11THIGHS: Leg Press
Sit on a leg press machine with your feet about shoulder-width apart and your knees bent at a 90-degree angle.
Exhale, and take two counts to extend your legs. Inhale, and take two counts to bend them back to the starting position. Repeat for the number of repetitions / sets indicated in your strength-training workout program.
Keep your back straight and up against the seat pad. Only your legs should move in this exercise.