Seated Leg Curl

Anton YefanovUpdated September 6, 2026

The seated leg curl is knee flexion against a machine. You sit with your thighs pinned under a lap pad, the roller resting just above your ankles and your knees lined up with the machine's pivot, then curl your heels down and back toward the seat. Sitting keeps the hips flexed, which holds the hamstrings at a longer working length than the lying version does. Sloppy technique on the lying version drags the lumbar extensors into the work; the seated setup, with the spine against a backrest, largely removes that risk.

How to do the Seated Leg Curl

Set the seat and back pad so your knees line up with the machine's pivot.
Sit back with your thighs flat and the lap pad locked down over them.
Rest your lower legs on top of the roller, contact just above the ankles.
Grip the side handles and press your hips into the seat.
Curl your heels down and back toward the seat as far as the machine allows.
Return slowly until your knees are almost straight, then repeat.

Muscles worked

Primary:: Hamstrings
Secondary:: Glutes

Why train it

Isolates knee flexion so the hamstrings work without the quads or hips joining in.
The seated position holds the hamstrings at a longer working length.
Machine guidance makes it straightforward to load safely for newer lifters.

Common mistakes

Letting the hips lift off the seat, which turns the curl into a partial hip movement.
Locking the knees out on the return, which drops tension off the hamstrings.
Setting the roller on the calf instead of just above the ankle, which shortens the lever.
Snapping the weight back, which wastes the eccentric and rattles the stack.

Frequently asked questions

Is the seated leg curl better than the lying leg curl?

For growth, slightly. Sitting bends your hips, which stretches the hamstrings more during each curl. In a 12 week study, the seated version built noticeably more hamstring muscle than the lying version. The lying leg curl still works well, so use it if that is the machine you have.

How do you set up a seated leg curl machine?

Line your knees up with the machine's pivot point, usually marked with a dot. The lower pad should rest just above your heels, and the thigh pad should press down firmly so your legs cannot lift. Push your back into the seat, and set the start position so your legs are nearly straight.

Why are seated leg curls so hard?

Because your hamstrings start from a stretched position, which makes them work hard right from the first part of each rep. Cramping near the end of the curl is also common. Both are normal. Slow the reps down and use a weight you can control the whole way.

Do seated leg curls work the glutes?

Very little. The curl is a knee movement, and your glutes work at the hip. You may feel your glutes holding you in the seat, but they are not lifting the weight. For glutes, pair leg curls with hip thrusts or Romanian deadlifts.

What muscles does the Seated Leg Curl work?

The Seated Leg Curl trains the hamstrings as the main target. Expect the glutes to take some of the load as well.

What equipment do I need for the Seated Leg Curl?

The Seated Leg Curl needs a machine. Nothing beyond that is required to run the movement the way it is described above.

Is the Seated Leg Curl suitable for beginners?

Yes. The Seated Leg Curl is rated beginner, and the machine holds the path for you, so there is little to get wrong once the seat and the pin are set.

Can I do the Seated Leg Curl at home?

Only if your home setup runs to a machine. Most do not, so this is usually a gym movement. The alternatives below cover the same muscles with kit you are more likely to have.

How many sets and reps of the Seated Leg Curl should I do?

Three to four sets of 10 to 15 reps. Isolation work responds to reps and a controlled tempo rather than load, so stop each set a rep or two short of failure and keep the weight honest.

What are good alternatives to the Seated Leg Curl?

Band Leg Curl, Cable Single Leg Laying Leg Curl, and Dumbbell Leg Curl train the same primary muscles as the Seated Leg Curl. Pick whichever one suits the equipment in front of you.