| 摘要 |
The present invention is an exercise device comprising a flexor and a board. The present invention is also an exercise device comprising a flexor and an insert. The flexor has two arms, each of which has an end. The corresponding ends, one from each arm, are apart and the two arms are resistant to forces that tend to bring the corresponding flexible ends closer to each other. The board can be attached to one of the arms of the flexor. In another embodiment, the board can be attached to one of the arms of the flexor at different positions to provide different levels of resistance. The insert can stay between the two arms of the flexor and provide additional resistance to forces that tend to bring the corresponding ends of the two arms closer to each other.
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