Abstract:
A novel exercise and sporting apparatus with improved safety features is disclosed. In preferred embodiments, the apparatus comprises: a first resilient arched member having two opposite end zones, and being configured to securely engage with a foot receiving member; a second resilient arched member having two opposite end zones, and being configured to contact a ground surface; a connection element being configured to connect an end zone of the first resilient arched member with an end zone of the second resilient arched member, and a rotation-opposing assembly extending from the connection element toward a ground surface, the rotation-opposing assembly being configured to limit an amount of rotational motion of the apparatus.

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
       [0001]    The present application is a non-provisional of, and claims priority to, co-pending provisional patent application Nos. 61/827,719 and 61/869,906 filed on May 27, 2013 and Aug. 26, 2013 respectively. The entire contents of both above-referenced patent applications are incorporated by reference herein. 
     
    
     FIELD OF THE INVENTION 
       [0002]    The present invention relates to the field of sporting and exercise equipment and in particular to novel exercising and sporting footwear apparatuses. 
       BACKGROUND 
       [0003]    Sporting and exercise footwear are well known in the art. In particular, boots which contain a spring mechanism are known to absorb impact forces, increase muscle, and build cardiovascular performance. This bouncing footwear typically is used for physical fitness routines that incorporate bouncing, jumping, and plyometric exercises. 
         [0004]    Bouncing footwear devices are known in the art as shown, for example, in U.S. Pat. No. 4,492,374 issued to Lekhtman et al on Jan. 8, 1985. As shown by this patent, the main unit has a spring member that is permanently attached to the foot receiving member. This can be inconvenient especially during storage and transport and prevents individual components from being replaced. Also, the layers which form the spring member are attached to each other and to an adjustment mechanism not capable of disassembly. 
         [0005]    U.S. Pat. No. 5,205,798 granted to Gregory Lekhtman on Apr. 27, 1993, describes a sporting and exercising device comprising a foot receiving portion and a spring portion detachably attached to the bottom face of the foot receiving portion. A major drawback of this sporting and exercising device is that the spring portion collapses after about 7 centimeters (cm) (out of about 13 cm) of deformation by compression and lacks a smooth even elasticity. This reduces the ability to absorb increasing higher impact energies, thereby reducing the available bouncing power. 
         [0006]    U.S. Pat. No. 5,643,148 granted to Denis Naville on Jul. 1, 1997 describes a sporting and exercising device comprising an upper foot-receiving portion and a lower spring portion. However, the resilient shock absorbing bodies disclosed prevent the spring portion from further collapse after a certain deformation by compression has been reached. A major drawback of this device is that the lower spring layer easily disassembles during higher impacts even on level surfaces. When a user is running in the device and accidentally engages the safety, the bottom layer disassembles causing the user to fall and or break ankles from landing on the disassembled top portion of the device. 
         [0007]    Another drawback of this device is that there are only four resilient shock absorbers. This limits the return energy after an impact so the user is not able to maximize their bounce or rebound. Also, the shock absorbers are situated in the center of the elastic band and when the boot compresses it compromises the lateral stability of the device which results in the device unstably rocking left or right causing the user to easily disengage the lower spring layer. Another drawback is that the upper foot receiving portion sits completely flat on the lower spring portion. This forces the user&#39;s foot to stay in a forced flexed position throughout an exercise session which is extremely uncomfortable for the user causing the boot to rub against the skin. 
         [0008]    A further drawback of the device is that it is extremely heavy creating a tendency for users to drag their feet while using the device. This leads to improperly compression of the device and decreases the life of the device and it&#39;s parts. 
