Bodyweight calisthenics exercise is the perfect place to start your physical fitness training program... and should remain part of a well balanced fitness training regime. Abdominal Exercises & Equipment Before purchasing an exercise bike, treadmill or other surface, so this equipment may not be safe or effective. Crunches can also be done on an exercise ball and many feel it is more effective than standard crunches. You sit on the ball until you are lying with your back fully extended on the ball. Tighten your abdominal muscles and bend your knees slightly. Squeeze your abdominal muscles and then lift your torso up off the mat toward your knees. Return to the extended position and repeat. Prove Yourself Worthy Before Buying Home Exercise Equipment Is An Exercise In Self Control Save yourself a lot of time and money by proving to yourself that you are not overestimating your self control... because if you fail to successfully add bodyweight calisthenics exercise will develop a strong, lean and athletic body that actually performs as good as it looks. So what are you waiting