Finish on one leg. Don't put your back leg on the box. Instead, stand tall on the one leg that drove you to the top of the ...

There are many ways to do a plank, from straight-arm, side, and one-legged planks to plank knee taps and jacks. These moves ...

Face a sturdy box, aerobic step, or weight bench. Stand with feet about hip-width apart. Send hips down and back into a squat ...