Patent Publication Number: US-10328298-B2

Title: Chair-based workout apparatus and methods

Description:
CROSS-REFERENCES TO RELATED APPLICATIONS 
     This application is a continuation-in-part of U.S. patent application Ser. No. 14/704,173 filed May 5, 2015 by Craig A. VanHorn et al. and titled, “Chair-Based Workout Apparatus and Methods”, which claims priority to U.S. Patent Application Ser. No. 61/989,367 (the “&#39;367 application”), filed May 6, 2014 by Craig A. VanHorn et al. and titled, “Chair-Based Workout Apparatus and Methods” . 
    
    
     COPYRIGHT STATEMENT 
     A portion of the disclosure of this patent document contains material that is subject to copyright protection. The copyright owner has no objection to the facsimile reproduction by anyone of the patent document or the patent disclosure as it appears in the Patent and Trademark Office patent file or records, but otherwise reserves all copyright rights whatsoever. 
     BACKGROUND 
     Conventional home or office workout systems and equipment are generally standalone devices requiring dedicated floor space. Even equipment that may be folded and stowed away requires dedicated floor space to be used. Available space within the home or office often limits the types of workout equipment, and the types of exercises that may be performed on the workout equipment. Further, many workout systems may each have features that are redundant from one another. For example, multiple pieces of workout equipment may each have a respective seat or bench that cannot be used with other pieces of equipment. 
     Moreover, workout equipment for resistance training include respective sets of weights or other forms of resistance. For example, a cable-based weight training machines may include a weight stack, each weight stack having a plurality of rectangular plates. The weight stack is only operable with its respectively associated cable-based weight training machine, and limited to the exercises capable of being performed with the particular cable-based weight training machine. Thus, in order to have the ability to perform a wider variety of exercises, additional machines, and weight types are necessary. For example, a bench and free weights may be needed to complement the cable machine. To utilize the bench and free weights, different types of dumbbells, barbells, and weighted plates may be needed. This additionally adds to the bulk and space requirements for a home or office gym setup. 
     “All-in-one” type adjustable workout equipment may be available, with adjustable weights, adjustable seating and standing positions, as well as the ability to be folded and stowed away. However, in the confines of a small office or room, even these singular pieces of workout equipment require floor space for the adjustable seat, and accompanying form of resistance when used. Moreover, in an office or home setting, the noise caused by the movement of equipment and performance of exercises on the equipment may cause distractions to other people in the immediate vicinity. Therefore, the combination of space requirements and the distraction caused by conventional weight training equipment makes the use of such equipment impractical. 
     Accordingly, workout equipment that utilizes an existing chair to reduce the space required, and distractions caused, is provided below. 
     BRIEF SUMMARY 
     According to a set of embodiments, a system, method, and apparatus for a chair-based workout system is provided. 
     The tools provided by various embodiments include, without limitation, methods, systems, and apparatuses. Merely by way of example, a method might comprise one or more procedures, any or all of which may be executed by the system or apparatus. Correspondingly, an embodiment might provide a system or apparatus to perform one or more procedures in accordance with methods provided by various other embodiments. Similarly, an apparatus might comprise features that may be implemented as part of a system, and/or to perform such methods. 
     In one aspect, chair-based workout system includes a piece of furniture having at least a backrest and a seat, and a chair workout machine coupled to the piece of furniture. The chair workout machine includes a support frame coupled to at least one structure of the piece of furniture, at least one rotatable arm rotatably attached to the support frame, and one or more resistance elements coupled to the at least one rotatable arm, the resistance elements arranged to provide resistance to movement by at least one body part of a user. 
     In one set of embodiments, the piece of furniture may include an office chair, where the support frame of the chair workout machine may couple to the backrest of the office chair. The support frame may include a mounting support frame for coupling to a seatback of the backrest of the office chair. The mounting support frame may include an at least one attachment point for attaching to the seat back. In other embodiments, the office chair may include a seat post, where the support frame includes at least one transverse member having a distal and proximal end, the distal end of the at least one transverse member having a clamp, the clamp coupling the support frame to the seat post of the office chair. 
     In further embodiments, the support frame further includes a locking plate having at least one set of locking positions for a respective at least one rotatable arm. The at least one rotatable arm may attach to a pivot point of the locking plate, wherein the rotatable arm is operable to rotate around the pivot point. The locking plate may include a locking mechanism to lock the at least one rotatable arm to a locking position of the at least one set of locking positions. The locking plate may further include two pivot plates to which two rotatable arms of the at least one rotatable arm are attached, wherein each of the two rotatable arms are operable to rotate around the pivot point. 
     In various embodiments, the one or more resistance elements comprise resistance bands extending along at least a portion of the at least one rotatable arm. The workout system may further include at least one user attachment disposed at a distal end of the at least one rotatable arm and operably coupled to the one or more resistance elements. The workout system may further include one or more guiding pulleys, wherein the guiding pulleys interact with the one or more resistance elements to guide movement of the one or more resistance elements by the at least one body part of the user. 
     In another aspect, a chair-based workout device is provided. The chair based workout device includes a support frame coupled to at least one structure of a piece of furniture, at least one rotatable arm rotatably attached to the support frame, and one or more resistance elements coupled to the at least one rotatable arm, the resistance elements arranged to provide resistance to movement by at least one body part of a user. 
     In one set of embodiments, the support frame includes a mounting support frame, wherein the mounting support frame is coupled to a seatback of the backrest of the office chair at an at least one attachment point of the support frame. In other embodiments, the support frame includes at least one transverse member having a distal and proximal end, the distal end of the at least one transverse member having a clamp, the clamp coupling the support frame to the seat post of the office chair. 
     In various embodiments, the workout device may further include at least one user attachment disposed at a distal end of the at least one rotatable arm and operably coupled to the one or more resistance elements. Additionally, the support frame may further include a locking plate having at least one set of locking positions for a respective at least one rotatable arm, wherein the at least one rotatable arm is attached to a pivot point of the locking plate, wherein the rotatable arm is operable to rotate around the pivot point, and wherein the locking plate includes a locking mechanism to lock the at least one rotatable arm to a locking position of the at least one set of locking positions. In further embodiments, the workout device may further include at least one user attachment, the user attachment disposed at a distal end of the at least one rotatable arm and operably coupled to the one or more resistance elements. 
