Slide show: Weight training exercises
Photo of woman doing hamstring curl with weight machine
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The lying hamstring curl is an exercise you can do with a weight machine to strengthen the hamstring muscles in the back of your thighs.

Lie facedown on the weight bench. Position the pad just above your ankles. Slowly bend your knees, pulling your feet toward your buttocks. Only go as far as you can without feeling your pelvis or spine move. You'll feel tension in the back of your thighs. Then slowly return to the starting position. Repeat.

When you're doing lying hamstring curls, use the handgrip for support only. Let your leg muscles do most of the work. Don't pull with your arms or arch your neck or lower back.

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