Sculpt Sexy Arms

Grab a pair of 5- to 15-pound dumbbells (you will know the resistance is correct if you can barely eek out 15 repetitions).

Lie on a stability ball (positioning it underneath your head and shoulder blades) with your feet flat on the floor, knees bent about 90 degrees, and abs pulled tight. Hold the dumbbells by your chest, palms facing forward, and press them straight up toward the ceiling. Lower the weights and repeat, using your abs to keep your body still.