Bending knees

Muscle

Chest, Abs

Equipment

Bodyweight

Measured in

Reps

How to do it

Lie on your back with your right leg extended straight and your left knee bent, with your left foot flat on the floor. Engage the muscles in your right thigh to straighten the knee, making sure not to lock it. Slowly lift your right leg until your knees are parallel, and then lower it back down.