I have a pretty strong lower body, so I breeze through a few sets of these easily as well as the 12 leg curls on the stability ball. However, I quickly realize I underestimated Jolie's upper-body ...
Return to the starting position and repeat with the other leg. Stability Ball Leg Curls This exercise works the hamstrings intensely, as well as improving stability. To perform it: Lie on your ...
Repeat for 6-10 reps. Perform the same move as the double-leg stability ball hamstring curl, only this time, use just one leg ...