         [0009]    Another drawback is that the four resilient shock absorbers are slid into place which means under the repeated force of compressing the unit the shock absorbers have a high chance of sliding out resulting in failure of the unit which could cause potentially fatal harm to the user. Another major drawback is that the bottom tread on the lower layer does not extend a significant length of the ground contacting surface. If a user leans too far forward or too far back the tread may cease to contact the ground causing the user to skid on the exposed plastic shell and possibly fall injuring themselves. Another drawback of the device is that if a user does not have good balance or strong stability muscles they can fall forward if they go too far forward in the device or fall back if they go too far back in the device. There is nothing physically on the shoe such as a brake to prevent falling forward or falling back making users uncomfortable and afraid to try the device. 
         [0010]    Based on the above-mentioned drawbacks, there is a strong need in the field for new and improved advanced sporting and exercise footwear devices. There is a further need for devices and apparatuses that are able to promote user safety and confidence. There is also a need for footwear apparatuses capable of being reconfigured for different activities and for replacement or substitution of the various components. 
       BRIEF SUMMARY OF THE INVENTION 
       [0011]    It is one aspect of the present invention to provide a novel exercise and sporting footwear apparatus designed to allow the user to perform jumping and bouncing activities. In preferred embodiments, the apparatus comprises: a first resilient arched member having two opposite end zones, and being configured to securely engage with a foot receiving member; a second resilient arched member having two opposite end zones, and being configured to contact a ground surface; a connection element being configured to connect an end zone of the first resilient arched member with an end zone of the second resilient arched member, and further comprising a rotation-opposing assembly extending from the connection element toward a ground surface, the rotation-opposing assembly being configured to limit an amount of rotational motion of the apparatus. 
         [0012]    It is another aspect of the present invention to provide a novel exercise and sporting footwear apparatus designed to be able to be reconfigured to accomplish a variety of different exercising activities. In other preferred embodiments, the apparatus comprises a boot accessory, wherein the boot accessory comprises an interface assembly configured to slidably and temporarily secure to a complementary interface assembly of a foot receiving member. In this regard, the apparatus of the present invention is able to connect and mate with a plurality of different sporting and exercise attachments such as rollerblades, ice skates, skis, snowboards, snow shoes, etc. and the like. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0013]    Some embodiments of the present invention are illustrated as an example and are not limited by the figures of the accompanying drawings, in which like references may indicate similar elements and in which: 
           [0014]      FIG. 1  depicts a front perspective view of an example of an exercise and sporting footwear apparatus according to various embodiments of the present invention. 
           [0015]      FIG. 2  illustrates a side profile view of an example of an exercise and sporting footwear apparatus according to various embodiments described herein. 
           [0016]      FIG. 3  shows an exploded side profile view of an example of an exercise and sporting footwear apparatus according to various embodiments described herein. 
           [0017]      FIG. 4A  depicts a first side profile view of an example of an exercise and sporting footwear apparatus positioned on a ground surface according to various embodiments described herein. 
           [0018]      FIG. 4B  depicts a second side profile view of an example of an exercise and sporting footwear apparatus positioned on a ground surface according to various embodiments described herein. 
           [0019]      FIG. 5A  illustrates a side profile view of an example of a first interface assembly disengaged from a second interface assembly an exercise and sporting footwear apparatus according to various embodiments described herein. 
           [0020]      FIG. 5B  illustrates a side profile view of an example of a first interface assembly engaged with a second interface assembly an exercise and sporting footwear apparatus according to various embodiments described herein. 
           [0021]      FIG. 5C  illustrates a bottom view of an example of a first interface assembly partially engaged with a second interface assembly together which become a connection apparatus of an exercise and sporting footwear apparatus according to various embodiments described herein. 
           [0022]      FIG. 6A  shows a side perspective views of an example of an engagement states between a foot receiving member and an upper resilient arched member of a boot accessory of an exercise and sporting footwear apparatus according to various embodiments described herein. 
           [0023]      FIG. 6B  shows a side perspective views of an example of an engagement states between a foot receiving member and an upper resilient arched member of a boot accessory of an exercise and sporting footwear apparatus according to various embodiments described herein. 
