which the exercise rack  11  is adjusted may vary. As shown in the figures, the first frame  15  may be pivotably connected to the wall  12  and the second frame  16  may be pivotably connected to the wall  12 . In the exemplary embodiment shown in  FIGS.  13 - 24   , the first frame  15  may be pivoted inwardly towards the second frame  16 , and the second frame  16  may be pivoted inwardly towards the first frame  15 . 
     More specifically, it can be seen in  FIGS.  17 - 21    that the first frame  15  may be pivoted inwardly to be positioned adjacent to the wall  12  in an orientation which is parallel to the wall  12 . Similarly, the second frame  16  may be pivoted inwardly to be positioned adjacent the folded first frame  15  in an orientation which is parallel to the wall  12 . While the figures illustrate that the first frame  15  is pivoted first, and the second frame  16  is pivoted second, in some embodiments the reverse could be true (e.g., the second frame  16  could instead be pivoted first). 
       FIGS.  13 - 16    illustrate the exercise rack  11  in an extended position, in which the first and second frames  15 ,  16  are each extended perpendicular to the wall  12  such that the first and second outer support members  30 ,  35  are distally spaced away from the wall  12 . Thus, the upper and lower arms  40 ,  45 ,  50 ,  55  are shown as being each positioned perpendicularly with respect to the wall  12  and the upper and lower wall mounts  60 ,  65  which are discussed in more detail below. In such an extended position, the exercise rack  11  is ready for use. 
       FIGS.  17 - 20    illustrate the exercise rack  11  midway through being adjusted into the retracted (e.g., folded) position. As shown in  FIGS.  17 - 20   , the first frame  15  has been pivoted inwardly towards the wall  12  and the second frame  16 , with the first upper and lower arms  40 ,  50  being parallel to the wall  12 . The second frame  16  has not yet been pivoted inwardly, and thus the second upper and lower arms  45 ,  55  remain perpendicular to the wall  12 . 
       FIGS.  21 - 24    illustrate the exercise rack  11  in the retracted (e.g., folded) position. As shown in  FIGS.  21 - 24   , the first frame  15 , comprised of the first inner support member  20 , the first outer support member  30 , the first upper arm  40 , and the first lower arm  50 , has been pivoted inwardly to be positioned adjacent to and parallel with respect to the wall  12 . The second frame  16 , comprised of the second inner support member  25 , the second outer support member  35 , the second upper arm  45 , and the second lower arm  55 , has been pivoted inwardly to be positioned adjacent to and parallel with respect to the folded first frame  15 . Such a position may be desirable when the exercise rack  11  is not in use so as to not take up valuable space in an exercise space (e.g., home gym, garage, exercise studio, or the like). 
     As best shown in  FIGS.  13 - 24   , the exercise rack  11  may be adjustably connected to the wall  12  by one or more wall mounts  60 ,  65 . Each wall mount  60 ,  65  may comprise various structures and devices capable of supporting the weight of the exercise rack  11  when secured to a wall  12 , such as but not limited to the elongated, flat member shown in the figures. In the exemplary embodiment shown, a pair of wall mounts  60 ,  65  are utilized, comprising an upper wall mount  60  and a lower wall mount  65  positioned below the upper wall mount  60 . 
     Continuing to reference  FIGS.  13 - 24   , it can be seen that a first upper hinge  71   a  is connected to a first end of the upper wall mount  60  and a second upper hinge  71   b  is connected to a second end of the upper wall mount  60 . Similarly, a first lower hinge  76   a  is connected to a first end of the lower wall mount  65  and a second lower hinge  76   b  is connected to a second end of the lower wall mount  65 . In some embodiments, the hinges  71   a ,  71   b ,  76   a ,  76   b  may be integrally formed or indirectly connected to the respective wall mounts  60 ,  65 . Various types of hinges  71   a ,  71   b ,  76   a ,  76   b  capable of pivoting an elongated member may be utilized, and thus the configuration shown in the figures should not be construed as limiting in scope. 
     As best shown in  FIGS.  13 ,  17 , and  21   , a first upper linkage  70   a  is pivotably connected between the first upper hinge  71   a  and the first inner support member  20 , a second upper linkage  70   b  is pivotably connected between the second upper hinge  71   b  and the second inner support member  25 , a first lower linkage  75   a  is pivotably connected between the first lower hinge  76   a  and the first inner support member  20 , and a second lower linkage  75   b  is pivotably connected between the second lower hinge  76   b  and the second inner support member  25 . The number of linkages  70   a ,  70   b ,  75   a ,  75   b  and/or hinges  71   a ,  71   b ,  76   a ,  76   b  may vary in different embodiments. 
     Continuing to reference  FIGS.  13 ,  17 , and  21   , it can be seen that the first upper linkage  70   a  may be comprised of an elongated member including a first end and a second end. The first end of the first upper linkage  70   a  may be pivotably connected to the first upper hinge  71   a  and the second end of the first upper linkage  70   a  may be connected in a non-movable manner to the first inner support member  20  near its upper end  21 . However, in some embodiments, the second end of the first upper linkage  70   a  may be secured to various other positions along the length of the first inner support member  20 . As shown in the figures, a bracket, fasteners, and/or other connecting devices may be utilized to secure the second end of the first upper linkage  70   a  to the first inner support member  20 . 
     The length of the first upper linkage  70   a  may vary in different embodiments. The figures illustrate an embodiment in which the length of the first upper linkage  70   a  is approximately a quarter of the length of the first upper arm  40 . It should be appreciated that the ratio of lengths between the first upper linkage  70   a  and the first upper arm  40  may vary in different embodiments and thus should not be construed as limited by the exemplary figures. 
     As best shown in  FIGS.  13 ,  17 , and  21   , the first upper hinge  71   a  may include a first upper pin  73   a  and the first upper linkage  70   a  may include a first upper slot  72   a . The first upper pin  73   a  may be positioned within the first upper slot  72   a  such that the first upper pin  73   a  may slide within the first upper slot  72   a . A first upper guide member  74   a  may be pivotably connected between the first upper linkage  70   a  and the first upper hinge  71   a , with the first upper guide member  74   a  functioning to guide pivotal movement of the first upper linkage  70   a  with respect to the first upper hinge  71   a.    
     With reference to  FIGS.  13 - 24   , it can be seen that the first lower linkage  75   a  may be comprised of an elongated member including a first end and a second end. The first end of the first lower linkage  75   a  may be pivotably connected to the first lower hinge  76   a  and the second end of the first lower linkage  75   a  may be connected in a non-movable manner to the first inner support member  20  near its lower end  22 . However, in some embodiments, the second end of the first lower linkage  75   a  may be secured to various other positions along the length of the first inner support member  20 . As shown in the figures, a bracket, fasteners, and/or other connecting devices may be utilized to secure the second end of the first lower linkage  75   a  to the first inner support member  20 . 
     The length of the first lower linkage  75   a  may vary in different embodiments. The figures illustrate an embodiment in which the length of the first lower linkage  75   a  is approximately a quarter of the length of the first lower arm  50 . It should be appreciated that the ratio of lengths between the first lower linkage  75   a  and the first lower arm  50  may vary in different embodiments and thus should not be construed as limited by the exemplary figures. 
