Abstract:
An exercise apparatus for developing strength and flexibility of the arms, legs, back and abdominals of the user. The exercise apparatus is an adaptation of the exercise ball or Swiss ball. The exercise apparatus includes a large, spherically-shaped, resilient ball, a frame and a pair of connectors, the connectors rotatably connecting the ball to the frame. Various attachments may be placed on the frame to allow the user to grasp the apparatus or lock their feet to prevent unwanted motion. A mechanism can also be included in the connectors allowing the user to selectively adjust the rotation to a desired degree of resistance.

Description:
CROSS REFERENCE TO RELATED APPLICATIONS  
       [0001]     This application is a continuation-in-part of prior application Ser. No. 11/163,448, entitled, “Exercise Ball Mounted for Rotation” filed Oct. 19, 2005, the contents of which are herein incorporated by reference, which claims the benefit of U.S. Provisional Patent Application 60/594,463, filed Apr. 11, 2005. 
     
    
     FIELD OF INVENTION  
       [0002]     This invention relates to exercise devices. More specifically, this invention relates to a secured exercise ball where the exercise ball is mounted at diametrically opposed points to facilitate rotation about an axis.  
       BACKGROUND OF THE INVENTION  
       [0003]     An exercise ball is a large, spherical, resilient ball that can be used for a variety of exercises. These balls are also commonly referred to as a “Swiss ball”, “Swiss exercise ball”, “stability ball” or a “pilates ball.” The ball is often inflatable, made of vinyl or plastic. Alternatively, it may be made of a solid material such as foam rubber. The balls typically have a diameter ranging from 45 cm. to 75 cm. in 10 cm. increments. A user will choose a ball based upon their height, with a user of smaller stature choosing a ball having a smaller diameter. For instance, a person with a height in the range of 5′3″ to 5′8″ would be matched to a ball with a 55 cm. diameter. Persons having a height exceeding 6′3″ would be matched to a ball having a 75 cm. diameter.  
         [0004]     Exercise balls were originally used for therapeutic exercises, but have been more widely adopted in recent years to develop a user&#39;s flexibility, balance and strength, including the strength of seldom used stabilizer muscles. Exercise balls are typically used on the surface of a floor, with some portion of the weight of the user coming to rest upon the ball, thereby causing a deformation of the ball as it is pressed between the user and the floor. The resultant deformation adds a limited amount of resistance to the exercise. Used in this manner, the ball adds an element of instability to the exercise. This instability would not normally be experienced by a user with the associated exercise in the absence of the ball. Efforts by the user to counteract this instability and remain balanced on the ball allow the user to more fully exercise the body. One key cause of this instability is that the ball is not secured in any manner, other than by the weight of the user. Consequently, the ball is free to travel in any two dimensional direction by means of rotation across the horizontal plane created by the underlying floor.  
         [0005]     The inherent characteristics of exercise balls have led to the recognition of numerous therapeutic uses for them. Due in part to these uses and characteristics, exercise balls have been incorporated into a number of exercise devices and other articles. U.S. Pat. No. 5,810,700 to Orcutt discloses an exercise apparatus utilizing a resilient ball and having a flexible strap assembly surrounding the ball. The flexible strap assembly coupled to the ball provides resistance for performing exercises. The resilient ball is designed to be used by a user in a seated position atop the ball, or otherwise with the user resting a portion of his or her body on the resilient ball, while pulling the resistance member in an elongation direction. The strap assembly includes first and second straps adapted to surround and couple to the resilient ball. A loop formed from one of the straps receives the resistance member. While providing additional exercises for use with an exercise ball, this device does not address the inherent instability of exercise balls.  
         [0006]     U.S. Pat. No. 6,309,331 B1 to Raymond discloses an abdominal exerciser device utilizing a resilient rubber ball in contact with a plurality of ball bearings across the lower half of the ball. The ball is mounted inside a semi-spherical cavity that roughly corresponds in height to the lower half of the ball. Thus, a self-standing casing is formed to support the ball while allowing the rubber ball a free-rolling action when applied against a body part such as the abdominal, waist and/or hips effectively pressuring and massaging the muscles of the body part. It is further taught that one or more casings may also be mounted on absorbing materials, which is further mounted onto a rigid frame structure adapted to support a user. U.S. Pat. No. 6,669,611 B2, also to Raymond, discloses a similar abdominal exerciser.  
