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STX How To Abdominal crunch for core strength, hardcore exercise basics

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Uploaded by on May 8, 2009

Ab crunches increase the strength and function of the Rectus Abdominus muscle group, the largest and most visible ab muscles. Learn how to safely build your 6-pack with your spine safely supported on the floor. Crunches required no equipment and can be performed at home or at the gym. This is a 10 rep set exercise demonstration. This exercise is part of a full length workout video from the mypypeline.com advanced fitness program, STX Strength Training Extreme Series, Volume 1, Session 7.

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