Squat with Ball

Squat with Ball: You'll need an exercise ball. Place the ball between a wall and the curve of the lower back. Stand with your feet shoulder-width apart. Bend your knees and lower yourself 5 to 10 inches, keeping your shoulders level and your hips square. Hold this position for 3 seconds and then stand back up.

Start with 5 reps and work your way up to 12. Once you've mastered 12 reps, rest for 30 seconds and do another set. This exercise targets your thighs and butt.