     As shown in  FIGS.  13 - 24   , the first lower hinge  76   a  may include a first lower pin  78   a  and the first lower linkage  75   a  may include a first lower slot  77   a . The first lower pin  78   a  may be positioned within the first lower slot  77   a  such that the first lower pin  78   a  may slide within the first lower slot  77   a . A first lower guide member  79   a  may be pivotably connected between the first lower linkage  75   a  and the first lower hinge  76   a , with the first lower guide member  79   a  functioning to guide pivotal movement of the first lower linkage  75   a  with respect to the first lower hinge  76   a.    
     Continuing to reference  FIGS.  13 - 24   , it can be seen that the second upper linkage  70   b  may be comprised of an elongated member including a first end and a second end. The first end of the second upper linkage  70   b  may be pivotably connected to the second upper hinge  71   b  and the second end of the second upper linkage  70   b  may be connected in a non-movable manner to the second inner support member  25  near its upper end  26 . However, in some embodiments, the second end of the second upper linkage  70   b  may be secured to various other positions along the length of the second inner support member  25 . As shown in the figures, a bracket, fasteners, and/or other connecting devices may be utilized to secure the second end of the second upper linkage  70   b  to the second inner support member  25 . 
     The length of the second upper linkage  70   b  may vary in different embodiments. The figures illustrate an embodiment in which the length of the second upper linkage  70   b  is approximately a quarter of the length of the second upper arm  45 . It should be appreciated that the ratio of lengths between the second upper linkage  70   b  and the second upper arm  45  may vary in different embodiments and thus should not be construed as limited by the exemplary figures. 
     As shown in  FIGS.  13 - 24   , the second upper hinge  71   b  may include a second upper pin  73   b  and the second upper linkage  70   b  may include a second upper slot  72   b . The second upper pin  73   b  may be positioned within the second upper slot  72   b  such that the second upper pin  73   b  may slide within the second upper slot  72   b . A second upper guide member  74   b  may be pivotably connected between the second upper linkage  70   b  and the second upper hinge  71   b , with the second upper guide member  74   b  functioning to guide pivotal movement of the second upper linkage  70   b  with respect to the second upper hinge  71   b.    
     With reference to  FIGS.  13 - 24   , it can be seen that the second lower linkage  75   b  may be comprised of an elongated member including a first end and a second end. The first end of the second lower linkage  75   b  may be pivotably connected to the second lower hinge  76   b  and the second end of the second lower linkage  75   b  may be connected in a non-movable manner to the second inner support member  25  near its lower end  27 . However, in some embodiments, the second end of the second lower linkage  75   b  may be secured to various other positions along the length of the second inner support member  25 . As shown in the figures, a bracket, fasteners, and/or other connecting devices may be utilized to secure the second end of the second lower linkage  75   b  to the second inner support member  25 . 
     The length of the second lower linkage  75   b  may vary in different embodiments. The figures illustrate an embodiment in which the length of the second lower linkage  75   b  is approximately a quarter of the length of the second lower arm  55 . It should be appreciated that the ratio of lengths between the second lower linkage  75   b  and the second lower arm  55  may vary in different embodiments and thus should not be construed as limited by the exemplary figures. 
     As best shown in  FIGS.  13 - 24   , the second lower hinge  76   b  may include a second lower pin  78   b  and the second lower linkage  75   b  may include a second lower slot  77   b . The second lower pin  78   b  may be positioned within the second lower slot  77   b  such that the second lower pin  78   b  may slide within the second lower slot  77   b . A second lower guide member  79   b  may be pivotably connected between the second lower linkage  75   b  and the second lower hinge  76   b , with the second lower guide member  79   b  functioning to guide pivotal movement of the second lower linkage  75   b  with respect to the second lower hinge  76   b.    
     E. Third Exemplary Embodiment (FIGS. 25-36) 
       FIGS.  25 - 36    illustrate a third exemplary embodiment of a folding exercise rack system. As shown in the figures, the third exemplary embodiment includes an exercise rack  11  comprised of a first frame  15  comprised of a first inner support member  20 , a first outer support member  30 , a first upper arm  40  connected near the respective upper ends  21 ,  31  of the first inner support member  20  and the first outer support member  30 , and a first lower arm  50  connected near the respective lower ends  22 ,  32  of the first inner support member  20  and the first outer support member  30 . 
     Continuing to reference  FIGS.  25 - 36   , a second frame  16  is shown in a distally-spaced position along the wall  12  from the first frame  15 . The second frame  16  may comprise a second inner support member  25 , a second outer support member  35 , a second upper arm  45  connected near the respective upper ends  26 ,  36  of the second inner support member  25  and the second outer support member  35 , and a second lower arm  55  connected near the respective lower ends  27 ,  37  of the second inner support member  25  and the second outer support member  35 . 
     As best shown in  FIGS.  25 - 28   , the first and second frames  15 ,  16 , which form an exercise rack  11 , may be interconnected by an inner cross bar  49 . The inner cross bar  49  may be connected between a point near the respective upper ends  21 ,  26  of the first and second inner support members  20 ,  25  as shown in  FIGS.  25 ,  26 ,  29 ,  30 ,  34 , and  35   . However, in other embodiments, the inner cross bar  49  may be positioned at various other positions along the length of the first and second inner support members  20 ,  25 . In other embodiments, the inner cross bar  49  may be omitted entirely (in such embodiments, the first and second frames  15 ,  16  may not be interconnected with each other). 
     Generally, the exercise rack  11  shown in  FIGS.  25 - 36    may be adjusted between an extended position and a retracted (e.g., folded) position. The manner by which the exercise rack  11  is adjusted may vary in different embodiments. As shown in  FIGS.  29 - 32   , the first upper arm  40 , the first lower arm  50 , and the first outer support member  30  are each pivoted inwardly or outwardly about the first inner support member  20 . Similarly, the second upper arm  45 , the second lower arm  55 , and the second outer support member  35  are each pivoted inwardly or outwardly about the second inner support member  25 . 
     In the figures, it is shown that the second upper arm  45 , second lower arm  55 , and second outer support member  35  are pivoted inwardly first, with the first upper arm  40 , first lower arm  50 , and first outer support member  30  being pivoted second to rest upon the first frame  15 . It should be appreciated, however, that the reverse order may be utilized in some embodiments. 
     In the extended position as shown in  FIGS.  25 - 28   , the first upper and lower arms  40 ,  50  are locked in a position perpendicular to the wall  12  and the first outer support member  30  is distally positioned away from the wall  12 . Similarly, in the extended position, the second upper and lower arms  45 ,  55  are locked in a positioned perpendicular to the wall  12  and the second outer support member  35  is distally positioned away from the wall  12 . 
     In the retracted (e.g., folded) position as shown in  FIGS.  33 - 36   , the first upper and lower arms  40 ,  50  are locked in a position parallel to the wall  12  and the first outer support member  30  is positioned adjacent to the wall  12 . Similarly, in the retracted (e.g., folded) position, the second upper and lower arms  45 ,  55  are locked in a position parallel to the wall  12  and the second outer support member  35  is positioned adjacent to the wall  12 . More specifically, it can be seen that, in the retracted (e.g., folded) position, the second outer support member  35 , the second upper arm  45 , and the second lower arm  55  each rest against the inner cross bar  49 . In such a position, the first outer support member  30 , the first upper arm  40 , and the first lower arm  50  each rest against the second upper and lower arms  45 ,  55 . 