         [0007]     U.S. Pat. No. 6,746,372 B2 to Hsu discloses an exercising ball holder for fixing an exercising ball. The holder is a concave device that cups the lower portion of an exercise ball. The holder further includes a base structure having multiple extension arms and at least one elastic cord attached thereto. The base seat is formed with a rest depression. A lower end of the exercising ball is rested and located in the depression preventing the ball from easily rolling out in response to directly downward pressure. The ball is free to be lifted out of the device and may be dislodged by forces applied from a side. The multiple extension arms extend outwardly from beneath the holder and have a fixing loop section at their respective ends for affixing the elastic cords. The elastic cords have handles at the ends opposite to where they affix to the base. The elastic cords are thus adapted to function as resistance members to be grasped by the hand of a user.  
         [0008]     Other patents disclosing chairs or exercise devices incorporating exercise ball-like objects, or variations thereof, include U.S. Pat. No. 4,126,326 to Phillips, U.S. Pat. No. 5,690,389 to Ekman et al., U.S. Pat. No. 5,833,587 to Strong et al., U.S. Pat. No. 6,461,284 B1 to Francavilla, U.S. Pat. No. 6,478,721 to Hunter and U.S. Pat. No. 6,702,726 to Lin.  
         [0009]     As discussed above, exercise balls are useful tools for exercise, but suffer from a number of limitations as a result of their ability to roll in any direction along the horizontal plane. Exercise balls are inherently unstable. Often this instability is not desired by the user. This instability often makes it more difficult to isolate the desired muscle group or groups intended by a particular exercise motion. The feeling of instability can be unnerving to inexperienced users and may even lead to injury due to loss of balance or when otherwise used improperly. This is especially true if the user suffers from a physical ailment or handicap. Additionally, the primary source of resistance during certain exercise is the compressed nature of the weight-bearing ball. One means for adjusting the resistance is to alter the inflation of ball. Deflating the ball results in an increased resistance to rotation. Unfortunately, this results in a concomitant reduction in support to the user. As such, it is difficult to adjust the resistance to tailor it to the exercise and the user&#39;s needs. Finally, because the ball is not secured by any means, it is difficult to firmly stabilize an isolated part of the user&#39;s body, such as the user&#39;s feet or hands, so as to apply a significant amount of force to be exerted during the motion of the exercise. Thus, what is needed is an exercise apparatus that overcomes these limitations.  
       SUMMARY OF INVENTION  
       [0010]     An exercise apparatus including an exercise ball mounted for rotation is provided. In an advantageous embodiment the exercise apparatus utilizes an exercise ball mounted at diametrically opposed points for rotation about a central axis defined by the diametrically opposed points. The apparatus allows a user to perform many of the exercises typically performed on a conventional exercise ball with added element of stability not possible in balls that are free to rotate in all directions across a plane. This can be particularly useful to a user trying to isolate certain muscle groups or a user with injury desiring to perform certain exercise commonly performed with an exercise ball but unable to counter, or fearful of, the additional movement of an unsecured ball. In addition, due to the secured nature of the exercise ball, new exercises are possible.  
         [0011]     In certain embodiments the ball is mounted for substantially 360 degree rotation about the axis while supporting the weight of the user. By allowing complete rotation the entire circumference of the ball is available to the user. This allows, among other things, complete extension by the user when performing exercises. In still further embodiments the exercise ball has one or more massaging elements adapted to provide a massaging effect to a user performing exercises thereon. This can be particularly useful to a user suffering back discomfort. It is also found to be an aid while performing stretches and the like while using the apparatus. The massaging element can be a surface texture arranged about the surface of the ball. In certain embodiments the surface texture is pebbled protrusions. Alternatively, spiked protrusions can be used. In still further embodiments the massaging element can be a vibratory member arranged in proximity to the surface of the exercise ball. A vibrating effect would then be imparted upon the user as the user is supported by the ball. The vibrating effect would serve to massage the user. In still further embodiments the rotation of the exercise ball about the central axis can be selectively adjusted to provide varying degrees of resistance. By adjusting the resistance the user can tailor the apparatus to his or her particular needs and the exercise being performed. For instance, a user performing a “squat” exercise might desire some resistance to rotation to fully exercise their legs. In contrast, the user might prefer a much greater amount of rotation when using the apparatus to perform sit-ups. In still further embodiments the ball may include a heating element to heat the surface of the user support means. This can beneficial to a user with an injury or a user using the apparatus to stretch.  
