- 1). Sit up straight on the edge of a chair without wheels with your knees bent and feet flat on the floor. If your chair has wheels, make sure you're on a surface where you chair does not slide easily, such as carpet.
- 2). Keep your back straight while you lean backward from your waist. Hold onto your chair seat using both hands.
- 3). Keep your knees bent and lift both legs. Keep your abdominal muscles tight as you would for a regular crunch.
- 4). Put your legs out straight with your heels a few inches from the floor. Return to the starting position.
- 5). Repeat steps 3 and 4 as many times as you can. Doing three sets of 10 repetitions each is a good start. If this is too challenging at first, try three sets of five repetitions each.
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