           [0024]      FIG. 6C  shows a side perspective views of an example of an engagement states between a foot receiving member and an upper resilient arched member of a boot accessory of an exercise and sporting footwear apparatus according to various embodiments described herein. 
           [0025]      FIG. 7A  depicts a side perspective views of an example of an elongate tension member of an exercise and sporting footwear apparatus according to various embodiments described herein. 
           [0026]      FIG. 7B  depicts a side perspective views of an example of an elongate tension member of an exercise and sporting footwear apparatus according to various embodiments described herein. 
           [0027]      FIG. 8A  illustrates a side profile view of an example of an impact absorbing member of an exercise and sporting footwear apparatus according to various embodiments described herein. 
           [0028]      FIG. 8B  illustrates a side profile view of an example of an impact absorbing member of an exercise and sporting footwear apparatus according to various embodiments described herein. 
           [0029]      FIG. 8C  illustrates a side profile view of an example of an impact absorbing member of an exercise and sporting footwear apparatus according to various embodiments described herein. 
           [0030]      FIG. 9A  shows a bottom perspective view of an example of a self balancing tread of an exercise and sporting footwear apparatus according to various embodiments described herein. 
           [0031]      FIG. 9B  shows a side profile view of an example of a self balancing tread of an exercise and sporting footwear apparatus according to various embodiments described herein. 
           [0032]      FIG. 9C  shows a side profile view of an example of a self balancing tread of an exercise and sporting footwear apparatus according to various embodiments described herein. 
           [0033]      FIG. 10A  shows a bottom perspective view of an example of a self balancing tread of an exercise and sporting footwear apparatus according to various embodiments described herein. 
           [0034]      FIG. 10B  shows a side profile view of an example of a self balancing tread of an exercise and sporting footwear apparatus according to various embodiments described herein. 
           [0035]      FIG. 10C  shows a side profile view of an example of a self balancing tread of an exercise and sporting footwear apparatus according to various embodiments described herein. 
           [0036]      FIG. 11  illustrates a side profile view of an example of a boot accessory mounted to a foot receiving member of an exercise and sporting footwear apparatus known as roller blades according to various embodiments described herein. 
       
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       [0037]    The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term “and/or” includes any and all combinations of one or more of the associated listed items. As used herein, the singular forms “a,” “an,” and “the” are intended to include the plural forms as well as the singular forms, unless the context clearly indicates otherwise. It will be further understood that the terms “comprises” and/or “comprising,” when used in this specification, specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. 
         [0038]    It should be understood that for the purposes of understanding the orientation of individual elements of the invention, the term “front” shall generally be used to indicate the positioning of a member or an element that when assembled in an exercise and sporting footwear apparatus is positioned substantially closer to the toe area of the footwear apparatus than to the heel area. 
         [0039]    It should also be understood that for the purposes of understanding the orientation of individual elements of the invention, the terms “rear” and “back” shall generally be used to indicate the positioning of a member or an element that when assembled in an exercise and sporting footwear apparatus is positioned substantially closer to the heel area of the footwear apparatus than to the toe box. 
         [0040]    Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one having ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present disclosure and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein. 
         [0041]    In describing the invention, it will be understood that a number of techniques and steps are disclosed. Each of these has individual benefit and each can also be used in conjunction with one or more, or in some cases all, of the other disclosed techniques. Accordingly, for the sake of clarity, this description will refrain from repeating every possible combination of the individual steps in an unnecessary fashion. Nevertheless, the specification and claims should be read with the understanding that such combinations are entirely within the scope of the invention and the claims. 
         [0042]    New exercise and sporting footwear apparatuses are discussed herein. In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be evident, however, to one skilled in the art that the present invention may be practiced without these specific details. 
         [0043]    The present disclosure is to be considered as an exemplification of the invention, and is not intended to limit the invention to the specific embodiments illustrated by the figures or description below. 
