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Search: Posts Made By: William Jackson
Forum: Exercises 06-23-2009, 05:07 PM
Replies: 16
Views: 3,389
Posted By William Jackson
Re: back extention is not a functional movement.

i think that statement was made because the spinal erectors primary goal is to maintain spinal extension in our natural "S" curve, not to contract into spinal extension under load (think rounded back...
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