STABILITY BALL JACK-KNIFE

This predominately works your core. Make sure you brace your abs and do not let your back sag.

  1. Put your elbows on the bench and rest your shins on the ball.
  2. With your upper arms straight and your back flat, your body should form a straight line from your shoulders to your ankles.
  3. Keeping your back straight, slowly roll the ball as close to your chest as possible by contracting your abs and pulling it forward.
  4. Pause briefly and then return the ball to the starting position by rolling it backward.
  5. Hold the extended position for 5 seconds and repeat.
Posted on: August 24th, 2012
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