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	            Primary Muscle Group: Rectus Abdominis
  Muscle Groups Worked in This Exercise:  Rectus Abdominis and Obliques
  Preparation: Place hands firmly on a stability ball about shoulder width apart as you lean forward with your body fully extended and supported by your feet and hands.  You will be in a diagonal pushup position, leaning forward.
  Breathing:  Breath out on the contraction of the muscle and breath back in on the way back to the start position.
  Execution: Once balanced in the extended position, drive your left knee upwards towards your chest and squeeze your core muscle group. Repeat and then switch legs.
	            
	            Here are a few suggested alternative exercises:
  Ball Bottoms-UpBall Bridge LiftBall DeadliftSide Lying ScissorsStep Ups on Bench
	            
							
							
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