Don't forget to breath in as you prepare and breath out as you crunch. Go slowly for more efficiency. If you don't feel secure on the ball at first keep your both feet on the ground or modifie and do it on the mat. Remember to not pull on your head. Hands are behind the head just for support.
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On Jan 01, 2013
On Jan 02, 2013
Go slowly for more efficiency. If you don't feel secure on the ball at first keep your both feet on the ground or modifie and do it on the mat. Remember to not pull on your head. Hands are behind the head just for support.
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