     In another aspect, a method for utilizing the chair-based workout system is provided. The method includes providing a support frame attachable to at least one structure of a piece of furniture, securing the support frame to the at least one structure of a piece of furniture, providing at least one rotatable arm rotatably attached to the support frame, providing one or more resistance elements coupled to the at least one rotatable arm, and rotating the one or more rotatable arms about a pivot point of the support frame into a position that the one or more resistance elements resist movement by a user. 
     Various modifications and additions can be made to the embodiments discussed without departing from the scope of the invention. For example, while the embodiments described above refer to particular features, the scope of this invention also includes embodiments having different combination of features and embodiments that do not include all of the above described features. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       A further understanding of the nature and advantages of particular embodiments may be realized by reference to the remaining portions of the specification and the drawings, in which like reference numerals are used to refer to similar components. In some instances, a sub-label is associated with a reference numeral to denote one of multiple similar components. When reference is made to a reference numeral without specification to an existing sub-label, it is intended to refer to all such multiple similar components. 
         FIG. 1  is a frontal view of a clamp-supported chair workout machine, in accordance with various embodiments; 
         FIG. 2  is an overhead view of a clamp-supported chair workout machine, in accordance with various embodiments; 
         FIG. 3  is a side view of a clamp-supported chair workout machine, in accordance with various embodiments; 
         FIG. 4  is a back view of a clamp-supported chair workout machine, in accordance with various embodiments; 
         FIG. 5  is a perspective view of a clamp-supported chair workout machine, in accordance with various embodiments; 
         FIG. 6  is a frontal view of a seatback mountable chair workout machine, in accordance with various embodiments; 
         FIG. 7  is a top view of a seatback mountable chair workout machine, in accordance with various embodiments; 
         FIG. 8  is a side view of a seatback mountable chair workout machine mounted on a seatback, in accordance with various embodiments; 
         FIG. 9  is a perspective view of a seatback mountable chair workout machine, in accordance with various embodiments; 
         FIG. 10  is a front view of an arm of the clamp-supported chair workout machine and/or the seatback mountable chair workout machine, in accordance with various embodiments; 
         FIG. 11  is a section view of an arm of the clamp-supported chair workout machine and/or seatback mountable chair workout machine, in accordance with various embodiments; 
         FIG. 12  is a perspective view of an arm of the clamp-supported chair workout machine and/or seatback mountable chair workout machine, in accordance with various embodiments; and 
         FIG. 13  is a side view of a clamp-supported chair workout machine, in accordance with various embodiments. 
     
    
    
     DETAILED DESCRIPTION OF CERTAIN EMBODIMENTS 
     While various aspects and features of certain embodiments have been summarized above, the following detailed description illustrates a few exemplary embodiments in further detail to enable one of skill in the art to practice such embodiments. The described examples are provided for illustrative purposes and are not intended to limit the scope of the invention. 
     In the following description, for the purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the described embodiments. It will be apparent to one skilled in the art, however, that other embodiments of the present may be practiced without some of these specific details. In other instances, certain structures and devices are shown in block diagram form. Several embodiments are described herein, and while various features are ascribed to different embodiments, it should be appreciated that the features described with respect to one embodiment may be incorporated with other embodiments as well. By the same token, however, no single feature or features of any described embodiment should be considered essential to every embodiment of the invention, as other embodiments of the invention may omit such features. 
     Unless otherwise indicated, all numbers used herein to express quantities, dimensions, and so forth used should be understood as being modified in all instances by the term “about.” In this application, the use of the singular includes the plural unless specifically stated otherwise, and use of the terms “and” and “or” means “and/or” unless otherwise indicated. Moreover, the use of the term “including,” as well as other forms, such as “includes” and “included,” should be considered non-exclusive. Also, terms such as “element” or “component” encompass both elements and components comprising one unit and elements and components that comprise more than one unit, unless specifically stated otherwise. 
     The accompanying descriptions of  FIGS. 1-12  are provided for purposes of illustration and should not be considered to limit the scope of the different embodiments.  FIGS. 1-12  may refer to examples of different embodiments corresponding various stages and components of the chair workout machine and system, which can be considered alternatives or which can be used in conjunction with one another in the various embodiments. 
       FIG. 1  provides a front view of a clamp-supported chair workout machine  100 , in accordance with various embodiments. According to one set of embodiments, the clamp-supported chair workout machine  100  may be adapted to attach to furniture, such as various types of seating and chairs. Suitable furniture may include, but is not limited to, office chairs, recliners, single-seater sofas, rocking chairs, armchairs, stools, and the like. In various embodiments, the clamp-supported chair workout machine  100  includes a main support frame  105 . The main support frame  105  may have an L-shape, where a vertical member is coupled substantially orthogonal to a transverse member. In some embodiments, the main support frame  105  may be formed as a single continuous structure. In other embodiments, the vertical and transverse members may be two separate structures joined at joint  115 . Thus, in some embodiments, one or both of the transverse member and vertical member may exhibit a curve, forming at least partially an L-shape. In various embodiments, the joint  115  may include a spring loaded hinge that allows the vertical member to flex backwards. 