         [0044]    The present invention will now be described by example and through referencing the appended figures representing preferred and alternative embodiments.  FIG. 1  depicts an example of an exercise and sporting footwear apparatus (“the apparatus”)  100  according to various embodiments. In this example, the apparatus  100  comprises a foot receiving member  900  and a boot accessory  300  configured in this example to increase a user&#39;s ability to bounce, jump, and do plyometrics. The foot receiving member  900  is configured to secure to a user&#39;s right or left foot and is made from materials common in the art of athletic footwear and may preferably contain a hard plastic outer shell. A connection apparatus  800  is shown in this example which comprises a first interface assembly  901  located on the foot receiving member  900  and a second interface assembly  201  located on the boot accessory  300 . The connection apparatus  800  is configured to provide removable engagement and attachment between the foot receiving member  900  and a boot accessory  300 . In this example, the boot accessory  300  comprises an elongate tension member  109  with two rotation opposing assemblies  108 , a first resilient arched member  102  and a second resilient arched member  104 . Self balancing tread  120  mounted on substantially all of the ground facing surface of the second resilient arched member  104  is shown. 
         [0045]      FIG. 2  illustrates a side profile view of an example of an exercise and sporting footwear apparatus  100  according to various embodiments described herein. In this embodiment, the boot accessory  300  comprises a first resilient arched member  102  and a second arched resilient member  104  which may be made from resilient materials such as plastic, metal alloys, carbon fiber and other suitable materials capable of deforming under load and resuming their original shape upon removal of a load. The first resilient arched member  102  further comprises two end zones  103  with one end zone  103  located at the front side (e.g. toe side) of the first resilient arched member  102  and one end zone  103  located at the rear side (e.g. heel side) of the first resilient arched member  102 . The second resilient arched member  104  comprises two end zones  105  with one end zone  105  located at the front side (e.g. toe side) of the second resilient arched member  104  and one end zone  105  located at the rear side (e.g. heel side) of the second resilient arched member  104 . In preferred embodiments, a locking edge  107  is positioned on the terminus of each of the front and rear end zones  103  and on the terminus of each of the front and rear end zones  105 . Locking edge  107  is preferably formed by the ends of the first resilient arched member  102  and second resilient arched member  104  wherein the end is bent or formed at a substantially right angle and configured to contact raised edges  106 D within receiving pockets  106 C of connection element  106 . 
         [0046]    A front connection element  106  and rear connection element  106  are configured to removably secure the first resilient arched member  102  and the second resilient arched member  104  of the boot accessory  300  in the embodiment shown by  FIG. 2 . In this example, the connection element  106  comprises two receiving pockets  106 C and two raised edges  106 D which are configured to secure the locking edge  107  on an end zone  103  and the locking edge  107  on an end zone  105 . 
         [0047]    Still referring to  FIG. 2 , in preferred embodiments, a rotation opposing assembly  108  and a connection element  106  are integrally formed or permanently attached to the front and back of an elongate tension member  109 . In other embodiments, a rotation opposing assembly  108  may be temporarily or removably attached to a front connection element  106  and a back connection element  106  with both connection elements  106  molded into an elongate tension member  109 . The connection elements  106  may be made from durable and elastic materials such as silicone, rubber, plastic, or any other suitable material. 
         [0048]    The rotation opposing assemblies  108  may comprise lateral extension region  108 C and a ground contacting region  108 D both of which may be formed integral to rotation opposing assembly  108  or may be removably connected or secured to rotation opposing assembly  108 . In some embodiments, the lateral extension regions  108 C of various lengths may be temporarily or permanently attached to the rotational assembly  108  to position replaceable ground contacting regions  108 D closer or further from the ground surface ( FIG. 4 ). The ground contacting region  108 D may have a terminal end substantially planar in shape (shown by example in  FIG. 2 ), convex in shape, or any other geometric and non-geometric shape as suited for making contact with ground surfaces such as concrete and asphalt. 
