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How to Do a Proper Crunch

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How to Do a Proper Crunch

L
Livestrong

10 Views • Dec 03, 2015

Description

How to Do a Proper Crunch. Part of the series: Exercise Applications. There are multiple types of crunches to do depending on your needs. Do a proper crunch with help from the first American physician/Orthopedic surgeon to write and demonstrate all exercises in a comprehensive fitness book in this free video clip.