Slide show: Core-strength exercises with a fitness ball
Photo of woman doing abdominal crunch exercise on fitness ball
Previous Next 3 of 10 Abdominal crunch

To do abdominal crunches with the fitness ball:

  1. Sit on the ball with your feet resting on the floor, about hip-width apart. Keep your back straight. Cross your arms on your chest.
  2. Tighten your abdominal muscles.
  3. Lean back, as shown, until you feel the muscles in your midsection tighten. Hold for three deep breaths.
  4. Return to the start position and repeat.
See more Multimedia May 11, 2016