ab exercise

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Lying on your back, hold a weight (if lying on the floor) or the foot bar (if using the sit-up board). Keep the knees slightly bent. Pull your pelvis and legs up so that your knees are above your chest and then return to beginning position. Hanging Knee Raises: Grab the chin-up bar using both hands with a grip a bit wider than your shoulders, cross your ankles and bring your knees up to your chest or as close as you can get.