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Co-Administrator
Community Support Team
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Join Date: Aug 2006
Posts: 27,711
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Co-Administrator
Community Support Team
Join Date: Aug 2006
Posts: 27,711
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Hmm, I'm thinking must be some sort of semi isometric motion of "squishing" the hackie sack that works some certain rib or lower traps/lats muscles.
I'll have to look at one of our anatomy charts.
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