Medicine Ball Mountain Climber

Instructions

1. Place a medicine ball on the floor and get into a push-up plank position with both hands on the ball.
2. Drive one knee toward your chest while keeping the other leg extended, balancing on the unstable ball surface.
3. Quickly switch legs in a running motion, alternating knees driving toward the chest.
4. Keep your hips low and level, core braced, and arms straight throughout.
5. Continue alternating at a controlled pace for the prescribed reps.