     The main support frame  105  may include a clamp  110  coupled to the distal end of the transverse member. The clamp  110  may securely couple the main support frame  105  one or more structures of a piece of furniture. In various embodiments, the clamp  110  may couple to, without limitation, a chair base, a main seat post coupling the seat of a chair to the chair base, one or more legs of a chair, an armrest, a seat, a headrest, a headrest support post attaching the headrest to the backrest, a backrest support post attaching the backrest to the seat, or the backrest itself. In some embodiments, a single clamp  110  may be used. In other embodiments, multiple clamps  110  may be used. For example, in some embodiments, the transverse member may branch into more than one distal end, each distal end coupled to a separate clamp  110 . Thusly, each separate clamp  110  may attach to different parts of the furniture. In various embodiments, different types of clamps  110  may be utilized. The types of clamps  110  may include, without limitation, collar clamps, vice clamps, claw-type clamps, C-clamps, O-clamps, strap clamps, screw clamps, clips, shaft collars, and the like. In one set of embodiments, a collar clamp  110  may be used to secure the main support frame  105  to the main seat post of an office chair. The collar clamp  110  may be fastened with standard fasteners, or with an ergonomic quick release mechanism. 
     The main seat post may couple the seat of the office chair to a wheeled, rotatable chair base. The main seat post may further be operable as a hydraulic or pneumatic cylinder of the office chair, allowing the seat to be raised or lowered relative to the chair base. In further embodiments, the length of the transverse member or vertical member may be adjustable to adapt to the particular piece of furniture it is adapted to. The transverse member may be positioned below the seat, extending from the clamp  110  coupled to main seat post of the chair, traversing the underside of the seat to the backrest of the office chair. The main support frame  105  may then curve around the backrest allowing the vertical member of the member to extend along the length of the backrest. The length of the vertical member may again be adjustable to adapt to the length of the backrest. In various embodiments, the surfaces of the main support bar  105  facing the seatback of the backrest, and underside of the seat, may be padded to reduce friction and wear between the furniture and main support frame  105 . The main support frame  105  may deflect with the reclining of the backrest of the office chair so that it does not impair normal operating functions of the chair. In further embodiments, the vertical member of the main support frame  105  may utilize a backrest attachment, such as, without limitation, nylon straps with buckles to fasten the vertical member to the backrest. The nylon straps may wrap around the backrest in either a latitudinal and longitudinal orientation. The backrest attachment may have adjustable features to conform to a variety of backrest designs. 
     Two pivoting rotatable arms  120  may be coupled to the main support frame  105  via a locking plate  135 . In various embodiments, the locking plate  135  may be secured to the main support frame  105 , and the two rotatable arms  120  rotatably coupled to the locking plate  135  at respective pivot points  145 . The locking plate  135  may serve as a pivoting hub as well as position locking plates. In some embodiments, the rotatable arms  120  may couple to the position locking plates on either side of the locking plate  135 . In other embodiments, the locking plate  135  may instead be formed as two separate position locking plates, each of which may independently secure to the main support frame  105 . In various embodiments, the rotatable arms  120  may be operable to rotate around, and lock into different locking positions  140  respectively along either side of locking plate  135 . As depicted in the following embodiments, a pair of rotatable arms  120  is utilized for illustrative purposes only. It will be appreciated by those skilled in the art that the number of rotatable arms  120  is not limited to two, and that in other embodiments, one or more rotatable arms  120  may be provided. 
     According to one set of embodiments, the rotatable arms  120  may each respectively include housing. The housing may include, without limitation, an outer side wall, inner side wall, a back plate, and front plate. The housing may provide protection to and contain various moving parts and resistance elements. Moving parts may include, without limitation, pulleys, gears, levers, belts, cables, and the like. Resistance elements may include various types of elastic bands, resistance bands, cords, bungee cords, rubber tubing, ropes, straps, and the like. In other embodiments, resistance elements may include weight plates. In yet further embodiments, no separate resistance element may be utilized within the housing, and instead a system of cables, pulleys, and other parts may be configured to allow the user to utilize their own bodyweight as resistance. In one set of embodiments, the rotatable arms  120  may each respectively include an inner resistance band  125 A and outer resistance band  125 B (collectively “resistance bands”). 
     The resistance bands  125 A,  125 B (collectively  125 ) may be secured respectively to the proximal ends of the rotatable arms  120  via anchoring pins  150 . In various embodiments, each resistance band  125  may include, at a proximal end, a closed loop through which anchoring pin  150  may be passed through. The anchoring pin may then be secured to the housing of the rotatable arm  120 , for example, to the inner and outer side walls. The resistance bands  125  may extend down the length of rotatable arms  120  to a guiding pulley (not shown), or other moving part at the distal end of the rotatable arms  120 . In various embodiments, each of the inner resistance band  125 A and outer resistance band  125 B may each be coupled to a respective pulley, gear, or other moving part. The distal ends of the resistance bands may then terminate in a connection to a user attachment  130  with which a person may actuate the resistance bands  125  in performing a workout. The user attachments may include, without limitation, various handles, straps, or leg wraps that can be clipped, or otherwise attached to, with carabiners, or other quick release mechanisms, to the distal end of the resistance bands  125 . In embodiments employing resistance bands  125 , the resistance provided by the resistance bands  125  may be adjusted by a user by changing which band, and the number of resistance bands that are attached to the handle. For example, in some embodiments, the load provided by the resistance bands may be adjustable from approximately zero pounds up to two hundred pounds per arm. In other embodiments, a higher load may be provided by higher load resistance bands, dependent upon the nature of the furniture to which the main support frame  105  is attached. 
     In various embodiments, each of the rotatable arms  120  may rotate about pivot point  145  of the locking plate  135 , and lock into locking positions  140 . The rotatable arms  120  may rotate independently of each other, and lock into different locking positions  140 . In various embodiments, the locking positions  140  may be notches in the locking plate  135 . The rotatable arms  120  may be held in a locking position  140  by a locking mechanism (not shown). The locking mechanism may include, without limitation, a pull pin, retractable spring plunger, spring loaded pin, screw, bolt, or other locking mechanism. In some embodiments, the locking plate  135  may have locking positions  140  at approximately  30  degree increments. Each locking mechanism for rotatable arms  120  may be attached to a respective proximal end of each rotatable arm  120 . In some aspects, the rotatable arms  120  may change positions to encompass or enable the user to perform multiple exercises. 
