a) Lie on your back and bring legs to tabletop position, squeezing a stability ball between your feet. b) Press lower back into the floor, straighten legs to 45-degree angle, return to tabletop.
If youve ever been in a big-box gym before, youve seen plenty of guys doing classic leg exercises like squats and lunges and deadlifts. But theres a good chance youve also seen a host of leg-training ...