You'll need an exercise ball. Start off with 5 reps, and work your way up to 2 sets of 15. Targets your arms, chest, shoulders, and core muscles.
Push-Up on Ball: You'll need an exercise ball. Lie with your abdomen on the ball and walk your hands forward on the floor until the ball rests under your thighs. Pull your navel in towards your spine, bending your elbows, and lower your upper body towards the floor. Hold this position for 3 seconds and then push up. Your elbows are straight, but not locked. Keep your head aligned with your spine and your abs engaged. Start off doing 5 reps, and work your way up to 15. Once you've mastered 15 reps, rest for 1 minute and then do a second set. This exercise targets your arms, chest, shoulders, and core muscles.