The Big 3 pieces of fitness equipment are tools that will assist you when doing the 3 compound movements that will work all the large muscle groups of the body. First is a squatting movement. No exercise works the legs better, and the leg muscles are among the largest muscles in the body. Squats are also highly functional because you squat many times every day. Exercise ball squats are an excellent exercise that just about anyone can do. That's why the first of the Big 3 pieces of exercise equipment is an exercise ball. The second movement is a pulling movement. The best upper body exercise is the pull-up. Anyone can do pull-ups with a doorway pull-up bar. Just place a sturdy chair or stool under your feet and use your legs to assist you with the pull-up. The last movement is a pushing movement. Doing push-ups is a great way to work your pushing muscles although they can be hard on your wrists and shoulders. Using Perfect Push-ups takes a tremendous amount of pressure off of your wrists and shoulders, and adds variety to your push-up regimen.