DUMBBELL SQUATS FIRM UP THE GLUTES
Weak glutes, tight calves and the inability to squat can force you to shift your center of gravity toward the ball. To prevent this, grab a five- to 15-pound dumbbell and hold it in front of you with your arms extended. Lower your body into a deep squat (your butt almost touching the floor) and place the dumbbell on a platform. Then stand up, without the weight. Do two sets of 10 reps.