why not to do sit ups and crunches – Cannon Performance

why not to do sit ups and crunches

Post author:Cannon Performance
Post published:March 2, 2010
Post category:General News

http://www2.macleans.ca/2010/01/19/the-man-who-wants-to-kill-crunches/

as i have been saying to folk for some time now.

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