         [0049]    Turning now to  FIG. 3  an exploded side profile view of an example of an exercise and sporting footwear apparatus  100  according to various embodiments is shown. In this example, the modular nature of the apparatus  100  is aptly illustrated. A first resilient arched member  102  and second resilient arched member  104  are configured to be temporarily attached to an elongate tension member  109  by way of two connection elements  106 . An optionally removable self balancing tread  120  is configured to be attached to the second resilient arched member  104 . The self balancing tread  120  provides a non-slip surface for contacting a ground surface. Suitable materials for the self balancing tread  120  include rubber, silicone, soft plastics, or any other material comprising the soles of footwear. In some embodiments, the self balancing tread  120  may be temporarily attached to the second resilient arched member  104  with a plurality of removable fasteners or other suitable temporary attachment, or permanently attached with glue, epoxy, heat bonding, chemical bonding, or any other suitable permanent attachment. 
         [0050]    In this embodiment, a second interface assembly  201 , comprising two or more male side walls  202 , is configured to be temporarily attached to the first resilient arched member  102 . In preferred embodiments, the second interface assembly  201  is configured to be permanently attached or integrally formed into the first resilient arched member  102 . 
         [0051]    In this example, the second interface assembly  201  located on the upper surface of the first resilient arched member  102  of this particular boot accessories  300  may be temporarily secured to a first interface assembly  901  of the foot receiving member  900 . In preferred embodiments, both the second interface assembly  201  and the first interface assembly  901  may be made from rigid and durable materials such as metal alloys, hard plastics, ceramics, carbon fiber, or any other suitable material. Also in preferred embodiments, one or more plate covers  905  are positioned over the first interface assembly  901  and attached to the sole region of the foot receiving member  900  to provide a non-slip surface for the user to walk on when wearing the foot receiving member  900  without an attached boot accessory  300 . Suitable materials for the plate covers  905  include rubber, silicone, soft plastics, or any other material comprising the soles of footwear. In preferred embodiments, the first interface assembly  901  is integrally formed or permanently attached to the foot receiving member  900 . In other embodiments, the first interface assembly  901  is temporarily attached to the foot receiving member  900  with a plurality of fasteners such as screw type, rivet type, and the like. 
         [0052]    The second interface assembly  201  is configured to slidably engage into a recessed opening  902  which is preferably formed by a substantially “C” shaped first interface assembly  901  which comprises two or more female side walls  903  which may be angled as shown by the figures. The female side walls  903  engage the complementary shaped male side walls  202  so that the boot accessory  300  may only be disengaged from the foot receiving member  900  by sliding each piece in opposite directions and preferably by sliding the boot accessory  300  in a lateral direction away from the foot receiving member  900 . 
         [0053]    In preferred embodiments, the sliding motion as discussed above is prevented by inserting a fastener  400  through a fastener aperture which passes through the first resilient arched member  102 , the second interface assembly  201 , and into the sole area of the foot receiving member  900 . The fastener  400  is preferably a threaded type fastener that may be tightened and loosened without the need for tools. In some embodiments, two or more fasteners  400  may be used to temporarily secure the boot accessory  300  to the foot receiving member  900  and may be made from rigid and durable materials such as metal alloys, hard plastics, ceramics, carbon fiber, or any other suitable material. 
         [0054]      FIG. 4  depicts two side profile views of an example of an exercise and sporting footwear apparatus  100  positioned on a ground surface  910  according to various embodiments. In  FIG. 4A , the apparatus  100  is depicted in a substantially level orientation with the sole of the foot receiving member  900  parallel to the ground surface  910 . In this example, the apparatus  100  comprises one or more rotation opposing assemblies  108  located proximate to the connection element  106 . The rotation opposing assembly  108  and its sub-regions or sub-components may be made from durable impact absorbing materials such as rubber, silicone, hard and soft plastics, or other suitable materials. 
