Recommendations: 1-3 Sets, 30-60 Dur
Position yourself face down with your toes on a fitness ball and your hands on the floor in a push up position. Your legs should be straight behind you. Your back should be straight and you should look forward not down. This is the starting position. Contract your abdominal muscles tightly. Hold this position as long as you can. Keep looking forward and your back straight. Do one repetition of this exercise but try to extend the time you can hold the position each time you do it.