     Thus, with the variations in rotatable arm position  120 , user attachments  130 , and resistance elements, the clamp supported workout machine  100  may be used to perform a number of exercises, including without limitation, the following: When the arms are clocked in the lower position, e.g. approximately five o&#39;clock to seven o&#39;clock positions on the locking plate  135 ; bicep curls, leg extensions, leg curls, shoulder press, shoulder shrugs, shoulder raises, etc. can be performed. When the arms are extended horizontally, e.g. approximately two o&#39;clock to four o&#39;clock and eight o&#39;clock to ten o&#39;clock; butterflies, bench press, incline press, decline press, reverse flies, back rows, etc. can be performed. When the arms are clocked in the upper position, approximately eleven o&#39;clock to one o&#39;clock; tricep extensions, crunches, decline bench press, etc. can be performed. In further embodiments, the user attachments  130  may be clipped into a position on the rotatable arms  120  for storage. In the stowed position, the workout machine  100  may maintain a low profile to avoid interfering with everyday use of the furniture. 
       FIG. 2  depicts a top view of a clamp-supported chair workout machine  200  according to various embodiments. The transverse member of the L-shaped main support frame  205  is visible coupled to a collar clamp  210  at a distal end of the transverse member. In some embodiments, the main support frame  205  may be a single continuous structure. In other embodiments, the main support frame  205  may be extendible. For example, in one set of embodiments, the transverse member of the main support frame  205  may include an outer layer and inner layer. The inner layer may be configured to slide into the outer layer at a proximal end of the outer layer  215 . Thus, the outer layer of the transverse member may extend outwards to adjust the length of the transverse member. The outer layer may then be locked against the inner layer at a desired length. 
     As described above with respect to  FIG. 1 , each of the rotatable arms  220  may include an inner resistance band  225 A and outer resistance band  225 B. In various embodiments, an anchoring pin may secure the resistance bands  225 A,  225 B (collectively  225 ) to the housing of the rotatable arm  220  at a proximal end of the rotatable arm  220 . The inner resistance band  225 A may extend to an inner guiding pulley  235 A, and outer resistance band  225 B may extend to outer guiding pulley  235 B (collectively “guiding pulleys”). In various embodiments, the guiding pulleys  235 A,  235 B (collectively  235 ) may further function as pivot points for each of the resistance bands  225  respectively. The resistance bands  225  are coupled to user attachments  230  at their distal ends. The resistance bands may be coupled to the user attachment  230  by, without limitation, such as carabiners, clips, hooks, or other types of quick release mechanisms. 
     Each of the rotatable arms  220  is coupled to main support frame  205  via locking plate  240 . The rotatable arms  220  may be rotatably coupled to locking plate  240  at a respective pivot point of the locking plate  240 . The rotatable arms  220  may be operable to rotate about a respective pivot point of the locking plate  240 , and locked at a specific locking position. As depicted, the rotatable arms  220  are locked at a six o&#39;clock locking position on the locking plate  240 . The rotatable arms  220  are locked to the locking position by a locking mechanism  245 . In various embodiments, the locking mechanism may include, without limitation, a pull pin, retractable spring plunger, spring loaded pin, screw, bolt, or other locking mechanism. 
       FIG. 3  provides a side profile view of the clamp-supported chair workout machine  300 . An L-shaped main support frame  305  comprises a vertical member and transverse member. The support frame  305  is coupled to clamp  310  at a distal end of the transverse member. The main support frame  305  may further include a spring loaded hinge  315  having an internal spring  355 . The spring may allow the vertical member of the main support frame  305  to flex backwards, deflecting with the reclining of a backrest of the attached furniture so that it does not impair normal operating functions of the furniture. Alternative techniques may be used to allow the vertical member to flex backwards at hinge  315 , including, without limitation, using tension bars, or hydraulic or pneumatic pistons within the vertical member of the main support frame  305 . 
     Rotatable arms  320  are coupled to main support frame  305  via locking plate  340 . Locking plate  340  is coupled to a distal end of the vertical member, and provides both a pivoting hub and position locking functionality. The rotatable arms  320  may be coupled to a respective pivot point on each side of the locking plate  340 . The rotatable arms  340  may be configured to rotate about each pivot point along locking positions in the locking plate  340 . Each rotatable arm  320  may be locked in a locking position by locking mechanism  345 . In various embodiments, the locking mechanism  345  may be a pull pin, such as a retractable spring plunger, which allows the rotatable arm to be selectively locked into position, or released for movement. 
     Each rotatable arm  320  may further include resistance bands  325 , coupled to a proximal end of the rotatable arm  320  by an anchoring pin  350 . Each resistance band  325  may include, at the proximal end, a closed loop through which anchoring pin  350  may be passed through. Anchoring pin  350  may then be secured to the rotatable arm  320  itself. Resistance band  325  may extend to a guiding pulley  335  positioned at the distal end of the rotatable arm  320 . In various embodiments, the guiding pulley  335  may help guide the resistance bands  325  down the length of the rotatable arms  320 , as well as acting as pivot points for each of the resistance bands  325 . The distal end of the resistance band may then be coupled to a user attachment  330 . User attachments  330  may include, without limitation, a handle as depicted. The handle may be clipped to the distal end of the resistance band  325  by various means, including, without limitation, carabiners, clips, hooks, sleeve-type quick connectors, and other like quick release mechanisms. 
       FIG. 4  illustrates a rear profile view of the clamp-supported chair workout machine  400 , in accordance with various embodiments. In one set of embodiments, the chair workout machine  400  includes an L-shaped main support frame  405 . The main support frame  405  may include a vertical member and transverse member. In various embodiments, the vertical member and transverse member may be part of one continuous structure. In other embodiments, the vertical and transverse members may be coupled at joint  415 , where the joint  415  may further include a spring loaded hinge that allows the vertical member to flex backwards relative to the transverse member. A clamp  410  may be coupled to a distal end of the transverse member, the clamp  410  operating to secure main support frame  405  to furniture. 
