| 摘要 |
<p>An abdominal exercise device and a method of operation allow for isolation of particular muscle groups. The exercise device has a main housing with an interior and exterior, a spherical ball is encapsulated within the interior of the main housing and grips are attached to the exterior of the main housing. The grips are configured to allow usage of the user' s lower and upper extremities individually or concurrently.</p> |