       FIGS.  25 - 28    illustrate the exercise rack  11  in an extended position, in which the first and second frames  15 ,  16  are each extended perpendicular to the wall  12  such that the first and second outer support members  30 ,  35  are distally spaced away from the wall  12 . Thus, the upper and lower arms  40 ,  45 ,  50 ,  55  are shown as being each positioned perpendicularly with respect to the wall  12  and the inner cross bar  49 . In such an extended position, the exercise rack  11  is ready for use. 
       FIGS.  29 - 32    illustrate the exercise rack  11  midway through being adjusted into the retracted (e.g., folded) position. As shown, the second upper arm  45 , the second lower arm  55 , and the second outer support member  35  have been pivoted inwardly towards the wall  12 , with the second upper and lower arms  45 ,  55  being parallel to the wall  12 . The first upper arm  40 , the first lower arm  50 , and the first outer support member  30  have not yet been pivoted inwardly, and thus the first upper and lower arms  40 ,  50  remain perpendicular to the wall  12 . 
       FIGS.  33 - 36    illustrate the exercise rack  11  in the retracted (e.g., folded) position. As shown in  FIGS.  33 - 36   , the second outer support member  35 , the second upper arm  45 , and the second lower arm  55  have been pivoted inwardly about the second inner support member  25  to be positioned adjacent to and parallel with respect to the wall  12 , with the second upper arm  45  resting against the inner cross bar  49 . The first outer support member  30 , the first upper arm  40 , and the first lower arm  50  have been pivoted inwardly about the first inner support member  20  to be positioned parallel with respect to the wall  12 , with the first upper arm  40  resting against the second upper arm  45 . Such a position may be desirable when the exercise rack  11  is not in use so as to not take up valuable space in an exercise space (e.g., home gym, garage, exercise studio, or the like). 
     As shown throughout  FIGS.  25 - 36   , the exercise rack  11  itself may be adjustable with respect to the wall  12  between an extended position in which the first inner support member  20  and the second inner support member  25  are distally positioned away from the wall and a retracted position in which the first inner support member  20  and the second inner support member  25  are positioned adjacent to the wall  12 . 
     The manner by which the exercise rack  11  is so adjusted with respect to the wall  12  may vary. In the embodiment shown in  FIGS.  25 - 36   , the inner support members  20 ,  25  are each adapted to be raised into the retracted position and lowered into the extended position. By way of non-limiting example, one or more brackets  90 ,  95  may be connected between the inner support members  20 ,  25  and the wall  12 . 
     As shown in  FIGS.  25 - 36   , the exercise rack  11  may be adjustably connected to the wall  12  by one or more brackets  90 ,  95 . Although the figures illustrate usage of a pair of brackets  90 ,  95 , it should be appreciated that, in some embodiments (e.g., compact embodiments or embodiments utilizing lightweight materials), only a single bracket  90 ,  95  may be utilized. In other embodiments, additional brackets  90 ,  95  (e.g., three, four, five, etc.) may be utilized. 
     In the exemplary embodiment shown in the figures, an upper bracket  90  is connected between the wall  12  and a position at or near the upper ends  21 ,  26  of the inner support members  20 ,  25 . A lower bracket  95  is connected between the wall  12  and the inner support members  20 ,  25  below the upper bracket  90 . Each of the brackets  90 ,  95  are adapted to pivot the exercise rack  11  towards the wall  12  or away from the wall  12 . In the embodiment shown in the figures, the exercise rack  11  is raised into the retracted position and lowered into the extended position. Such an embodiment functions to raise the exercise rack  11  off of the floor  13  when the exercise rack  11  is retracted such as shown in  FIGS.  33 - 36   . 
     The configuration of the brackets  90 ,  95  may vary in different embodiments. In the exemplary embodiment shown in  FIGS.  25 - 36   , the upper bracket  90  is shown as comprising an upper wall mount  94  which is secured to the wall  12  (e.g., by fasteners) and a pair of arms  91   a ,  91   b  which are each pivotably connected between the upper wall mount  94  and the respective inner support members  20 ,  25 . The pair of arms  91   a ,  91   b  may comprise a first arm  91   a  connected near a first side of the upper wall mount  94  and a second arm  91   b  connected near a second side of the upper wall mount  94 . 
     More specifically, it can be seen that a first arm  91   a  is pivotably connected at its first end to the upper wall mount  94  and is pivotably connected at its second end to the first inner support member  20 . Similarly, a second arm  91   b  is pivotably connected at its first end to the upper wall mount  94  and is pivotably connected at its second end to the second inner support member  25 . A first shock  92   a  may be connected between the upper wall mount  94  and the first arm  91   a , and a second shock  92   b  may be connected between the upper wall mount  94  and the second arm  91   b.    
     Continuing to reference  FIGS.  25 - 36   , it can be seen that the lower bracket  95  may comprise a lower wall mount  99  which is secured to the wall  12  (e.g., by fasteners) and a pair of arms  96   a ,  96   b  which are each pivotably connected between the lower wall mount  99  and the respective inner support members  20 ,  25 . The pair of arms  96   a ,  96   b  may be comprised of a first arm  96   a  which is connected near a first side of the lower wall mount  99  and a second arm  96   b  which is connected near a second side of the lower wall mount  99 . 
     The first arm  96   a  may be pivotably connected at its first end to the lower wall mount  99  and at its second end to the first inner support member  20 . Similarly, the second arm  96   b  may be pivotably connected at its first end to the lower wall mount  99  and at its second end to the second inner support member  25 . A first shock  97   a  may be connected between the lower wall mount  99  and the first arm  96   a , and a second shock  97   b  may be connected between the lower wall mount  99  and the second arm  96   b.    
     As shown in  FIGS.  28 - 36   , the respective brackets  90 ,  95  may be pivoted upwardly into the retracted position adjacent to the wall  12 , and pivoted downwardly into the extended position which is distally positioned with respect to the wall  12 . The arms  91   a ,  91   b ,  96   a ,  96   b  may be pivoted upwardly to raise the inner support members  20 ,  25  (and thus the exercise rack  11 ) into the retracted position adjacent to the wall  12 , such as for storage. The arms  91   a ,  91   b ,  96   a ,  96   b  may conversely be pivoted downwardly to lower the inner support members  20 ,  25  (and thus the exercise rack  11 ) into the extended position away from the wall  12 , ready for use. The shocks  92   a ,  92   b ,  97   a ,  97   b , which may be comprised of various devices such as actuators and the like, may aid in raising and lowering the exercise rack  11 . 
     As shown throughout the figures, the exercise rack  11  may comprise various openings  18  for attachment of various brackets, attachments, locking devices, and the like. The openings  18  may be positioned on various portions of the exercise rack  11 , such as but not limited to the inner support members  20 ,  25 , outer support members  30 ,  35 , upper arms  40 ,  45 , lower arms  50 ,  55 , inner cross bar  49 , and/or brackets  90 ,  95 . 
     As shown in  FIGS.  25 - 36   , each of the upper and lower arms  40 ,  45 ,  50 ,  55  may be pivotably secured to a respective inner support member  20 ,  25  by one or more hinges  71   a ,  71   b ,  76   a ,  76   b . Various types of hinges may be utilized, and thus the exemplary embodiment shown in the figures should not be construed as limiting in scope. 
