EXERCISE SYSTEM
A rebounder comprising an encompassing frame has a platform suspended on the frame. The platform has a substantially rigid base and a pad of resilient material is secured on the base. A vertical handhold frame may have a directly attached handhold or a rotating handhold, which may be attached by elastic connections.
This is a continuation-in-part of application Ser. No. 11/412,309, filed Apr. 26, 2006, which is continuation of application Ser. No. 10/946,927, filed Sep. 21, 2004, now U.S. Pat. No. 7,060,001, which is a continuation of application Ser. No. 10/240,387, filed Sep. 27, 2002, now U.S. Pat. No. 6,846,271, which is the National Stage of International Application No. PCT/US01/41736, filed Aug. 14, 2001, which claims the benefit of Provisional Application No. 60/225,326, filed Aug. 14, 2000, all of which prior applications are incorporated herein by reference.
This also is continuation of application Ser. No. 11/860,447, filed Sep. 24, 2007, which claims the benefit of U.S. Provisional Application No. 60/846,526, filed Sep. 22, 2006, both of which prior applications are incorporated herein by reference.
BACKGROUND AND SUMMARYThis invention relates trampoline-type devices for physical exercise. Such devices commonly referred to as “rebounders,” typically are circular and have a relatively small diameter of about forty inches with a surface area available for jumping of about thirty inches or less. An example of one such device is shown in U.S. Pat. No. 7,094,181.
Like larger trampolines, such devices have a bed that is made of flexible fabric attached to an encompassing frame by springs. Although the bed of such a rebounder is quite resilient, it subjects the jumper's feet to severe pronation because the bed does not descend uniformly upon impact. Instead, the periphery of the bed remains near its original elevation upon impact from a jumper's foot while the center region of the bed descends a relatively much greater distance. The effect is similar to running on a severely banked roadway where a runner's foot is subject to unnatural stresses because it never lands on flat ground.
Jumping on full-sized trampolines is far less stressful because, due to its larger diameter, the bed of a full-sized trampoline typically is never at as steep an angle and because full-sized trampolines are used differently. With rebounders, the user is typically exercising in a way that produces numerous rapid footfalls, whereas use of a full-sized trampoline typically involves fewer and less frequent impacts.
Currently available rebounder-type devices do not fully allow the user to develop their spatial awareness, balance and coordination because of their restrictiveness. It is generally known in the art that bouncing exercise is excellent for developing spatial awareness, balance and coordination, especially for the elderly individuals with mild disability. However, because of the dynamic nature of the rebounding surface, many individuals require a handhold for stability. Rebounders with fixed handholds attached to the rebounder frame are known, but do not allow the user freedom of rotation while performing rebounding exercise.
Described herein is a rebounder having an encompassing frame supported by plural legs and a substantially rigid platform suspended on the frame. A pad of resilient material is secured above the platform. Also described is a vertical frame which may have a directly attached handhold and a rotating handhold attached by elastic connections.
In the drawings:
The platform may comprise several parts, including a base 20 that is substantially rigid and has a surface of minimal flexibility. The base should be of sufficient strength to support a user and, upon impact by a user's footfall, should not deflect or should deflect and bend less than the bend of conventional stretched trampoline fabric of comparable surface area and shape.
One embodiment of the base 20 is illustrated in
To avoid injury, a pad 24 of resilient material is positioned above the base 20 to absorb impact from a user's footfalls. The pad may be made of any sufficiently resilient and durable material, such as rubber foam, flexible polyurethane foam, or other flexible polymeric foams, such as a microcellular elastomeric foam of the type disclosed in U.S. Pat. No. 5,343,639, thermoplastic elastomer (TPE) foam such as flexible thermoplastic urethane foam, and the like. The pad may consist of a single layer or multiple layers of foam material, with or without a backing or surface skin. Different regions of the pad may have different densities and/or compositions as appropriate for a particular application. The pad may incorporate one or more pneumatic chambers or air pockets to add to the cushioning effect, or may include one or more chambers containing a gel material. The pad is best of substantially the same diameter as the base 20. The top surface of the base 20 conveniently is substantially planar and continuous. But in some embodiments the top surface of the base 20 may be textured, somewhat curved, or define openings to enhance support or inhibit the pad from shifting. The springs 22 and the pad 24 act together to absorb impact shock.
