Position your body in the leg curl machine by lying face down and gripping the handles in front of you. Adjust the leg pad so that it rests on your ankles. Keep your body flat against the machine and curl the weight towards your body. Squeeze your hamstrings at the top of the movement and then lower the weight back to the starting position. Continue the exercise until you have reached muscular failure.
Tip: Use a full range of motion on this exercise by curling the weight as high as possible and allowing for a full stretch at the bottom. In order to keep the tension on your hamstrings at all times, do not rest the weights at the bottom of the movement.