| 摘要 |
An exercise machine for strengthening the abdominal and back muscles of a user has a frame that includes a front leg pivotally connected to a rear leg. The exercise machine also includes a seat and a backrest for supporting the back of a user during an exercise routine that is adjustably positioned and secured with respect to the seat. The backrest is adjustably flexible in order to provide resistance to the movement of a user in order to help strengthen the user's abdominal and back muscles. The backrest includes handles to facilitate engagement between the backrest and the user and to encourage the user to move against the adjustable resistance provided by the backrest. The exercise machine includes a non-use, storage mode that facilitates storage of the exercise machine.
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