         [0055]    As perhaps best illustrated in  FIG. 4B , the ground contacting region  108 D of the rotation opposing assembly  108  contacts the ground surface  910  to limit rotational movement of the apparatus  100  which could result in injury to the user. The limit of the rotational movement or rotational threshold of the apparatus  100  may be decreased by increasing the dimensions of the lateral extension region  108 C thereby decreasing the distance between the ground contacting region  108 D and the ground surface  910  when the apparatus  100  is rotated or pitched either forward or backward (e.g. towards the toe or heel side). Conversely, the limit of the rotational movement or rotational threshold of the apparatus may be increased by decreasing the dimensions of the lateral extension region  108 C thereby increasing the distance between the ground contacting region  108 D and the ground surface  910 . In some embodiments, rotation opposing assemblies  108  comprise larger dimensioned and smaller dimensioned lateral extension regions  108 C which may be temporarily or removably attached to the apparatus  100  and in particular to the connection element  106 . In some embodiments, the rotational movement may be limited to a larger degree, with larger dimensioned lateral extension regions  108 C, for novice users. In other embodiments, the rotational movement may be limited to a smaller degree, with smaller dimensioned lateral extension regions  108 C, for advanced users. Although  FIG. 4  provides an example of an apparatus  100  with two rotation opposing assemblies  108 , it is provided herein that the apparatus  100  may be configured with only one rotation opposing assemblies  108  located proximate to either the front connection element  106  or rear connection element  106 . In some alternative embodiments, the apparatus  100  may be configured without any rotation opposing assemblies  108 . 
         [0056]    Turning now to  FIG. 5 , three views are provided of the engagement of a first interface assembly  901  and a second interface assembly  201 .  FIG. 5A  illustrates a side profile view of an example of a first interface assembly  901  disengaged from a second interface assembly  201  according to various embodiments of the present invention. In this example, the female side walls  903  of the first interface assembly  901  are configured to contact and receive the male side walls  202  of the second interface assembly  201 . In this embodiment, female sidewalls  903  comprise a first female side wall which is sloped at a first angle relative to the plane of the sole region of the foot receiving member and a second female sidewall opposite to said first female sidewall  903  which is sloped at a second angle relative to the plane sole region of the foot receiving member ( 900 ). Said first female sidewall  903  and said second female sidewall  903  forming part of the perimeter wall for recessed opening  902  ( FIG. 5C ). Also shown by this example, a first male side wall is sloped at an angle corresponding to (i.e. at about the same degree of an angle) said first angle and a second male side wall is sloped at an angle corresponding to said second angle whereby said first male sidewall engages and rests upon said first female sidewall and said second male sidewall engages and rests upon said second female sidewall thereby preventing vertical movement between the first interface assembly  901  and second interface assembly  201  when they are engaged with one-another. 
         [0057]    Once the second interface assembly  201  is slidably engaged (i.e. slides into and is held in place) with the first interface assembly  901  as shown in  FIG. 5B , one or more fasteners  400  ( FIG. 5A ) may be used to prevent the interface assemblies from slidably disengaging and separating by inserting one or more fasteners  400  into one or more securing fastener apertures  203  ( FIG. 5C ) of the second interface  201  and into the footwear receiving member  900  ( FIGS. 1 ,  2 , and  3 ). Due to the angled nature of the female side walls  903  and the complementary angled male side walls  202  in this embodiment, the interface assemblies ( 901 / 201 ) may only be engaged and disengaged by sliding the second interface assembly  201  into and out of the recessed opening  902  of the first interface assembly  901  in a horizontal fashion and vertical movement is not permitted. 
