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. You Might Also Like South 2011 July 30, 2011 “Fail to prepare, Prepare to fail” Roy Keane September 4, 2013 Thoracic Mobility October 12, 2014
