| 摘要 |
A resistance chair includes an elevated stationary seat with a front edge and a back edge. An arm is rotatably engaged with the back edge of the seat and is rotatable to a position below horizontal with respect to the elevated stationary seat. A back support is secured to the arm and supports the back of a user sitting on the elevated stationary seat. At least one resistance element is connected to the elevated stationary seat and urges the first arm to an upright start position and assists a user performing an abdominal crunch to return to an upright abdominal crunch position from a fully extended abdominal crunch position with the arm below horizontal with respect to the elevated stationary seat. The resistance element also resists against rotation of the arm away from the upright start position and resists against the user moving from the upright abdominal crunch position to the fully extended abdominal crunch position.
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