         [0058]      FIG. 5C  illustrates a bottom up view of an example of a connection apparatus  800  comprising a first interface assembly  901  partially engaged with a second interface assembly  201 . The generally “C” shape of the first interface assembly  901  can be seen which forms a recessed opening  902  in which the second interface assembly  201  is configured to completely fill and occupy. In some embodiments, one or more mounting apertures  904  are configured to receive fasteners which may be positioned on the first interface assembly  901  and may be configured to secure the first interface assembly  901  to the footwear receiving member  900  ( FIGS. 1 ,  2 , and  3 ). In other embodiments, the first interface assembly  901  may be integrally formed into the footwear receiving member  900  ( FIGS. 1 ,  2 , and  3 ) or otherwise permanently attached with glue, epoxy, heat bonding, chemical bonding, or other substantially permanent attachment. 
         [0059]    Still referring to  FIG. 5C , in preferred embodiments, the shape of the recessed opening  902  is non-uniform in nature and may be formed by perimeter sidewalls of unequal length, of varying angles, shapes, grooves, etc. The male perimeter sidewalls  202  of second interface assembly  201  are configured to fit within the non-uniform sized recessed opening  902  in only one direction and orientation forming a keyed fit. 
         [0060]      FIG. 6  shows three side perspective views of an example of different engagement states between a foot receiving member  900  and an upper resilient arched member  102  of a boot accessory  300  ( FIGS. 1 ,  2 , and  3 ) comprising a second interface assembly  201  according to various embodiments of the present invention. 
         [0061]    To attach a disengaged footwear receiving member  900  and a boot accessory  300  ( FIGS. 1 ,  2 , and  3 ) as shown in  FIG. 6A , the second interface assembly may slide in, and is therefore is slidably engaged into, the recessed opening  902  as shown in  FIG. 6B . Once the second interface assembly  201  is fully engaged into the recessed opening  902  as shown in  FIG. 6C , a fastener  400  may be inserted through the securing fastener aperture  203  and secured into the footwear receiving member  900 . 
         [0062]    To detach an engaged footwear receiving member  900  and a boot accessory  300  ( FIGS. 1 ,  2 , and  3 ) as shown in  FIG. 6C , the fastener  400  is first unsecured from the footwear receiving member  900  and removed from the securing fastener aperture  203 . Next, the second interface assembly  201  is slidably disengaged out of the recessed opening  902  as shown in  FIG. 6B  until the footwear receiving member  900  is fully separated from the second interface assembly  201  of a boot accessory  300  ( FIGS. 1 ,  2 , and  3 ) as shown in  FIG. 6A . Note in this example and in preferred embodiments, second interface assembly  201  is configured to horizontally or laterally slide into first interface assembly  901  on foot receiving member  900 . Vertical movement between first interface assembly  901  and second interface assembly  201  is restricted by various means, for example, by having angled sidewalls ( 202 / 903   FIG. 5 ) on the interface assemblies. 
         [0063]    Turning now to  FIG. 7 , two side perspective views of an example of an elongate tension member  109  according to various embodiments of the present invention are depicted. The elongate tension member  109  is configured to be elastic in nature allowing it to longitudinally stretch when under load and then return to its original length when not under load. Suitable materials for the elongate tension member  109  include rubber, silicone, elastic plastics, metal springs, or any other suitable elastic material. 
         [0064]    Also depicted in  FIG. 7A  are a plurality of impact absorbing members  110  which are secured in a plurality of absorbing member cavities  111  ( FIG. 7B ). The impact absorbing members  110  are configured to prevent excess deformation of a first resilient arched member  102  and second arched resilient member  104  ( FIGS. 1 ,  2 , and  3 ) by contacting a first resilient arched member  102  and second arched resilient member  104 , absorbing the energy from an impact, and then rebounding the energy to aid the jump or bounce of a user. Suitable materials for the impact absorbing members  110  include rubber, silicone, elastic plastics, metal springs, or any other suitable energy absorbing and rebounding material. 