     In the exemplary embodiment best shown in  FIGS.  25 - 36   , the hinges  71   a ,  71   b ,  76   a ,  76   b  are each illustrated as comprising a U-shaped bracket, with a pin extending through both the bracket and the respective upper or lower arm  40 ,  45 ,  50 ,  55  which is pivotably connected to the respective inner support member  20 ,  25 . Locking members  85   a ,  85   b ,  86   a ,  86   b  may be utilized to releasably lock each of the arms  40 ,  45 ,  50 ,  55  in either the extended or retracted (e.g., folded) positions as discussed below. 
     As shown in  FIGS.  29 - 32   , the first upper arm  40  is pivotably connected at its first end  41  to the outer side  24  of the first inner support member  20  and fixedly (e.g., non-movably) connected at its second end  42  to the inner side  33  of the first outer support member  30 . Thus, the first upper arm  40  may be pivoted about the first inner support member  20 , with the first outer support member  30  similarly pivoting along with the first upper arm  40 . 
     The manner by which the first upper arm  40  is pivotably connected to the first inner support member  20  may vary in different embodiments. In the embodiment shown in  FIGS.  25 - 36   , it can be seen that a first upper hinge  71   a  may be utilized. In such an embodiment, the first upper hinge  71   a  is connected at or near an upper end  21  of the outer side  24  of the first inner support member  20 . 
     The first upper hinge  71   a  includes a pin or other elongated member which extends through the first upper arm  40  such that the first upper arm  40  may pivot about the pin. Separately, a first upper locking member  85   a  may be selectively inserted through both the first upper hinge  71   a  and the first upper arm  40  to releasably lock the first upper arm  40  in the extended position as shown in  FIGS.  33 - 36   . The first upper locking member  85   a  may comprise a pin or other elongated member such as shown in the figures. The first upper locking member  85   a  may be anchored to the first upper hinge  71   a , such as by a cord or the like, such that the first upper locking member  85   a  remains anchored to the first upper hinge  71   a  even when the first upper arm  40  is not in the extended position. 
     As best shown in  FIGS.  25 - 36   , the second upper arm  45  is pivotably connected at its first end  46  to the outer side  29  of the second inner support member  25  and fixedly (e.g., non-movably) connected at its second end  47  to the inner side  38  of the second outer support member  35 . Thus, the second upper arm  45  may be pivoted about the second inner support member  25 , with the second outer support member  35  similarly pivoting along with the second upper arm  45 . 
     The manner by which the second upper arm  45  is pivotably connected to the second inner support member  25  may vary in different embodiments. In the embodiment shown in  FIGS.  25 - 36   , it can be seen that a second upper hinge  71   b  may be utilized. In such an embodiment, the second upper hinge  71   b  is connected at or near an upper end  26  of the outer side  29  of the second inner support member  25 . 
     The second upper hinge  71   b  includes a pin or other elongated member which extends through the second upper arm  45  such that the second upper arm  45  may pivot about the pin. Separately, a second upper locking member  85   b  may be selectively inserted through both the second upper hinge  71   b  and the second upper arm  45  to releasably lock the second upper arm  45  in the extended position as shown in  FIGS.  33 - 36   . The second upper locking member  85   b  may comprise a pin or other elongated member such as shown in the figures. The second upper locking member  85   b  may be anchored to the second upper hinge  71   b , such as by a cord or the like, such that the second upper locking member  85   b  remains anchored to the second upper hinge  71   b  even when the second upper arm  45  is not in the extended position. 
     As best shown in  FIGS.  29 - 32   , the first lower arm  50  is pivotably connected at its first end  51  to the outer side  24  of the first inner support member  20  and fixedly (e.g., non-movably) connected at its second end  52  to the inner side  33  of the first outer support member  30 . Thus, the first lower arm  50  may be pivoted about the first inner support member  20 , with the first outer support member  30  similarly pivoting along with the first lower arm  50 . The first lower arm  50  is illustrated as being connected between the first inner and outer support members  20 ,  30  below the first upper arm  40 . 
     The manner by which the first lower arm  50  is pivotably connected to the first inner support member  20  may vary in different embodiments. In the embodiment shown in  FIGS.  25 - 36   , it can be seen that a first lower hinge  76   a  may be utilized. In such an embodiment, the first lower hinge  76   a  is connected at or near an upper end  21  of the outer side  24  of the first inner support member  20 . 
     The first lower hinge  76   a  includes a pin or other elongated member which extends through the first lower arm  50  such that the first lower arm  50  may pivot about the pin. Separately, a first lower locking member  86   a  may be selectively inserted through both the first lower hinge  76   a  and the first lower arm  50  to releasably lock the first lower arm  50  in the extended position as shown in  FIGS.  33 - 36   . The first lower locking member  86   a  may comprise a pin or other elongated member such as shown in the figures. The first lower locking member  86   a  may be anchored to the first lower hinge  76   a , such as by a cord or the like, such that the first lower locking member  86   a  remains anchored to the first lower hinge  76   a  even when the first lower arm  50  is not in the extended position. 
     As shown in  FIGS.  25 - 36   , the second lower arm  55  is pivotably connected at its first end  56  to the outer side  29  of the second inner support member  25  and fixedly (e.g., non-movably) connected at its second end  57  to the inner side  38  of the second outer support member  35 . Thus, the second lower arm  55  may be pivoted about the second inner support member  25 , with the second outer support member  35  similarly pivoting along with the second lower arm  55 . The second lower arm  55  is illustrated as being connected between the second inner and outer support members  25 ,  35  below the second upper arm  45 . 
     The manner by which the second lower arm  55  is pivotably connected to the second inner support member  25  may vary in different embodiments. In the embodiment shown in  FIGS.  25 - 36   , it can be seen that a second lower hinge  76   b  may be utilized. In such an embodiment, the second lower hinge  76   b  is connected at or near an upper end  26  of the outer side  29  of the second inner support member  25 . 
     The second lower hinge  76   b  includes a pin or other elongated member which extends through the second lower arm  55  such that the second lower arm  55  may pivot about the pin. Separately, a second lower locking member  86   b  may be selectively inserted through both the second lower hinge  76   b  and the second lower arm  55  to releasably lock the second lower arm  55  in the extended position as shown in  FIGS.  33 - 36   . The second lower locking member  86   b  may comprise a pin or other elongated member such as shown in the figures. The second lower locking member  86   b  may be anchored to the second lower hinge  76   b , such as by a cord or the like, such that the second lower locking member  86   b  remains anchored to the second lower hinge  76   b  even when the second lower arm  55  is not in the extended position. 
     F. Fourth Exemplary Embodiment (FIGS.  37 - 48 ) 
       FIGS.  37 - 48    illustrate a fourth exemplary embodiment of a folding exercise rack system. It should be readily apparent from the figures that the fourth exemplary embodiment is substantially the same as the third exemplary embodiment with some variations, e.g., in the manner by which the fourth exemplary embodiment is adjustably secured to the wall  12 . Thus, the preceding section covering the third exemplary embodiment and describing its constituent structures is hereby incorporated by reference into this section. 
     As shown in  FIGS.  37 - 48   , an exemplary embodiment may be adjustably connected to the wall  12  by usage of a plurality of scissor connectors  101   a ,  101   b ,  106   a ,  106   b  such that the exercise rack  11  may be adjusted between at least two positions with respect to the wall  12 . As shown, the exercise rack  11  may be adjustable between an extended position and a retracted position. In the extended position, the inner support members  20 ,  25  are distally positioned away from the wall  12 . In the retracted position, the inner support members  20 ,  25  are positioned adjacent to the wall  12 . In such an embodiment, the exercise rack  11  may be adjusted only horizontally, without any vertical movement. However, in some embodiments, the exercise rack  11  may also be adjusted vertically. 
