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Uploaded by gymexercises on Apr 14, 2009
This is a demostration of how to perform jack knives for building strong abs. Go here for more info: http://www.criticalbench.com/exercises/abdominal-exercises.htm
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AND... that's enough exercise for TODAY! =P
Farlioz 1 year ago
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AND... that's enough exercise for TODAY! =P
Farlioz 1 year ago