     A pair of rotatable arms  420  may be coupled to the main support frame  405  via a locking plate  435 . As described above, the locking plate  435  may act as both a pivoting hub and position locking plate for the rotatable arms  420 . The rotatable arms  420  may be coupled to the locking plate  435  at a respective pivot point on the locking plate  435 . The locking plate  435  may in turn be coupled a distal end of the vertical member of the main support frame  405 . Each of the rotatable arms  420  may operate to rotate about a respective pivot point, like the hands of a clock. The rotatable arms  420  may be locked into the various locking positions  440  on the locking plate  435  via a respective locking mechanism  445 . In some embodiments, the locking mechanism  445  may include, without limitation, a retractable spring plunger. In these embodiments, the locking mechanism  445  may include a button or trigger to cause the retractable spring plunger to retract a plunger of the retractable spring plunger, thereby releasing the retractable arm  420  from the locking position  440  to which it was locked. The retractable arm  420  may then be swung to a different locking position  440  on the locking plate  435 . When the button or trigger is released from the retractable spring plunger, the spring loader plunger will advance, allowing the plunger to catch the new locking position  440 , locking the rotatable arm  420  to the new locking position  440 . 
     In various embodiments, rotatable arms  420  may include one or more resistance elements. In some embodiments, the resistance elements may include one or more resistance bands. The one or more resistance bands may be secured to a proximal end of a respective rotatable arm  420  via an anchoring pin  450 . The resistance bands may include on one end a loop or hook. The anchoring pin  450  may then pass through the loop or hook of the resistance band, and attach to the rotatable arm  420 . The resistance bands may then extend from the anchoring pin to a guiding pulley at a distal end of the rotatable arm. 
     Each guiding pulley may be secured to the rotatable arm  420  at a respective set of pulley attachment points  425 . In various embodiments, the rotatable arms  420  may be strengthened or reinforced at pulley attachment points  425  or at points in the proximal end where anchoring pin  450  attaches to the rotatable arm  420 . Guiding pulleys may be coupled to pulley attachment points  425  in several ways, including, but not limited to, by screws, bolts, weld, adhesive, anchoring pins, and the like. In various embodiments, pulley attachment points  425  may be located on a back plate of the rotatable arm  420 . In other embodiments, the pulley attachment points  425  may be located on any one or combination of structures of the rotatable arm, such as the side plates, front plate, back plate, or end plate. An end plate may include, for example, a cap joining at least two of either of the side plates, front plate, and back plate of a rotatable arm  420 . A user attachment  430  may further be coupled to a distal end of the resistance bands. 
       FIG. 5  illustrates a perspective view of a clamp-supported chair workout machine  500 , in accordance with various embodiments. As described above with respect to  FIGS. 1-4 , the chair workout machine  500  includes an L-shaped main support frame  505 . In various embodiments, the main support frame  505  may have a hollow structure. As depicted, in some embodiments, the main support frame  505  may have a hollow rectangular cross-section, having a tube-like structure and a curved elbow. In other embodiments, the elbow may not be curved, but may instead be angled, for example, at a ninety-degree angle. In various other embodiments, the main support frame  505  may be a hollow structure with a different cross-sectional shape. For example, different cross-sectional shapes may include circular, elliptical, or polygonal shapes. In yet further embodiments, the main support frame  505  may be a solid structure without a defined inner cavity. 
     As described with respect to the previous embodiments, the main support frame  505  may be comprised of a single continuous structure, or formed from two or more separate structures. The main support frame  505  includes both a transverse member, extending outward from the elbow in a transverse direction, and a vertical member, extending from the elbow in a vertical direction. In one set of embodiments, the transverse member and vertical member may be two separate structures coupled together at joint  515 . In various embodiments, the transverse member, vertical member, or both members may comprise at least part of the bend of the elbow. In further embodiments, the joint  515  may also include a spring loaded hinge, allowing the vertical member of the main support frame  505  to flex backwards, deflecting with the reclining of a backrest of the attached furniture so that it does not impair normal operating functions of the furniture. In various embodiments, a collar clamp  510  may be provided at a distal end of the transverse member of the main support frame  505 . Although a collar clamp  510  has been depicted, it will be appreciated by those having skill in the art, that other clamping or attaching means may be utilized as appropriate to secure to the main support frame  505  to a particular piece of furniture. For example, in other embodiments, the clamp  510  may include, without limitation, vice clamps, claw-type clamps, C-clamps, O-clamps, strap clamps, screw clamps, clips, shaft collars, and the like. In one set of embodiments, a collar clamp  510  may be used to secure the main support frame  505  to the main seat post of an office chair. The collar clamp  510  may be fastened to the main seat post of the office chair with standard fasteners, or with an ergonomic quick release mechanism. 
     A locking plate  540  may be coupled to the main support frame  505 , the locking plate  540  being both a pivoting hub and position locking plate for a pair of rotatable arms  520 . In various embodiments, the rotatable arms  520  may be coupled to a respective pivot position around which the rotatable arms  520  may rotate. The locking plates  540  may further include various locking positions to which the rotatable arms  520  may be locked into. As depicted, the rotatable arms are both locked into a six o&#39;clock locking position on their respective sides of the locking plate  540 . 
     In various embodiments, the rotatable arms  520  may include resistance elements. For example, in one set of embodiments, the rotatable arms  520  may include an inner resistance band  525 A and outer resistance band  525 B (collectively “resistance bands”). The resistance bands  525 A,  525 B (collectively  525 ) may extend from a proximal end of a rotatable arm  520 , the proximal end being the side of the rotatable arm  520  connected to the locking plate  540 , to a distal end of the rotatable arm  520 . In various embodiments, the distal end of the rotatable arm  520  may include guiding pulleys  535 A,  535 B (collectively  535 ) corresponding to the inner and outer resistance bands. The distal ends of the resistance bands  525  may further be coupled to a respective user attachment  530 . In one set of embodiments, the guiding pulleys  535  may be adjustable to move with the movement and positioning of the resistance bands  525 , rotatable arms  520 , and user attachments  530 . For example, depending on the positioning of the user attachment  530  and rotatable arm  520 , the guiding pulleys  535  may swivel to allow a greater range of motion. 