     Continuing to reference  FIGS.  37 - 48   , it can be seen that a plurality of scissor connectors  101   a ,  101   b ,  106   a ,  106   b  are utilized to adjustably connect the exercise rack  11  to the wall  12 . In the exemplary embodiment shown in the figures, the plurality of scissor connectors  101   a ,  101   b ,  106   a ,  106   b  are connected between the inner support members  20 ,  25  and the wall  12 . 
     While the figures illustrate the usage of four scissor connectors  101   a ,  101   b ,  106   a ,  106   b , with each of the inner support members  20 ,  25  being connected to a pair of scissor connectors  101   a ,  101   b ,  106   a ,  106   b , it should be appreciated that more or less scissor connectors  101   a ,  101   b ,  106   a ,  106   b  may be utilized in different embodiments. By way of example, a pair of scissor connectors  101   a ,  101   b  may be utilized, with each inner support member  20 ,  25  being connected to only one scissor connector  101   a ,  101   b ,  106   a ,  106   b . As a further example, only a single scissor connector  101   a ,  101   b ,  106   a ,  106   b  could be utilized in some embodiments. In yet other embodiments, five or more scissor connectors  101   a ,  101   b ,  106   a ,  106   b  may be utilized. 
     In the exemplary embodiment best shown in  FIGS.  37 - 48   , a first pair of scissor connectors  101   a ,  106   a  are connected between the first inner support member  20  and the wall  12 , and a second pair of scissor connectors  101   b ,  106   b  are connected between the second inner support member  25  and the wall  12 . More specifically, a first upper scissor connector  101   a  and a first lower scissor connector  106   a  are each connected between the wall  12  and the first inner support member  20 . Similarly, a second upper scissor connector  101   b  and a second lower scissor connector  106   b  are each connected between the wall  12  and the second inner support member  25 . 
     As shown in  FIGS.  37 - 48   , the first upper scissor connector  101   a  is connected between the first inner support member  20  and the wall  12 . In the exemplary embodiment shown in the figures, the first upper scissor connector  101   a  is connected to the inner side  23  of the first inner support member  20  near its upper end  21 , just below the first upper hinge  71   a . However, it should be appreciated that the first upper scissor connector  101   a  may be connected to various other positions along the length of the first inner support member  20 . 
     The first upper scissor connector  101   a  is illustrated as comprising a first upper wall mount  100   a , a first connector  102   a , and a second connector  103   a . The first upper wall mount  100   a  may comprise a bracket or other structure (e.g., a plate member) which may be secured to the wall  12 , such as by fasteners or the like. The first connector  102   a  is pivotably connected at its first end to the first upper wall mount  100   a , such as by use of a hinge or other pivoting device. The second connector  103   a  is pivotably connected at its first end to the second end of the first connector  102   a , and pivotably connected at its second end to the first inner support member  20 , such as by usage of a pivot pin or the like. A first upper shock  92   a  may be connected between the first upper wall mount  100   a  and the first connector  102   a  to smoothen and/or assist with adjustment. 
     As best shown in  FIGS.  37 - 48   , the first upper scissor connector  101   a  is adapted to adjust inwardly towards the wall  12  by pivoting both the first and second connectors  102   a ,  103   a  upwardly and towards each other.  FIGS.  37 - 40    illustrates the first upper scissor connector  101   a  in an extended position, in which the first and second connectors  102   a ,  103   a  of the first upper scissor connector  101   a  are linearly aligned in a horizontal (e.g., parallel to the floor  13 , perpendicular to the wall  12 ) orientation.  FIGS.  41 - 48    illustrate the first upper scissor connector  101   a  in a retracted position, in which the first and second connectors  102   a ,  103   a  of the first upper scissor connector  101   a  are drawn together towards each other in a vertical (e.g., perpendicular to the floor  13 , parallel to the wall  12 ) orientation. 
     As shown in  FIGS.  37 - 48   , the first lower scissor connector  106   a  is connected between the first inner support member  20  and the wall  12 , below the first upper scissor connector  101   a . In the exemplary embodiment shown in the figures, the first lower scissor connector  106   a  is connected to the inner side  23  of the first inner support member  20  near its lower end  22 , just above the first lower hinge  76   a . However, it should be appreciated that the first lower scissor connector  106   a  may be connected to various other positions along the length of the first inner support member  20 . 
     The first lower scissor connector  106   a  is illustrated as comprising a first lower wall mount  105   a , a first connector  107   a , and a second connector  108   a . The first lower wall mount  105   a  may comprise a bracket or other structure (e.g., a plate member) which may be secured to the wall  12 , such as by fasteners or the like. The first connector  107   a  is pivotably connected at its first end to the first lower wall mount  105   a , such as by use of a hinge or other pivoting device. The second connector  108   a  is pivotably connected at its first end to the second end of the first connector  107   a , and pivotably connected at its second end to the first inner support member  20 , such as by usage of a pivot pin or the like. A first lower shock  97   a  may be connected between the first lower wall mount  105   a  and the first connector  107   a  to smoothen and/or assist with adjustment. 
     As best shown in  FIGS.  37 - 48   , the first lower scissor connector  106   a  is adapted to adjust inwardly towards the wall  12  by pivoting both the first and second connectors  107   a ,  108   a  upwardly and towards each other.  FIGS.  41 - 48    illustrate the first lower scissor connector  106   a  in an extended position, in which the first and second connectors  107   a ,  108   a  of the first lower scissor connector  106   a  are linearly aligned in a horizontal (e.g., parallel to the floor  13 , perpendicular to the wall  12 ) orientation.  FIGS.  45 - 48    illustrate the first lower scissor connector  106   a  in a retracted position, in which the first and second connectors  107   a ,  108   a  of the first lower scissor connector  106   a  are drawn together towards each other in a vertical (e.g., perpendicular to the floor  13 , parallel to the wall  12 ) orientation. 
     As shown in  FIGS.  37 - 48   , the second upper scissor connector  101   b  is connected between the second inner support member  25  and the wall  12 . In the exemplary embodiment shown in the figures, the second upper scissor connector  101   b  is connected to the inner side  28  of the second inner support member  25  near its upper end  26 , just below the second upper hinge  71   b . However, it should be appreciated that the second upper scissor connector  101   b  may be connected to various other positions along the length of the second inner support member  25 . 
     The second upper scissor connector  101   b  is illustrated as comprising a second upper wall mount  100   b , a first connector  102   b , and a second connector  103   b . The second upper wall mount  100   b  may comprise a bracket or other structure (e.g., a plate member) which may be secured to the wall  12 , such as by fasteners or the like. The first connector  102   b  is pivotably connected at its first end to the second upper wall mount  100   b , such as by use of a hinge or other pivoting device. The second connector  103   b  is pivotably connected at its first end to the second end of the first connector  102   b , and pivotably connected at its second end to the second inner support member  25 , such as by usage of a pivot pin or the like. A second upper shock  92   b  may be connected between the second upper wall mount  100   b  and the first connector  102   b  to smoothen and/or assist with adjustment. 
