Calves
 

Calves

Standing Dumbbell Single-Leg Calf Raise

This can be done anywhere there's a step or platform. "It helps enhance ankle mobility, which will boost performance in other lower-body exercises," says Contreras.

Do this: Grab a dumbbell and stand on a step or a 25-pound plate. Cross your left foot behind your right ankle, balancing on the ball of your right foot. Raise your right heel. Do 10 reps, switch sides, and repeat