         [0012]     Also provided according to a further aspect of the present invention is an exercise apparatus having a user support means adapted to support a user performing exercises thereon, an axle, the user support means mounted for rotation on the axle, and a frame engaging the axle, the frame rotatably supporting the user support means in vertically spaced relation to a support surface. The user support means can have a shape such as a substantially spherical ball, an ovoid ball and cylindrical roller. In certain embodiments the user support means can be selectively adjusted to provide varying degrees of resistance. A locking mechanism may also be incorporated with or without the selective adjustment to selectively prevent rotation. The frame can include a base. The base enhances the stability of the exercise apparatus on the support surface. In certain embodiments the base is an elongated base of adjustable length. In still further embodiments at least one attachment member can be affixed to the frame. The attachment member can be a handle adapted to be engaged by a hand of a user. The attachment member can also be a foot rest adapted to be engaged by a foot of a user.  
         [0013]     According to yet another aspect of the present invention there is provided an exercise apparatus having a frame, a user support means adapted to support a user performing exercises thereon, and a pair of connectors in diametrically opposed relation, the connectors connecting the user support means to the frame, the frame supporting the user support means in vertically spaced relation to a support surface. The connectors can rotatably connect the user support means to the frame. In certain embodiments the connectors can be selectively adjusted to provide varying degrees of resistance. The user support means can adopt the shape of a substantially spherical ball, an ovoid ball and cylindrical roller. In certain embodiments the frame includes a base to enhance the stability of the exercise apparatus on a support surface. The base can be an elongated base of adjustable length. The exercise apparatus can include at least one attachment member affixed to the frame. The attachment member can be a handle adapted to be engaged by a hand of a user. The attachment member can also be a foot rest adapted to be engaged by a foot of a user. 
     
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0014]     For a fuller understanding of the invention, reference should be made to the following detailed description, taken in connection with the accompanying drawings, in which:  
         [0015]      FIG. 1  is an illustration of a perspective view of one embodiment of the exercise ball mounted for rotation.  
         [0016]      FIG. 2  is an illustration of a top plan view of the embodiment of the invention depicted in  FIG. 1 .  
         [0017]      FIG. 3  is an illustration of a right side elevation view of the embodiment of the invention depicted in  FIG. 1 .  
         [0018]      FIG. 4  is an illustration of a left side elevation view of the embodiment of the invention depicted in  FIG. 1 .  
         [0019]      FIG. 5  is an illustration of a front elevation view of the embodiment of the invention depicted in  FIG. 1 .  
         [0020]      FIG. 6  is a rear elevation view of the embodiment of the invention depicted in  FIG. 1 . In this view the exercise ball is partially cut-away to illustrate an axle passing through the ball.  
         [0021]      FIG. 7  is a perspective view illustrating the use of the embodiment as shown in  FIG. 1  in performing a squat exercise by a user where the user is depicted in the squatted position with knees bent  
         [0022]      FIG. 8  is a perspective view illustrating the exercise depicted in the  FIG. 7  where the user is depicted out of the squatted position with legs in the extended position.  
         [0023]      FIG. 9  is a perspective view illustrating an alternative embodiment of the invention depicted in  FIG. 1 . Illustrated is the addition of rotation resistance devices attached to the base of the apparatus.  
         [0024]      FIG. 10  is a perspective view illustrating an alternative embodiment of the invention depicted in  FIG. 1 . Illustrated is the addition of an adjustable rotation resistance device to alter the ball&#39;s resistance to rotation. In this view the exercise ball is partially cut-away to illustrate the support members. The figure further directs attention to the top of the support members wherein the rotating axle is affixed to the support members as illustrated in greater detail in  FIG. 11 .  
         [0025]      FIG. 11  is a perspective view illustrating an adjustable rotation resistance device to alter the ball&#39;s resistance to rotation.  