     As shown in  FIGS.  37 - 48   , the second upper scissor connector  101   b  is adapted to adjust inwardly towards the wall  12  by pivoting both the first and second connectors  102   b ,  103   b  upwardly and towards each other.  FIGS.  37 - 40    illustrate the second upper scissor connector  101   b  in an extended position, in which the first and second connectors  102   b ,  103   b  of the second upper scissor connector  101   b  are linearly aligned in a horizontal (e.g., parallel to the floor  13 , perpendicular to the wall  12 ) orientation.  FIGS.  41 - 48    illustrate the second upper scissor connector  101   b  in a retracted position, in which the first and second connectors  102   b ,  103   b  of the second upper scissor connector  101   b  are drawn together towards each other in a vertical (e.g., perpendicular to the floor  13 , parallel to the wall  12 ) orientation. 
     As shown in  FIGS.  37 - 48   , the second lower scissor connector  106   b  is connected between the second inner support member  25  and the wall  12 , below the second upper scissor connector  101   b . In the exemplary embodiment shown in the figures, the second lower scissor connector  106   b  is connected to the inner side of the second inner support member  25  near its lower end  27 , just above the second lower hinge  76   b . However, it should be appreciated that the second lower scissor connector  106   b  may be connected to various other positions along the length of the second inner support member  25 . 
     The second lower scissor connector  106   b  is illustrated as comprising a second lower wall mount  105   b , a first connector  107   b , and a second connector  108   b . The second lower wall mount  105   b  may comprise a bracket or other structure (e.g., a plate member) which may be secured to the wall  12 , such as by fasteners or the like. The first connector  107   b  is pivotably connected at its first end to the second lower wall mount  105   b , such as by use of a hinge or other pivoting device. The second connector  108   b  is pivotably connected at its first end to the second end of the first connector  107   b , and pivotably connected at its second end to the second inner support member  25 , such as by usage of a pivot pin or the like. A second lower shock  97   b  may be connected between the second lower wall mount  105   b  and the first connector  107   b  to smoothen and/or assist with adjustment. 
     As best shown in  FIGS.  41 - 44   , the second lower scissor connector  106   b  is adapted to adjust inwardly towards the wall  12  by pivoting both the first and second connectors  107   b ,  108   b  upwardly and towards each other.  FIGS.  37 - 40    illustrate the second lower scissor connector  106   b  in an extended position, in which the first and second connectors  107   b ,  108   b  of the second lower scissor connector  106   b  are linearly aligned in a horizontal (e.g., parallel to the floor  13 , perpendicular to the wall  12 ) orientation.  FIGS.  41 - 48    illustrate the second lower scissor connector  106   b  in a retracted position, in which the first and second connectors  107   b ,  108   b  of the second lower scissor connector  106   b  are drawn together towards each other in a vertical (e.g., perpendicular to the floor  13 , parallel to the wall  12 ) orientation. 
     As best shown in  FIGS.  37 - 48   , one or more wheels  88   a ,  88   b  may be connected to the exercise rack  11  to aid in and smoothen movement of the exercise rack  11  when being adjusted inwardly or outwardly with respect to the wall  12 , or when being collapsed or folded. While wheels  88   a ,  88   b  are only shown in use with the fourth exemplary embodiment shown in  FIGS.  37 - 48   , it should be appreciated that wheels  88   a ,  88   b  may be utilized with any of the other embodiments described or shown herein. 
     In the exemplary embodiment shown in  FIGS.  37 - 48   , it can be seen that a first wheel  88   a  is connected to the lower end  22  of the first inner support member  20  and that a second wheel  88   b  is connected to the lower end  27  of the second inner support member  25 . Although not shown, it should be appreciated that additional or alternate wheels may be positioned on the lower ends  32 ,  37  of the outer support members  30 ,  35  in some embodiments. Various types of wheels  88   a ,  88   b  may be utilized, such as but not limited to caster wheels. The wheels  88   a ,  88   b  may be pivotably or rotatably connected to the support members  20 ,  25 ,  30 ,  35 , or may be fixed so as to allow movement only towards or away from the wall  12 . 
     G. Operation of Exemplary Embodiments 
     In use, the exercise rack  11  is both adjustable with respect to the wall  12  and foldable into a compact, folded position. The manner by which the exercise rack  11  is adjusted in both respects may vary in different embodiments. It should be appreciated that any combination of adjustment methods and/or devices shown in the figures may be utilized in different embodiments. By way of example, the scissor connectors  101   a ,  101   b ,  106   a ,  106   b  of the embodiment shown in  FIGS.  37 - 48    could be utilized in combination with any of the embodiments shown in  FIGS.  1 - 36   . 
     Generally, the exercise rack  11  may be adjustable by grasping various portions of the exercise rack  11  and applying force (e.g., pivotable or rotational force). In the embodiments shown in  FIGS.  1 - 12  and  25 - 48   , the exercise rack  11  may be adjusted between positions adjacent to and distally spaced away from the wall  12  by, generally, grasping different portions of the exercise rack  11  and applying force in the desired direction of movement. 
     In each of the exemplary embodiments shown in the figures, the exercise rack  11  may be folded into a compact state, with the outer support members  30 , being adjusted inwardly towards the wall  12 . In the exemplary embodiment shown in  FIGS.  25 - 48   , the upper and lower arms  40 ,  45 ,  50 ,  55  may be pivoted inwardly about the inner support members  20 ,  25 . In the exemplary embodiment shown in  FIGS.  1 - 12   , the outer support members  30 ,  35  may be slid or otherwise moved towards the inner support members  20 ,  25 , with the upper and lower arms  40 ,  45 ,  50 ,  55  pivoting inwardly towards a respective folded outer support member  30 ,  35 . 
     i. Operation of First Exemplary Embodiment ( FIGS.  1 - 12   ). 
     In use, the exemplary embodiment shown in  FIGS.  1 - 12    may be adjusted with respect to the wall  12  by grasping any portion of the exercise rack  11 , e.g., the inner support members  20 ,  25 , the outer support members  30 ,  35 , the upper arms  40 ,  45 , the lower arms  50 ,  55 , the cross bar  80 , and/or the inner cross bar  49 , and applying upward or downward force. 
     When upward force is applied to any portion of the exercise rack  11 , the upper and lower brackets  90 ,  95  will pivot upwardly towards the wall  12 , thus causing the exercise rack  11  to be similarly drawn upwardly and towards the wall such as shown in  FIGS.  5 - 8   . The arms  91   a ,  91   b ,  96   a ,  96   b  of the upper and lower brackets  90 ,  95  will pivot with respect to the upper and lower wall mounts  94 ,  99 , and the inner support members  20 ,  25  will pivot with respect to the arms  91   a ,  91   b ,  96   a ,  96   b . In this manner, the exercise rack  11  may be adjusted inwardly and upwardly towards the wall  12 , whether in its expanded or retracted (e.g., collapsed, folded) position. 
     When downward force is applied to any portion of the exercise rack  11 , the upper and lower brackets  90 ,  95  will pivot downwardly away from the wall  12 , thus causing the exercise rack  11  to be similarly drawn downwardly and away from the wall  12 . The arms  91   a ,  91   b ,  96   a ,  96   b  of the upper and lower brackets  90 ,  95  will pivot with respect to the upper and lower wall mounts  94 ,  99  and the inner support members  20 ,  25  will pivot with respect to the arms  91   a ,  91   b ,  96   a ,  96   b . In this manner, the exercise rack  11  may be adjusted outwardly and downwardly away from the wall  12 , whether in its expanded or retracted (e.g., collapsed, folded) position. 
