Push-up (on stability ball)

Place the stability ball on the ground and position yourself facing down with your hands on the ball, shoulder-width apart. Extend your legs straight out behind you, balancing on your toes. Engage your core and lower your chest towards the ball by bending your elbows, keeping your body in a straight line. Pause for a moment at the bottom, then push yourself back up to the starting position by straightening your arms. Repeat for the desired number of repetitions.