| 摘要 |
A compact portable abdominal exercise apparatus comprising a first member that concentrically slides in a second member, and resistance is provided by elastic attached between the distal end of the first member and the distal end of the second member. Handles position the user in an ergonomically neutral position that requires a user to crunch straight downward for the first member to slide properly within the second member. The straight downward crunching motion requires flexion of the user's lower vertebra column, thereby isolating the abdominal muscles from the hip flexors and back muscles. Molded covers protect the user from moving parts associated with the connector assembly. The elastic members can be quickly changed by the user.
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