     As best shown in  FIG.  6   , the brackets  90 ,  95  may include shocks  92   a ,  92   b ,  97   a ,  97   b  such as actuators or the like which may aid the user in adjusting the exercise rack  11  with respect the wall  12 . The shocks  92   a ,  92   b ,  97   a ,  97   b  may comprise actuators or other devices known to aid movement of objects. In some embodiments, the shocks  92   a ,  92   b ,  97   a ,  97   b  may be adapted to automatically adjust the brackets  90 ,  95  without user force being applied. In such embodiments, various input devices such as buttons, remote controllers, and the like may be utilized to adjust the exercise rack  11 . In other embodiments, the exercise rack  11  may still be manually adjustable (e.g., by manual force applied by the user), with the shocks  92   a ,  92   b ,  97   a ,  97   b  functioning to aid adjustment (e.g., by reducing the force necessary). 
     Additionally, the exercise rack  11  may be collapsed or folded in on itself as shown in  FIGS.  9 - 12   . To collapse the exercise rack  11 , the upper and lower locking members  85   a ,  85   b ,  86   a ,  86   b  may first be removed from extending through the upper and lower brackets  120   a ,  120   b ,  125   a ,  125   b . The user may then apply inward force to the outer support members  30 ,  35 , which traverse along the upper and lower arms  40 ,  45 ,  50 ,  55  towards the inner support members  20 ,  25 . The inward force may be applied, for example, by grasping and pushing on the outer support members  30 ,  35 . The force may be ceased upon the outer support members  30 ,  35  being pressed against the inner support members  20 ,  25 . 
     To complete folding or collapsing the exercise rack  11 , the upper and lower arms  40 ,  45 ,  50 ,  55  will be pivoted inwardly to rest against the respective outer support members  30 ,  35 . In some embodiments, the upper and lower arms  40 ,  45 ,  55 ,  55  may pivot automatically as the outer support members  30 ,  35  are pushed inwardly. In other embodiments, the upper and lower arms  40 ,  45 ,  50 ,  55  may be separately pivoted inwardly after the outer support members  30 ,  35  have been pushed in. 
     As shown in  FIGS.  5 - 8   , the first upper arm  40  pivots downwardly and inwardly towards the first outer support member  30 , the second upper arm  45  pivots downwardly and inwardly towards the second outer support member  35 , the first lower arm  50  pivots upwardly and inwardly towards the first outer support member  30 , and the second lower arm  55  pivots upwardly and inwardly towards the second outer support member  35 . 
     The exercise rack  11  may be locked in the collapsed or folded position such as shown in  FIGS.  9 - 12   . In the illustrated exemplary embodiment, the upper and lower locking members  85   a ,  85   b ,  86   a ,  86   b  may be engaged to lock the upper and lower arms  40 ,  45 ,  50 ,  55  in position against the outer support members  30 ,  35 , parallel to the wall  12 . More specifically, the first upper locking member  85   a  may be inserted through adjacent openings  18  in the first upper bracket  120   a  and the first outer support member  30 , the second upper locking member  85   b  may be inserted through adjacent openings  18  in the second upper bracket  120   b  and the second outer support member  35 , the first lower locking member  86   a  may be inserted through adjacent openings  18  in the first lower bracket  125   a  and the first outer support member  30 , and the second lower locking member  86   b  may be inserted through adjacent openings  18  in the second lower bracket  125   b  and the second outer support member  35 . 
     When desired, the exercise rack  11  may be extended (e.g., unfolded) back to its extended position. The locking members  85   a ,  85   b ,  86   a ,  86   b  are first removed by pulling them outwardly. The upper arms  40 ,  45  are pivoted outwardly and upwardly to extend perpendicular to the wall  12  and the lower arms  50 ,  55  are pivoted outwardly and downwardly to extend perpendicular to the wall  12 . The outer support members  30 ,  35  are pulled outwardly to traverse between the upper and lower arms  40 ,  45 ,  50 ,  55 , and the locking members  85   a ,  85   b ,  86   a ,  86   b  are repositioned in their locked positions between the upper and lower arms  40 ,  45 ,  50 ,  55  and the outer support members  30 ,  35 . 
     ii. Operation of Second Exemplary Embodiment ( FIGS.  13 - 24   ). 
     In use, the second exemplary embodiment shown in  FIGS.  13 - 24    may be collapsed or folded in on itself as shown in  FIGS.  21 - 24   . To collapse the exercise rack, the cross bar  80  is first removed. The cross bar  80  may be stored separately, or may be removably connected to various portions of the exercise rack  11 , such as but not limited to the inner support members  20 , 25  or outer support members  30 ,  35 . In the exemplary embodiment shown in the figures, the cross bar  80  is removably secured to the outer side  39  of the second outer support member  35 . 
     As shown in  FIGS.  17 - 20   , the frames  15 ,  16  of the exercise rack  11  may be individually pivoted inwardly towards the wall  12 . A user may first grasp the first outer support member  30 , or the first upper and lower arms  40 ,  50 , and pivot the first frame  15  inwardly towards the wall  12 . The first frame  15 , including the first inner support member  20 , first outer support member  30 , first upper arm  40 , and first lower arm  50 , pivot with respect to the first upper hinge  71   a  and first lower hinge  76   a . When fully collapsed or folded, the first frame  15  rests against the wall  12  such as shown in  FIGS.  21 - 24   . 
     After collapsing or folding the first frame  15 , the second frame  16  may similarly be collapsed or folded by grasping the second outer support member  35 , or the second upper and lower arms  45 ,  55 , and pivoting the second frame  16  inwardly towards the wall  12 . The second frame  16 , including the second inner support member  25 , second outer support member  35 , second upper arm  45 , and second lower arm  55 , pivot with respect to the second upper hinge  71   b  and second lower hinge  76   b . When fully collapsed or folded, the second frame  16  rests against the first frame  15  such as shown in  FIGS.  21 - 24   . However, it should be appreciated that, in some embodiments, the reverse order may be utilized (e.g., the second frame  16  is folded first). 
     To extend the exercise rack  11 , the reverse steps may be performed. The second frame  16  may be grasped at various locations and pivoted outwardly to be perpendicular to the wall  12 . The first frame  15  then may be grasped at various locations and pivoted outwardly to be perpendicular to the wall  12  and parallel to the second frame  16 . The cross bar  80  may be removed and then secured between the outer support members  30 ,  35 . The exercise rack  11  is then ready for use. 
     iii. Operation of Third and Fourth Exemplary Embodiments ( FIGS.  25 - 48   ). 
     In use, the exemplary embodiment shown in  FIGS.  25 - 36    and the exemplary embodiment shown in  FIGS.  37 - 48    are both adjustable with respect to the wall  12  and foldable into a retracted (e.g., compact, folded) position. Both exemplary embodiments are adjustable with respect to the wall  12  in different manners, while collapsing in the same manner. 
     The embodiment shown in  FIGS.  25 - 36    is illustrated as being adjustably connected to the wall  12  by one or more brackets  90 ,  95 , each comprising a wall mount  94 ,  99  and a pair of arms  91   a ,  91   b ,  96   a ,  96   b  pivotably connected between the wall mount  94 ,  99  and an inner support member  20 ,  25 . The embodiment shown in  FIGS.  37 - 48    is illustrated as being adjustably connected to the wall  12  by a plurality of scissor connectors  101   a ,  101   b ,  106   a ,  106   b , each comprising a wall mount  100   a ,  100   b ,  105   a ,  105   b , a first connector  102   a ,  102   b ,  107   a ,  107   b  pivotably connected to the wall mount  100   a ,  100   b ,  105   a ,  105   b , and a second connector  103   a ,  103   b ,  108   a ,  108   b  pivotably connected between the first connector  102   a ,  102   b ,  107   a ,  107   b  and an inner support member  20 ,  25 . 
