| 摘要 |
<p>An exercise device for a targeted workout of the abdominal and lower back muscles, which has a base member with a raised collar section, resilient means inside the collar, and upper member receivably located with respect to the collar section, in contact with the resilient means, and spaced from the base member by the resilient means, a gripping member attached to the upper member and adjustment means for adjusting the separation of the base member and that the upper member, whereby adjusting the separation compresses or decompresses the resilient means. The gripping member is rotated by the user against the frictional resistance supplied via the resilient means disposed within the device.</p> |
