C COD addict Guest Jun 17, 2009 #1 What are the primary muscles being used when thrusting? (abs, glutes, lower back, etc.)
P Pyori K Guest Jun 17, 2009 #2 This is not a way to exercise / no substitute for hitting the gym either.
M Moska New member Jun 17, 2009 #3 chest (pecs),triceps, abs, and lower back, glutes, you said the answer your self, lol.
