1. Start off by finding a suitable ball to use.
2. Next, place your legs on the ball and hold yourself up with your arms straight, your hands shoulder width apart, and keep the middle of your back raised.
1. Once in position, maintain a neutral spine and begin to roll the ball toward your arms by bringing your knees to your chest.
2. Your tips of your toes should be on the ball when in the crunched position.
3. After you finish your first crunch, return to the starting position and repeat.