Abdomen and back muscle strengthening device, has changeable footrest movably supported at base frame, where footrest and rear part are staying in effective connection with one another for simultaneous movement

摘要

The device has a base frame (10), and a seat part (11) fastened in the base frame and serving as seat surface for a user. A rear part (12) is arranged in the base frame, and is rotatably supported against the seat part. A force applying part applies force supporting exercise of the user, where the force is effective during rotation movement of the rear part. A changeable footrest (14) is movably supported at the base frame, where the footrest and the rear part are staying in effective connection with one another for simultaneous movement.