This squat engages your entire body, with extra emphasis on your core, legs and glutes—the primary movers for running.
How to do it: Stand with your feet slightly wider than hip-width apart and hold the Swiss ball overhead with your arms extended. Push your hips back, bend your knees, and lower into a deep squat, bringing the ball slightly in front of your head (keeping arms extended) as you lower. Press through your entire foot to return to standing.
