back extension

  1. Lie face down on top of a stability ball with your arms behind your head and your feet in a wide stance. Lean forward and lengthen your body so your torso is resting against the ball and you’re firmly balanced on your toes.
  2. Lift your chest upward as much as you can, hold a moment, and then slowly lower back down allowing yourself to curl around the ball.
  3. Do this as many times as possible for 60 seconds.

 

Modification: Decrease your range of motion