         [0026]      FIG. 12  is an illustration of a perspective view of one embodiment of the exercise ball mounted for rotation. The embodiment includes massaging elements arranged about the surface of the exercise ball.  
         [0027]      FIG. 13  is a partial view of the embodiment of the exercise ball mounted for rotation as shown in  FIG. 12 . The partial view illustrates the surface of the ball and the pebbled or rounded protrusions on the surface. 
     
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT  
       [0028]      FIG. 1  shows an exercise device  10  according to an exemplary embodiment of the present invention. Exercise device  10  includes a user support means in the form of a substantially spherical, resilient ball  20  attached to a frame  40 . The ball is adapted to support the weight of a user while the user performs exercises. It is contemplated that the user support means can adopt a shape other than that of a substantially spherical ball. For instance, the shape could be ovoid or cylindrical. The frame  40  rotatably supports the ball in vertically spaced relation to a support surface. The frame  40  includes a pair of longitudinally disposed base members  50  disposed in substantially parallel orientation in relation to one another. The front of the frame  40  includes a leading transversely disposed base member  60  that interconnects the respective leading ends of the pair of longitudinally disposed base members  50 . The rear of the frame  40  includes a trailing transversely disposed base member  70  that interconnects respective trailing ends of the pair of longitudinally disposed base members  50 . Taken together, the pair of longitudinally disposed base members  50 , the leading transversely disposed base member  60  and the trailing transversely disposed base member  70  form the base of the device shown in the exemplary embodiment.  
         [0029]     Extending upward from the base of the frame  40  are a first pair of support members  80  secured to a first longitudinally disposed base member of said pair of longitudinally disposed base members  50 . The frame  40  includes a second pair of support members  90 , one member of said pair not visible in this view, secured to a second longitudinally disposed base member of said pair of longitudinally disposed base members  50 . The first pair of support members  80  have respective first ends  82  secured to the first longitudinally disposed base member in longitudinally spaced apart relation to one another and have respective second ends  84  that abut one another. The respective second ends  84  are vertically spaced relation to the respective first ends  82 . Thus, the first pair of support members  80  form an inverted “V” configuration. The second pair of support members  90  have respective first ends  92  secured to the second longitudinally disposed base member in longitudinally spaced a part relation to one another and have respective second ends  94  (not visible in this view) that abut one another. The respective second ends  94  are vertically spaced relation to the respective first ends  92 . Thus, the second pair of support members  90  also form an inverted “V” configuration. It is contemplated that the extent of the support members will be adjustable to facilitate altering the height of the ball relative to the support surface. The adjustment also allows balls of differing diameters to be used in the apparatus to adapt to the height and other proportions of the user. It is further contemplated that support members  80  and  90 , rather than being a pair of support members on each side of the device, will be formed of a single member on each side of the ball. In such an embodiment the support members form an “I” configuration. The respective second ends would be vertically spaced relation to the respective first ends. Constructed in this manner, the exercise apparatus will have fewer parts, making it lighter, and the common extent of the first pair of support members  80  and second pair of support members  90  will be more easily adjustable.  
         [0030]     As indicated above, the first  80  and second  90  support members have a common extent. The common extent is at least slightly greater than a radius of the substantially spherical ball  20  so that the substantially spherical ball  20  is free to rotate about an axis defined between the diametrically opposed points. A brace  120  joining support member  80  and support member  90  provides additional rigidity to the frame.  
         [0031]     The exercise apparatus  10  has a first rotatably mounted connector  86  disposed at an apex of said first pair of support members  80 . The exercise apparatus  10  has a second rotatably mounted connector  96  (not visible in this view) disposed at an apex of the second pair of support members  90  in diametrically opposed relation to the first apex. The substantially spherical ball  20  is positioned between the first  80  and second  90  pair of support members. The first  86  and second  96  (not visible in this view) rotatably mounted connectors engage the substantially spherical ball  20  at diametrically opposed points on the substantially spherical ball  20 . Mounted in this manner, 360° rotation of the ball in the desired axis is possible. Furthermore, rotation in all other axes is eliminated.  
