Lunges are the number one exercise for scupting great legs and glutes. Combined with the proper core training moves, they add lean muscle and prevent bulking up; something that worries most women. Do 20 repetitions of each exercise in circuit form, then repeat the circuit two to three times. Single Leg Hip Extension: 1. Lie on your back on the floor with your knees bent and feet flat on the floor or on a balance disc. 2. Raise one foot into the air and press your other foot into the floor or disc until your hips come up off the floor. 3. Press until your hips are at full extension. 4. Return to the starting position and repeat for the prescribed repetitions. Repeat with the other leg.