This exercise is a double whammy: It strengthens and tones the entire core while engaging the gluteus medius (the side of your rear). It also slims the waist, creating an hourglass shape.
How to do it: Lie on your left side with your knees straight, feet stacked. Prop your upper body up on your left elbow and forearm. Brace your core and raise your hips until your body forms a straight line from your ankles to your shoulders. Keeping your hips high, raise your top leg as high as you can, toe pointed forward (try to point it down to the ground). Keep leg straight and upper body completely still. Lower your top leg and repeat. Do 10 reps on each side.
