I competed in bodybuilding at the national level and am a personal trainer for 25 years....just lying on the exercise ball will strengthen the core along w/ abdominal crunches. Go to this website:
www.spine-health.com/topics/conserv/rehab/ball/ball01.htm
This shows a lot of exercises that can be done with the ball.
Andro1111
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Charite @ L5,S1. W/Zeegers
March 11, 05. Successful.
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