     According to various embodiments, the user attachment  530  may attach to the distal end of one or more resistance bands  525 . In one set of embodiments, the user attachment  530 , or distal ends of the one or more resistance bands  525  may include a connector. In some embodiments, the connectors may include clips, carabiners, hooks, or other quick release. In other embodiments, the connector may be a separate component to attach the user attachment  530  to the distal ends of the resistance bands  525 . In such instances, both the user attachments  530  and distal ends of the resistance bands  525  may have some attachment features to which the connector can couple to. For example, attachment features may include, without limitation, loops, straps, rings, hooks, buckles, and the like. In various embodiments, the rotatable arms  520  may include snapback storage for the various user attachments  530 . The snapback storage may be configured to allow the user attachments  530  to lock into a position on the rotatable arm  520  so as not to drag on the ground or hang loosely. 
     In another aspect, certain sets of embodiments provide a different type of chair workout machine that may be mountable to a backrest of a chair. For example, the chair workout machine may be mounted to a seatback of the backrest of a chair. Various embodiments of the seatback mountable chair workout machine will be described with reference to  FIGS. 6-9 . 
     A first set of embodiments of the seatback mountable chair workout machine will be described with references to  FIGS. 6 &amp; 7 , concurrently.  FIG. 6  depicts a front view of a seatback mountable chair workout machine  600 , in accordance with various embodiments.  FIG. 7  depicts a top view of the seatback mountable chair workout machine  700 , in accordance with various embodiments. According to one set of embodiments, the seatback mountable chair workout machine  600 ,  700  may include a mount support frame  605 ,  705 . In various embodiments, the mount support frame  605 ,  705  may be an X-shaped structure having, when viewed from behind, a top right arm  610 A,  710 A, top left arm  610 B,  710 B, bottom right arm  610 C, and bottom left arm  610 D (collectively the “arms”). Each of the arms  610 A,  610 B,  610 C,  610 D (collectively  610 ) may include respectively an attachment point  615 A,  615 B,  615 C,  615 D (collectively  615 ) at which the arms  610 ,  710 A,  710 B may be attached to a seatback or a backrest. In other embodiments, the mount support frame  605 ,  705  may have a different shape or structure  640  as depicted in phantom lines. For example, the mount structure  640  may include without limitation, plates of various shapes, bars, one or more arms, a claw-like structure, a sleeve, or other suitable shape or structure configured to attach to a seatback or backrest. 
     In various embodiments, the mount support frame  605 ,  705  may be coupled to a locking plate  635 ,  735  via mounting hub  645 ,  715 . In various embodiments, the locking plate  635 ,  735  may be secured to the mounting hub  645 ,  715  using fasteners, such as, without limitation, screws, bolts, welding, or other suitable methods of attachment. As in the previously described embodiments, rotatable arms  620 ,  720  may be attached to respective pivot points of the locking plate  635 ,  735  via locking mechanism  745 . The locking mechanism  745  may include, without limitation, a pull pin, retractable spring plunger, spring loaded pin, screw, bolt, or other locking mechanism. The locking plate  635 ,  735  may be a pivoting hub as well as a position locking plate for each rotatable arm  620 ,  720 . The locking plate  635 ,  735  may further include a respective set of locking positions to which each rotatable arm  620 ,  720  may be secured via the locking mechanism  745 . 
     In various embodiments, the rotatable arms  620 ,  720  may include resistance bands  625 A,  625 B,  725 A,  725 B (collectively  625  and  725  respectively) that extend from a proximal end of the respective rotatable arm  620 ,  720  to a distal end of the rotatable arm  620 ,  720 . In various embodiments, the distal end of the rotatable arm  620 ,  720  may further include guiding pulleys  740  corresponding to the inner and outer resistance bands  625 ,  725 . The distal ends of the resistance bands  625 ,  725  may further couple to a respective user attachment  630 ,  730 . In one set of embodiments, the guiding pulleys  740  may be adjustable to move with the movement and positioning of the resistance bands  625 ,  725 , rotatable arms  620 ,  720 , and user attachments  630 ,  730 . For example, depending on the positioning of the user attachment  630 ,  730  and rotatable arm  620 ,  720 , the guiding pulleys  740  may swivel to allow a greater range of motion. 
     According to various embodiments, the user attachment  630 ,  730  may attach to the distal end of one or more resistance bands  625 ,  725 . In one set of embodiments, the user attachment  630 ,  730 , or distal ends of the one or more resistance bands  625 ,  725  may include a connector. In some embodiments, the connectors may include clips, carabiners, hooks, or other quick release. In other embodiments, the connector may be a separate component to attach the user attachment  630 ,  730  to the distal ends of the resistance bands  625 ,  725 . In such instances, both the user attachments  630 ,  730  and distal ends of the resistance bands  625 ,  725  may have some attachment features to which the connector can couple to. For example, attachment features may include, without limitation, loops, straps, rings, hooks, buckles, and the like. As described in previous embodiments, the rotatable arms  620 ,  720  may further include snapback storage for the various user attachments  630 . The snapback storage may be configured to allow the user attachments  630  to lock into a position on the rotatable arm  620 ,  720  so as not to drag on the ground or hang loosely. 
       FIG. 8  is a side view of a seatback mountable chair workout machine  800  as coupled to a back rest  820 , in accordance with various embodiments. According to one set of embodiments, an X-shaped mount support frame  805  is provided. The mount support frame  805  includes an upper set of arms  810 A and lower set of arms  810 B (collectively “arms”). The arms  810 A,  810 B (collectively  810 ) are coupled to a backrest  820  via an upper adjuster  815 A, and lower adjuster  815 B (collectively “adjusters”). The adjusters  815  may couple to the seatback of the back rest  820  in various ways, including, without limitation, being screwed into the seatback, being bolted to the seat back, or attaching to an adapter separately installed on the seatback for attachment to mount support frame  805 . In various embodiments, the adjusters  815  may be operable to extend and retract, pivot, rotate, and move to allow the mount support frame  805  to be coupled to various shapes, sizes, materials, and positions of backrests  820 . 
