Adopting a standard press up position, place both feet up onto the Swiss ball with your arms fully extended with hands underneath your shoulders, fingers pointing forward. Lock off your core stabilizing muscles by gently drawing up your pelvic floor muscles and drawing your belly button back towards your spinal column. Keeping your body straight bend your elbows and lower your chest to the ground. Extend your arms and return to the starting position and repeat. Focus on keeping your back straight and in a neutral position while locking on your stabilizing muscles.