This is a more popular ab exercise with the fitness ball.
- Lying on your back, have your knees bent, and your feet flat on the floor. Your arms should be straight up holding the ball between both hands.
- Exhale and lift the ball slowly up, keeping your arms straight. Stop just before the ball reaches your knees, hold for 2 seconds, and slowly lift back down. Continue with desired reps.
- Do 10-12 reps.