Think your core is strong? Research shows that holding a side plank for this long puts you in the top 10% of strength. Find ...
Begin by lying stretched out on your side on an exercise mat (I recommend using one of decent thickness, as this can be tough ...
Men's Health Fitness Director Ebenezer Samuel, C.S.C.S. and Women's Health Editor-in-Chief Liz Plosser demonstrate three side ...