A cover 30 is provided over the illustrated pad 24 to hold the pad in place. The illustrated cover is sheet of flexible fabric shaped to fit over the pad 24 and at least a portion of the base 20. Snap sockets 28 at spaced locations along the periphery of the cover 30 mate with snap studs 26 on the base 20. With this arrangement, the cover can easily be removed for cleaning and for periodic replacement of the pad 24 if necessary. Pads 24 of different density and/or resiliency easily can be exchanged, by removing the cover 30, to tune the system for users of different weight.
The cover 30 can be omitted in some instances and the pad 24 secured in another manner. In particular, the pad 24 could be adhesively bonded to the upper surface of the base 20, secured by Velcro® hook and loop fastening material or through a variety of other types of mechanical fasteners, or could be secured to the base only along its perimeter as opposed to being entirely covered by a fabric cover or secured at its underside.
The base 20 and pad 24, with or without a cover 30, conveniently can be provided as a kit to retrofit existing rebounder frames from which the mat is removed.
Retrofitting of existing rebounders is also possible without removing the mat, which is more convenient if a user wants to switch back and forth between a standard rebounder surface and a harder deck surface. In such an arrangement (not shown), a substantially rigid base is secured on top of an existing rebounder mat such that the base rests on the mat and is directly or indirectly supported by the existing rebounder springs. A pad is located above the base and may be secured by any appropriate mechanism, for example by a flexible fabric cover of the type shown in the drawings. When a user jumps on the retrofitted rebounder, the mat, base, and pad all move up and down together with the extension and contraction of the springs, while the user's contact surface is always substantially horizontal. The added platform may be secured by straps that extend across the bottom of the mat, by fasteners at the perimeter of the platform that connect to the springs, by an encompassing drawstring or cinch mechanism that extends around the perimeter of the bottom of the mat and can be tightened like a belt, by adding a second layer of fabric or mat material on top of the platform and secured to the springs in a fashion similar to that of the lower mat, or by other forms of attachment.
Alternatively, a substantially rigid base can be secured below the existing mat of a standard rebounder. Here again the platform is directly or indirectly supported by the existing rebounder springs. A pad is located above the base, either above or below the mat. The elements are arranged such that when a user jumps on such a retrofitted rebounder, the mat, base, and pad all move up and down together with the extension and contraction of the springs, while the user's contact surface is always substantially horizontal. The platform may be secured by flat straps that extend across the top of the mat and below the pad, by fasteners at the perimeter of the platform that connect to the springs, or by other forms of attachment that position the platform to inhibit deformation of the mat.
It should be understood that a rebounder need not be circular, but could be oval, rectangular, or some other shape. In such cases the base and pad can be shaped appropriately to conform to the shape of the rebounder frame.
It should be appreciated that numerous variations are possible and the invention is not limited to the specific arrangements shown in the drawings.
Claims
1. An exercise system comprising:
- a frame;
- a bed including a base having an upper surface and a resilient pad located over the upper surface; and
- a plurality of elastic members connected between the bed and the frame.
2. The exercise system of claim 1, wherein:
- the base is substantially rigid; and
- the resilient pad rests on the upper surface of the base.
3. The exercise system of claim 1, wherein the pad comprises flexible elastomeric foam material.
4. The exercise system of claim 1 further comprising a cover over the pad.
5. The exercise system of claim 1, wherein the pad includes at least one pneumatic chamber.
Type: Application
Filed: Feb 8, 2008
Publication Date: Jun 5, 2008
Inventor: Mark W. Publicover (Saratoga, CA)
Application Number: 12/028,760