| 摘要 |
A portable resistance-type exercise apparatus has a hinged, padded platform to support the head and back, a rigid frame including two curved tubes running along either side of the platform, and an elastic cord disposed inside each tube. Each elastic cord has a hand grip for allowing the user to grip the cords securely when doing abdominal exercises. To use the apparatus while doing an abdominal crunch, the user holds onto the hand grips and lifts the torso while pulling the hand grips away from the head and toward the knees at the same time. The obliques can be exercised in a similar manner, by pulling the grip toward the opposite knee while lifting and twisting the torso. The resistance provided by the elastic cords increases the effort required to lift the torso, strengthening the abdominal muscles more quickly than conventional abdominal crunches. The apparatus can also be attached upright to a chair for exercising different muscles in the arms, shoulders and back by changing the direction in which the elastic cords are pulled. An alternative embodiment of the invention has a U-shaped frame and a supporting cross member, wherein a single elastic member is threaded through the U-shaped frame and a handgrip is attached to each end of the elastic member.
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