Slide show: Core-strength exercises with a fitness ball
Photo of woman doing advanced plank with fitness ball
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When you're comfortable doing the plank with the fitness ball, add the advanced plank for even more core strength:

  • Lie on the ball on your stomach, with your feet touching the floor behind the ball. Lean forward until you touch the floor with your hands.
  • Walk your hands away from the ball until you feel the ball reach your upper thighs (A). Keep your shoulders directly above your hands.
  • Tighten your abdominal muscles.
  • Push your body weight forward until your shoulders are in front of your hands and the ball is beneath your shins (B). Hold for three deep breaths.
  • Return to the start position and repeat.
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