         [0032]     The first  86  and second  96  rotatably mounted connectors may include a mechanism whereby the resistance to rotation may be selectively adjusted. Referring to  FIG. 10  there is shown an embodiment of the invention having an adjustable rotation resistance device whereby the resistance to rotation may be selectively adjusted.  FIG. 11  shows a close-up of the mechanism. The axle  30  is supported at the junction of pair of support members  90  at the second ends  94  of the support members. Sitting above the axle  30  is a pad  162 . Plate  160  sits above the pad and links each support member  90  at their respective second ends  94 . It is found advantageous to provide a pad  162  that has friction reducing properties such that the axle is firmly held while rotating without substantial noise. It is found that the degree of rotation can be limited by tightening the knobs  164  which results in a compression of pad  162  by plate  160 . An alternative embodiment would replace the two knobs  164  with a single knob at the apex of the plate  160  and a pair of screws or other fasteners to affix the plate  160  to the support members  90 . An additional small plate could be placed between the pad  162  and the plate  160 . The additional small plate would place a compressible force on the pad  162  when adjusted by the knob  164 . The knob  164  and the additional small plate could be linked by a screw threaded through plate  160 .  
         [0033]     Numerous other means for adjusting the resistance to rotation are possible. These can includes friction devices, magnets, and spring-loaded devices. A contemplated friction device would forcibly engage the connector in an adjustable manner. The applied pressure or degree to which the friction device engages connector would be proportionally related to the resistance to rotation of the ball in response to an applied rotational force. When the rotation adjusting device, be it a friction device or other, is disengaged, or at its minimal setting, the resistance to rotation created by the rotation adjusting device can be negligible. When adjusted to a maximal setting, the resistance to rotation created by the rotation adjusting means can completely prevent the ball from rotating. Additionally, a locking device can be included to prevent the ball from rotating when rotation is not desired. It is contemplated that an advantageous locking device can be incorporated at the connector.  
         [0034]     Referring to  FIG. 6 , an illustration of an exemplary embodiment of the exercise ball mounted for rotation is presented whereby the ball  20  is shown in cutaway to illustrate an axle  30  passing through the center of the ball. In this embodiment, the resilient ball is secured to the axle at diametrically-opposed points on the peripheral surface of the sphere. The axle is a central shaft for the rotating user support means. In some cases the axle may be fixed in position with a bearing, bushing or other mechanism sitting inside the hole in the ball or other user support means to allow for rotation of the user support means around the axle. In other cases the ball or other user support means may be fixed to the axle, with rotation provided at the mounting points where the axle is supported. It is further contemplated that the ball could be statically mounted on the central shaft, or other connector, thus preventing all rotation. This would be advantageous where a rounded object such as an exercise ball is desired, but it is further desired to eliminate all rotation, thus creating a static device, while also providing a rounded support surface that will not dislodge or otherwise move.  
         [0035]     As discussed above, the exemplary embodiment depicted in  FIG. 6  utilizes an axle passing through the center of the ball. With a sufficiently stiff axle, it is possible to secure the ball to the base  40  with a single support member on only one side of the user support means, rather then having support members on both sides.  
         [0036]     Additional modes of connecting the ball are possible. The ball could be connected by a pair of connectors at diametrically opposed points without having an axle passing through the ball to link the connectors. The connectors attach the user support means to the frame and prevent dislodgement of the user support means during exercises. In such an embodiment, the absence of an axle would reduce the stiffness of the device. It may be desirable to regain some of the lost stiffness by adding one or more braces or gussets such as the brace  120  connecting the first  80  and second  90  pair of support members.  
         [0037]     The exemplary embodiment utilizes a substantially spherical ball  20  as the user support means. The user support means is of round shape about the length of the shaft, axle or other axis of rotation and is adapted to support the weight of a user. The rounded shape of the substantially spherical ball is found to be particularly advantageous, although other shapes are possible. These shapes can include a ball having an ovoid shaped user support means and roller having a columnar-shaped user support means. The ball in the exemplary embodiment is a large, inflatable ball approximately 45 cm. to 85 cm. in diameter. The ball, or other user support means, can be smooth or it can have a textured surface to minimize slippage between the user and the ball. In the exemplary embodiment the ball has a series of parallel ridges around the circumference of the balls. It is found that such ridges aid in preventing slippage of a user from side-to-side on the device during use. When an inflatable ball is used, for safety reasons the ball is constructed from a resilient, puncture-resistant material which, when punctured, deflates slowly. Alternatively, the ball can be constructed of a solid material such as foam rubber or the like. It is further contemplated that the solid ball could sit on the axle maintaining continuous contact with the axle for the extent of the axle&#39;s passage through the ball. Similarly, an inflatable ball could maintain continuous contact with the axle by adopting an inner-tube like structure. The axle would then pass through the small hole in the center, with continuous contact between the axle and the tube for the extant of the axle&#39;s passage through the hole in the center of the tube. The ability to separately control the resistance to rotation and the inflation level of the ball allows the properties of the device to be custom tailored in ways that are not possible with a standard exercise ball.  
