| 摘要 |
An exerciser includes a board, a frame, a swing rod, an upper foot rest, a lower foot rest and a resilient rope. An upper end of the swing rod is articulated to an upper end of the vertical support and a lower end of the swing rod is fixed to a central portion of the lower foot rest. The resilient rope is connected between the swing rod and the vertical support. The board is fixed on the lengthwise beam of the frame. The lengthwise beam and the vertical support of the present invention form a triangular support. The board installed on the lengthwise beam is arranged obliquely. When the pin is inserted in the pin holes of the upper portion of the vertical support and the upper end of the swing rod, the swing rod won't swing relative to the vertical support of the frame for doing sit-ups. When the pin is pulled out from the pin holes of the upper portion of the vertical support and the upper end of the swing rod, the swing rod will swing relative to the vertical support of the frame. The resilient rope provides a damping force for doing exercise to get stronger leg muscles. The present invention has a simple structure and multiple functions.
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