Dr. Laskowski: The seated hamstring curl is an exercise you can do with a weight machine to work the muscles in the back of the thigh. As the name implies, the seated hamstring curl targets the hamstring muscles here in the back of the thigh. Strong hamstring muscles help to protect your ligaments in the knee.

Nicole Campbell: To do a seated hamstring curl with a weight machine, start by sitting on the weight bench with your ankles on top of the bar. Press down the bar with your legs. Raise your legs until your knees are almost straight but not completely back to the starting position. You'll feel tension in the muscles in the back of your legs.

When you're doing a seated hamstring curl, remember to keep your movements smooth and controlled.

For most people, one set of 12 to 15 repetitions is adequate.

Remember, for the best results, keep your movements smooth and controlled.