     In a further set of embodiments, one or more straps  825  may be used to further secure the backrest  820  to the mount support frame  805 . In various embodiments, the strap  825  may wrap around the entire backrest  820  of the chair and have tightening functionality to secure the backrest  820  against mount support frame  805 . In some embodiments, the one or more straps  825  may be positioned to wrap around the backrest in a longitudinal orientation, while in other embodiments, the one or more straps  825  may be positioned to wrap around the backrest in a latitudinal orientation. In further embodiments, the one or more straps  825  may be arranged in an intersecting configuration where one or more straps  825  may intersect with one or more other straps  825 , to form a matrix, grid, or lattice shape. In yet further embodiments, the one or more straps  825  may be a sleeve or sheath that may be tightened around the backrest  820 . The one or more straps  825  may further include a quick release mechanism to disconnect from the back rest  820 , mount support frame  805 , or both. In another embodiment, the one or more straps  825  may also be tightened or loosened by controls of the adjusters  815 . 
       FIG. 9  is a perspective view of a seatback mountable chair workout machine  900 , in accordance with various embodiments. According to a set of embodiments, the seatback mountable chair workout machine  900  includes a mount support frame  905 . In various embodiments, the mount support frame  905  may be an X-shaped structure having one or more arms  910 . Each of the arms  910  may include a set of respective arm attachment points at which the arms  910  may couple to a seatback or backrest. 
     A locking plate  915  may be mounted to a mounting hub of the mount support frame  905 . In various embodiments, the locking plate  915  may be secured to the mounting hub via using fasteners, such as, without limitation, screws, bolts, welding, or other suitable methods of attachment. In other embodiments, the mounting hub may be part of the locking plate  915  to which mount support frame  905  may be coupled to the locking plate  915 . 
     Rotatable arms  920  may be attached to respective pivot points of the locking plate  915  via locking mechanism  940 . In various embodiments, the locking mechanism  940  may be a retractable spring plunger having a push button that may be depressed to retract a plunger from an extended position, or released to allow the plunger to extend from a retracted position. The locking mechanism may thus be used to lock or release the rotatable arms from a locking position of the locking plate  915 . 
     In various embodiments, the rotatable arms  920  may include resistance bands  925  that extend from a proximal end of a respective rotatable arm  920  that is connected to the locking plate  915 , to a distal end of the rotatable arm  920 . The rotatable arms  920  may further include guiding pulleys at a distal end. In one set of embodiments, each guiding pulley may be secured to the rotatable arm  920  at a respective set of pulley attachment points  935 . In various embodiments, the rotatable arms  920  may be strengthened or reinforced at pulley attachment points  935  or at points in the proximal end where an anchoring pin attaches to the rotatable arm  920 , where a proximal end of resistance bands  925  may be secured to the rotatable arm  920  by the anchoring pin. In various embodiments, pulley attachment points  935  may be located on a back plate of the rotatable arm  920 . In other embodiments, the pulley attachment points  935  may be located on any one or combination of structures of the rotatable arm, such as the side plates, front plate, back plate, or end plate. An end plate may include, for example, a cap joining at least two of either of the side plates, front plate, and back plate of a rotatable arm  920 . A user attachment  930  may further be coupled to a distal end of the resistance bands  925 . 
     In some embodiments, the arms of the workout apparatus might have a swivel function to provide enhanced versatility in the exercises accommodated by the apparatus. For instance, a rotatable arm (e.g., as described above) might include functionality to rotate axially, enabling the resistance bands to be stretched in different directions (such as in a frontward direction from the perspective of a person sitting in the chair, in a downward direction from the same perspective, in an upward direction from the same perspective, and/or at any angle between these directions). In some embodiments, the workout apparatus may have at least one rotatable arm  1000 . In various embodiments, e.g., as described above, such a rotatable arm  1000  may be operable to rotate around, and lock into different locking positions respectively along either side of a locking plate. Merely by way of example,  FIGS. 10-12  illustrate various views of a rotatable arm  1000  that can be implemented with any of the workout apparatus described herein. The skilled reader should understand that, while not illustrated on  FIGS. 10-12  for the sake of simplicity, the rotatable arm  1000  can be attached to a locking plate of such an apparatus (or any other attachment point), as described in detail above. 
     Turning to the figures,  FIG. 10  provides a front view of one embodiment of a rotatable arm  1000  (which may correspond to rotatable arm  120  of  FIG. 1 , rotatable arm  220  of  FIG. 2 , rotatable arm  320  of  FIG. 3 , rotatable arm  420  of  FIG. 4 , rotatable arm  520  of  FIG. 5 , rotatable arm  620  of  FIG. 6 , rotatable arm  720  of  FIG. 7 , rotatable arm  820  of  FIG. 8 , rotatable arm  920  of  FIG. 9 , and/or the like) of the clamp-supported chair workout machine and/or the seatback mountable chair workout machine, in accordance with various embodiments.  FIG. 11  is a section view of an embodiment of the arm  1000  of the clamp-supported chair workout machine and/or the seatback mountable chair workout machine, in accordance with various embodiments.  FIG. 12  is a perspective view of an embodiment of the arm  1000  of the clamp-supported chair workout machine and/or the seatback mountable chair workout machine, in accordance with various embodiments. 
     Additionally and/or alternatively, rotatable arm  1000  may include a rotatable attachment (shown within dashed circle  1020 ) and be operable to rotate axially around a pivot point  1005  (shown in  FIG. 11 ) and/or longitudinal axis A-A (shown in  FIG. 11 ). The rotatable attachment including pivot point  1005  may be located in rotatable arm  1000 . The rotatable attachment including pivot point  1005  may be located near a top portion of rotatable arm  1000  (e.g., near the proximal end  1025  as described above, between a middle  1030  of the rotatable arm  1000  and the proximal end  1025  of the rotatable arm  1000 , etc.) such that all (or substantially all) of rotatable arm  1000  rotates about pivot point  1005  and/or axis A-A. Alternatively and/or additionally, the rotatable attachment including pivot point  1005  might be located elsewhere on the arm  1000 . In one aspect, the rotatable attachment including pivot point  1005  can be located anywhere on the arm  1000  that allows at least a portion of the arm  1000  to rotate without binding the resistance bands. The rotatable attachment including the pivot point  1005  may be provided by at least one of a cam follower bearing, a roller bearing, a thrust bearing between two washers, a solid sleeve bearing, and/or the like. 
