They all seem about the same to me with minor variations. Has anyone used any of these?
http://obsessionfitness.com/category/eq ... -trainers/
I believe they can work but wonder how much better than old-fashioned crunches.
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Fit_Friend wrote:They all seem about the same to me with minor variations. Has anyone used any of these?
http://obsessionfitness.com/category/eq ... -trainers/
I believe they can work but wonder how much better than old-fashioned crunches.
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