     The exemplary embodiment shown in  FIGS.  25 - 36    may be adjusted with respect to the wall  12  by grasping any portion of the exercise rack  11 , e.g., the inner support members  20 ,  25 , the outer support members  30 ,  35 , the upper arms  40 ,  45 , the lower arms  50 ,  55 , the cross bar  80 , and/or the inner cross bar  49 , and applying upward or downward force. 
     When upward force is applied to any portion of the exercise rack  11 , the upper and lower brackets  90 ,  95  will pivot upwardly towards the wall  12 , thus causing the exercise rack  11  to be similarly drawn upwardly and towards the wall  12  such as shown in  FIGS.  25 - 48   . The arms  91   a ,  91   b ,  96   a ,  96   b  of the upper and lower brackets  90 ,  95  will pivot with respect to the upper and lower wall mounts  94 ,  99 , and the inner support members  20 ,  25  will pivot with respect to the arms  91   a ,  91   b ,  96   a ,  96   b . In this manner, the exercise rack  11  may be adjusted inwardly and upwardly towards the wall  12 , whether in its expanded or retracted (e.g., collapsed, folded) position. 
     When downward force is applied to any portion of the exercise rack  11 , the upper and lower brackets  90 ,  95  will pivot downwardly away from the wall  12 , thus causing the exercise rack  11  to be similarly drawn downwardly and away from the wall  12  such as shown in  FIGS.  25 - 48   . The arms  91   a ,  91   b ,  96   a ,  96   b  of the upper and lower brackets  90 ,  95  will pivot with respect to the upper and lower wall mounts  94 ,  99  and the inner support members  20 ,  25  will pivot with respect to the arms  91   a ,  91   b ,  96   a ,  96   b . In this manner, the exercise rack  11  may be adjusted outwardly and downwardly away from the wall  12 , whether in its expanded or retracted (e.g., collapsed, folded) position. 
     As best shown in  FIGS.  34 ,  38 ,  42 , and  46    the brackets  90 ,  95  may include shocks  92   a ,  92   b ,  97   a ,  97   b  such as actuators or the like which may aid the user in adjusting the exercise rack  11  with respect the wall  12 . The shocks  92   a ,  92   b ,  97   a ,  97   b  may comprise actuators or other devices known to aid movement of objects. In some embodiments, the shocks  92   a ,  92   b ,  97   a ,  97   b  may be adapted to automatically adjust the brackets  90 ,  95  without user force being applied. In such embodiments, various input devices such as buttons, remote controllers, and the like may be utilized to adjust the exercise rack  11 . In other embodiments, the exercise rack  11  may still be manually adjustable (e.g., by manual force applied by the user), with the shocks  92   a ,  92   b ,  97   a ,  97   b  functioning to aid adjustment (e.g., by reducing the force necessary). 
     Both the embodiment shown in  FIGS.  25 - 36    and the embodiment shown in  FIGS.  37 - 48    are collapsible in the same manner. To collapse the exercise rack  11 , the cross bar  80  is first removed. The cross bar  80  may be stored separately, or may be removably connected to various portions of the exercise rack  11 , such as but not limited to the inner support members  20 , 25  or outer support members  30 ,  35 . In the exemplary embodiment shown in the figures, the cross bar  80  is removably secured to the outer side  39  of the second outer support member  35 . 
     In the embodiments shown in  FIGS.  25 - 48   , it can be seen that each of the frames  15 ,  16  is pivotable about the inner support member  20 ,  25  through use of a plurality of hinges  71   a ,  71   b ,  76   a ,  76   b . In the illustrated embodiments, the second frame  16  is illustrated as being pivoted inwardly first, followed by the first frame  15 . It should be appreciated, however, that the reverse order may be utilized in some embodiments (e.g., the first frame  15  is pivoted inwardly first). 
     To collapse the embodiments shown in  FIGS.  25 - 48   , a user will first release the locking members  85   a ,  85   b ,  86   a ,  86   b  to unlock the frames  15 ,  16 . The first upper and lower locking members  85   a ,  86   a  are thus removed from engagement with the first ends  41 ,  51  of the first upper and lower arms  40 ,  50 , allowing the first upper and lower arms  40 ,  50  to freely pivot about the first upper and lower hinges  71   a ,  76   a . Similarly, the second upper and lower locking members  86   b ,  86   b  are removed from engagement with the first ends  46 ,  56  of the second upper and lower arms  45 ,  55  to freely pivot about the second upper and lower hinges  71   b ,  76   b.    
     The user may then grasp a portion of the second frame  16 , such as the second outer support member  35 , the second upper arm  45 , and/or the second lower arm  55 , and pivot inwardly towards the wall  12  until the second outer support member  35  is positioned adjacent to the wall  12  and the inner cross bar  49 , with the upper and lower arms  45 ,  55  being parallel to the wall  12  and to the inner cross bar  49 . 
     With the second frame  16  pivoted inwardly towards the wall  12 , the user may grasp a portion of the first frame  15 , such as the first outer support member  30 , the first upper arm  40 , and/or the first lower arm  50 , and pivot inwardly towards the wall  12  until the first outer support member  30  is positioned adjacent to the wall  12  and the second frame  16 , with the first upper and lower arms  40 ,  50  being parallel to the wall  12 , the inner cross bar  49 , and the second upper and lower arms  45 ,  55 . As shown in  FIGS.  36  and  48   , the first frame  15  will thus rest against the second frame  16 . 
     When desired, the exercise rack  11  may be extended (e.g., unfolded) back to its extended position. The user may first grasp the first frame  15  and pivot outwardly away from the wall  12  until the first upper and lower arms  40 ,  50  are perpendicular to the wall  12 . The first upper and lower locking members  85   a ,  86   a  may be inserted through both the first upper and lower hinges  71   a ,  76   a  and the first upper and lower arms  40 ,  50  to lock the first frame  15  in the extended position. 
     The user may then grasp the second frame  16  and pivot outwardly away from the wall  12  until the second upper and lower arms  45 ,  55  are perpendicular to the wall  12 . The second upper and lower locking members  85   b ,  86   b  may be inserted through both the second upper and lower hinges  71   b ,  76   b  and the second upper and lower arms  45 ,  55  to lock the second frame  16  in the extended position. The cross bar  80  may be connected between the outer support members  30 ,  35 . The exercise rack  11  is then ready for use. 
     Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Although methods and materials similar to or equivalent to those described herein can be used in the practice or testing of the various embodiments of the present disclosure, suitable methods and materials are described above. All patent applications, patents, and printed publications cited herein are incorporated herein by reference in their entireties, except for any definitions, subject matter disclaimers or disavowals, and except to the extent that the incorporated material is inconsistent with the express disclosure herein, in which case the language in this disclosure controls. The various embodiments of the present disclosure may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it is therefore desired that the various embodiments in the present disclosure be considered in all respects as illustrative and not restrictive. Any headings utilized within the description are for convenience only and have no legal or limiting effect.