Photo: Adam Bell

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Squat to Triple Extension

What it does: Works your quads, glutes and calves, the muscles that help you slow down. "Being unable to decelerate is one of the top causes of injury as we age," says Skull.

How to do it: Stand with your feet hip width apart and toes pointing forward. Lower down 1/3 or 1/4 of the way into a squat, then drive up out of the squat and up onto your toes, like you're doing a calf raise. Instead of holding at the top, immediately drop back down into your squat, hold it for a few seconds, then repeat, for 8 to 10 reps total.