Just looking for ideas...
asooneyeonig Well-known member Awards 0 Nov 23, 2012 #2 http://www.t-nation.com/free_online_article/most_recent/21st_century_core_training_1
hvactech Legend Awards 0 Nov 23, 2012 #4 I used to let kimbo slice punch me in the stomach while flexing, 10 punches 4 sets.