         [0038]     Referring again to  FIG. 1 , the device can further include one or more attachment members  100  affixed to the frame. The attachment members can be affixed to the frame at numerous locations including the pair of longitudinally disposed base members  50  or the leading transversely disposed base member  60 . For instance, a pair of attachment members can be affixed to the frame at the leading transversely disposed base member  60 . The attachment member can be a handle adapted to be grasped by hands of a user. In such a configuration a user would be able to perform exercises such as a push-up on the device by grasping the handles and placing his legs atop the ball. The push-up can then be performed by a lowering motion of the body facilitated by a bending of the elbows. Alternatively, the attachment member can be a foot rest adapted to the engaged by a foot of a user handle adapted to be grasped by hands of a user. In this a configuration a user would be able to perform exercises such as a sit-up on the device with a degree of stability well beyond that which can be achieved by a conventional exercise ball. Also contemplated are attachment members that are resistance devices. These can include elastic bands, springs, pulleys and other objects that provide resistance in response to the applied force of a user. For example, bands constructed of a resilient material could be affixed to the frame to allow a user to perform various extension and contraction exercises, such as bicep curls or tricep extensions, while positioned on the apparatus. It is also contemplated that these members could pass through a frame having a tubular structure to provide a streamlined effect and to isolate the moving parts of the attachment from the user to minimize the likelihood of injury.  
         [0039]      FIG. 1  shows an embodiment of the apparatus having an elongated base of adjustable length formed by the pair of longitudinally disposed base members  50 , a leading transversely disposed base member  60  and a trailing transversely disposed base member  70 . Referring to  FIG. 3  it is illustrated that the longitudinally disposed base members are formed by a trailing section of the longitudinally disposed base member  50   b  that slidingly receives a leading section of the longitudinally disposed base member  50   a . The length of the pair of longitudinally disposed base members  50  can be adjusted by sliding the leading segments of the longitudinally disposed base members  50   a  into or out of their respective trailing portions segments of the longitudinally disposed base members  50   b . Once the desired position is achieved, this position may be secured by locking the releases  110 .  
         [0040]     Referring to  FIG. 7 , an illustration of an exemplary embodiment of the exercise ball mounted for rotation  10  is presented whereby a user  150  is performing a squat exercise. The user  150  has his weight supported by having his upper back in contact with the exercise ball  20 . The user&#39;s feet  152  are optionally secured by the attachment members  100  affixed to the leading transverse base member  60 . The user&#39;s knees  154  are flexed position placing the user in a squatted position. From this point the user will exert force with the muscles of the legs and buttocks, principally the muscle groups of the quadriceps, hamstrings and gluteus maximus, causing an extension of the user&#39;s legs and reducing the flexion of the user&#39;s knees  154 . As the user performs this motion, the exercise ball  20  will rotate in a clockwise direction in relation to the view depicted in  FIG. 7  and the user will arrive in the position depicted in  FIG. 8 .  FIG. 8  is another illustration of the exercise depicted in  FIG. 7  with the user  150  in a more extended position in the squat exercise relative to the position depicted in  FIG. 7 . It can be seen that the user&#39;s feet  152  remain secured by the attachment members  100 , although it is now the user&#39;s buttocks and lower back that are in contact with the exercise ball. Additionally, the flexion in the user&#39;s knees  154  has been reduced. It should be apparent from the foregoing that a multitude of other exercises are possible with the invention.  