     A tensile force on one or more resistance elements  1010  (such as the resistance bands described above) may cause all (or substantially all) of the rotatable arm  1000  to rotate axially about pivot point  1005  and/or axis A-A. (Alternatively and/or additionally, a directly-applied axial torque on the arm  1000  itself can cause similar rotation.) By allowing rotatable arm  1000  rotate about a pivot point  1005  and/or axis A-A, all (or substantially all) of the rotatable arm  1000  may rotate to different positions to support each type of exercise the user of the supported chair workout machine and/or the seatback mountable chair workout machine is performing. In some cases, the pivot point  1005  can provide free rotation, which can allow the arm  1000  to naturally rotate into an optimal position for a particular exercise being performed. 
     In another set of embodiments, rotatable arm  1000  might further comprise one or more anti-friction devices, such as roller tubes  1015   a  and  1015   b  (collectively roller tubes  1015 ) to name one example. The roller tubes  1015  might be located near a bottom portion of the rotatable arm  1000 . A first roller tube  1015   a  can be disposed on a first side of rotatable arm  1000  and a second roller tube  1015   b  may be disposed on a second side (opposite to roller tube  1015   a ) of rotatable arm  1000 . The space between the one or more roller tubes  1015  may act as a frictionless guide or near frictionless guide for the one or more resistance elements  1010 . The one or more roller tubes  1015  may rotate as the resistance elements  1010  extend and retract between the tubes  1015 , helping to prevent any friction or binding between the arm  1000  and the resistance elements  1010  as the resistance elements  1010  extend and retract. 
     Thus, the one or more roller tubes  1015  can act to prevent the resistance elements  1010  from rubbing against the side of the arm  1000 , reducing the wear and tear of the resistance elements  1010  and/or providing a more satisfying workout experience. Additionally, the one or more roller tubes  1015  may prevent the one or more resistance elements  1010  from retracting back into the arm  1000  after the clamp-supported chair workout machine and/or the seatback mountable chair workout machine is used. 
     In additional embodiments, all or substantially all of the support frame of the workout apparatus might have functionality to flex backwards (away from the chair to which the apparatus is attached), deflecting with the reclining of a backrest of the attached furniture so that it does not impair normal operating functions of the furniture. Merely by way of example,  FIG. 13  provides a side view of a clamp-supported chair workout machine  1300 , in accordance with various embodiments. 
     The clamp-supported chair workout machine  1300  might comprise an L-shaped main support frame  1305  which has a vertical member and transverse member. The support frame  1305  may be coupled to clamp  1310  at a distal end of the transverse member. Clamp  1310  may be configured to attach to a structure of an office chair such as a seat post. 
     The main support frame  1305  may further include a spring loaded hinge  1315  having an internal spring (not shown in  FIG. 13 ). The spring may allow the vertical member of the main support frame  1305  to flex backwards, deflecting with the reclining of a backrest of the attached furniture so that it does not impair normal operating functions of the furniture, and to return to an original position when the backrest returns. Alternative techniques may be used to allow the vertical member to flex backwards at hinge  1315 , including, without limitation, using tension bars, or hydraulic or pneumatic pistons within the vertical member of the main support frame  1305 . 
     Additionally and/or alternatively, all or substantially all of the support frame  1305  of the supported chair workout machine  1300  might have functionality to flex backwards. Clamp  1310  may be configured to allow all or substantially all of the support frame  1305  (including both the vertical member and transverse member) to flex backwards, deflecting with the reclining of a backrest of the attached furniture so that it does not impair normal operating functions of the furniture. The support frame  1305  may be rigid or include a spring loaded hinge that further allows the vertical member of the main support frame  1305  to flex backwards. A spring may be disposed in clamp  1310  to allow all or substantially all of the support frame  1305  (including both the vertical member and transverse member) to flex backwards. Alternative techniques may be used to allow the support frame  1305  to flex backwards at clamp  1310 , including, without limitation, using tension bars or hydraulic or pneumatic pistons within clamp  1310 . Additionally and/or alternatively, clamp  1310  may prevent/restrict the support frame  1310  from flexing forwards toward a backrest of the attached furniture. 
     While certain features and aspects have been described with respect to exemplary embodiments, one skilled in the art will recognize that numerous modifications are possible. For example, the methods and processes described herein may be implemented using the variously described hardware components and any combination thereof. Further, while various methods and processes described herein may be described with respect to particular structural and/or functional components for ease of description, methods provided by various embodiments are not limited to any particular structural and/or functional architecture but instead can be implemented on any suitable hardware. Similarly, while certain functionality is ascribed to certain system components, unless the context dictates otherwise, this functionality can be distributed among various other system components in accordance with the several embodiments. 
     Moreover, while the procedures of the methods and processes described herein are described in a particular order for ease of description, unless the context dictates otherwise, various procedures may be reordered, added, and/or omitted in accordance with various embodiments. Moreover, the procedures described with respect to one method or process may be incorporated within other described methods or processes; likewise, system components described according to a particular structural architecture and/or with respect to one system may be organized in alternative structural architectures and/or incorporated within other described systems. Hence, while various embodiments are described with—or without—certain features for ease of description and to illustrate exemplary aspects of those embodiments, the various components and/or features described herein with respect to a particular embodiment can be substituted, added and/or subtracted from among other described embodiments, unless the context dictates otherwise. Consequently, although several exemplary embodiments are described above, it will be appreciated that the invention is intended to cover all modifications and equivalents within the scope of the following claims.