         [0065]    In preferred embodiments and as shown by  FIG. 7 , six impact absorbing members  110  may be temporarily secured within six absorbing member cavities  111  located within the elongate tension member  109  and allowing the user to remove and replace one or more impact absorbing members  110  as needed. In other embodiments, the impact absorbing members  110  may be permanently secured within the absorbing member cavities  111 . In further embodiments, the elongate tension  109  may be configured without impact absorbing members  110  or absorbing member cavities  111 . The impact absorbing members  110  may be configured to be slightly larger than the absorbing member cavities  111  so that compression secures them within the absorbing member cavities  111 . In some embodiments, the elongate tension member  109  may be configured with one, two, three, four, five, six, seven, eight, nine, or even ten absorbing member cavities  111  configured to hold one, two, three, four, five, six, seven, eight, nine, or even ten impact absorbing members  110 . 
         [0066]    The impact absorbing members  110  may comprise various shapes as illustrated in three exemplary embodiments depicted in  FIG. 8 . In some embodiments, one or more impact absorbing members  110  may terminate along the vertical axis in a substantially blunt pointed shape ( FIG. 8A ). In other embodiments, one or more impact absorbing members  110  may terminate along the vertical axis in a substantially flat shape with blunted corners ( FIG. 8B ). In further embodiments, one or more impact absorbing members  110  may terminate along the vertical axis in a substantially rounded shape ( FIG. 8C ). In still further embodiments, one or more impact absorbing members  110  may terminate along the vertical axis in any other shape that will not produce excessive wear on a first resilient arched member  102  and second arched resilient member  104  ( FIGS. 1 ,  2 , and  3 ). In yet still further embodiments, the one or more impact absorbing members  110  may have terminal ends of a non semi-elliptical shape. 
         [0067]    Referring now to  FIG. 9 , an example of a self balancing tread  120  according to various embodiments of the present invention is shown. The self balancing tread  120  comprises a plurality of raised tread contact points  124  and radial support platforms  122  which are configured to increase traction between the self balancing tread  120  and a ground surface  910 . In preferred embodiments, the self balancing tread  120  comprises four radial support platforms  122  arranged in a substantially circular shape ( FIG. 9A ). Each of the radial support platforms  122  preferably comprise a radial support platform sloped edge  123  configured to stabilize the self balancing tread  120  by being angled to provide a larger area of contact with a ground surface  910  when the self balancing tread  120  is in a flexed configuration as shown in  FIG. 9C . 
         [0068]    Another example of a self balancing tread  120  according to various embodiments of the present invention is illustrated in  FIG. 10 . In this embodiment, the self balancing tread  120  further comprises a raise central platform  121  to further increase traction between the self balancing tread  120  and a ground surface  910  in addition to the plurality of radial support platforms  122  and raised tread contact points  124 . Suitable materials for the raise central platform  121 , radial support platforms  122 , and raised tread contact points  124  include rubber, silicone, soft plastics, or any other material comprising the soles of footwear. In some embodiments, the self balancing tread  120  is configured to cover all or substantially all of the ground facing surface of the second resilient arched member  104 . In some embodiments, the self balancing tread  120  is configured to cover about 90% of the ground facing surface of the second resilient arched member  104 . 
         [0069]      FIG. 11  illustrates a side profile view of an example of a boot accessory  300  engaged to a foot receiving member  900  of an exercise and sporting footwear apparatus  100  according to various embodiments of the present invention. A plurality of boot accessories comprising a second interface assembly  201  are contemplated for attachment to a foot receiving member  900  comprising first interface assembly  901 . In this embodiment, the boot accessory comprises an in-line wheeled skating device comprising four wheels  301 . In other embodiments, any other type of footwear sporting device, such as ice skates, skis, snow shoes, etc. comprising a second interface assembly  201  may be attached to a footwear device  900  comprising a first interface assembly  901 . 
         [0070]    Although the present invention has been illustrated and described herein with reference to preferred embodiments and specific examples thereof, it will be readily apparent to those of ordinary skill in the art that other embodiments and examples may perform similar functions and/or achieve like results. All such equivalent embodiments and examples are within the spirit and scope of the present invention, are contemplated thereby, and are intended to be covered by the following claims.