         [0041]     Referring to  FIG. 9 , an illustration of an exemplary embodiment of the exercise ball mounted for rotation is presented whereby an embodiment is depicted with resistance bands  130  affixed within the longitudinally disposed base members  50  and exiting at the junction of the longitudinally disposed base members  50  with the leading transversely disposed base member  60 . Resistance releases  136  slidingly secure the resistance bands  130  the within the longitudinally disposed base members  50 . By sliding the resistance releases  136  along the longitudinally disposed base members  50  the length of the exposed portion of the extension  132  of the resistance bands  130  can be adjusted. When the desired length is achieved the resistance releases  136  can be secured in place. The resistance bands  130  may include a handle  134  adapted to be grasped by the hand of a user. It is further contemplated that the resistance bands can be interchanged based upon a user strength and preference as to the amount of resistance offered by the device. It is contemplated that the resistance bands  130  can be used for various exercises such as curls, where the user places his knees adjacent to the trailing transversely disposed base member  70  while resting his chest upon the ball  20  and grasping the handles  134  with his hands. In an advantageous embodiment the extension  132  of the resistance bands will be composed of an elastic material. It is also possible that resistance could be provided by coupling the bands to a spring or a pulley mechanism.  
         [0042]     Resistance bands  140  are also depicted in the illustration. Resistance bands  140  are affixed within the longitudinally disposed base members  50  and exiting at the junction of the longitudinally disposed base members  50  with the trailing transversely disposed base member  70 . Resistance releases  146  slidingly secure the resistance bands  140  within the longitudinally disposed base members  50 . By sliding the resistance releases  146  along the longitudinally disposed base members  50  the length of the exposed portion of the extension  142  of the resistance band  140  can be adjusted. The resistance bands may include a handle  144  adapted to be grasped by the hand of a user. It is contemplated the resistance bands  140  can be used for various exercises such as a chest fly, where the user places his feet adjacent to attachment members  100  while resting his back upon the ball  20  and grasping the handles  144  with his hands.  
         [0043]     It is further contemplated that the ball could be heated as an aid to the user. The therapeutic properties of exercise balls are well-known. These balls are frequently used in stretching and recuperation from injuries involving range of motion. By incorporating a heating element, such as those found in thermal electric heating pad systems used for patient warming applications, a great benefit can be achieved for user comfort. It would be especially advantageous to include a control unit to selectively adjust the temperature of the thermal unit to achieve the desirable level of heat.  
         [0044]     Embodiments of the exercise apparatus may further include elements to massage the user at the point of contact with the ball. Referring to  FIG. 12 , an illustration of an exemplary embodiment of the exercise ball  10  having massaging elements  24  on the surface  22  of the exercise ball  20  is shown.  FIG. 13  shows the massaging elements  24  in greater detail. These massaging elements may be provided through a textured surface on the exercise ball. Such surfaces can include a pebbled surface, as shown in  FIGS. 12 and 13 , or a surface having spiked protrusions arranged about the surface of the ball. A user would adopt a position where their weight is supported by the surface of the ball. Force can then be exerted by the user resulting in rotation of the ball. The pebbled or spiked protrustions would compress the soft tissue of the user as the ball rotates across the user&#39;s back creating a massaging effect. The pebbled or spiked protrustions could be integral to the surface of the ball or could be provided by an additional layer removably affixed to the surface of the ball. The massaging elements  24  in the exemplary embodiment of  FIG. 12  are evenly distributed about the surface of the exercise ball. It would also be possible to localize the massaging elements to those portions of the exercise ball that contact the user, while the remainder of the ball is smooth. An alternative means of providing the massaging effect would be through the incorporation of a vibratory massager arranged about the surface of the exercise ball.  
         [0045]     The disclosure of all publications cited above are expressly incorporated herein by reference, each in its entirety, to the same extent as if each were incorporated by reference individually.  
         [0046]     It will be seen that the advantages set forth above, and those made apparent from the foregoing description, are efficiently attained and since certain changes may be made in the above construction without departing from the scope of the invention, it is intended that all matters contained in the foregoing description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.  
         [0047]     It is also to be understood that the following claims are intended to cover all of the generic and specific features of the invention herein described, and all statements of the scope of the invention which, as a matter of language, might be said to fall therebetween. Now that the invention has been described,