Exercises› Legs› Seated Leg Curl

Seated Leg Curl: Correct Form & Muscles Worked

Hamstrings primary Seated Leg Curl Machine Beginner Isolation · Pull

The seated leg curl performs knee flexion from a seated position, placing the hamstrings in a stretched position at the hip (because you're sitting with hips flexed). This provides a superior stretch stimulus compared to lying leg curls, making it arguably the better curl variation.

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Seated Leg Curl Video Tutorial

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Video tutorial coming soon

How to Do the Seated Leg Curl

  1. Sit in the machine. Adjust the back pad and shin pad so the pad rests on your lower calves and your knees align with the machine pivot.
  2. Legs extended in front of you. Grab the side handles. The hamstrings should feel slightly stretched in this starting position.
  3. Curl your heels underneath you by flexing the knees. Squeeze the hamstrings at full contraction.
  4. Hold the bottom position for a beat.
  5. Extend the legs under control back to the starting position. Feel the hamstring stretch at the top.

Seated Leg Curl Mistakes to Avoid

Machine misaligned — the pivot must match your knee joint. Wrong alignment stresses the knee.
Not using full range — the stretch at the top (legs extended) is where the seated version excels. Don't cut it short.
Slamming the weight stack on return — lower under control. The stretch at the top is valuable, don't rush through it.
Leaning forward — keep your back against the pad. Leaning reduces the hip-flexed stretch advantage.

Seated Leg Curl Muscles Worked

The seated leg curl isolates the hamstrings through knee flexion with the added benefit of the hip-flexed position stretching the hamstrings. Recent research suggests the seated position provides a superior hypertrophy stimulus compared to lying due to the greater stretch.

Seated Leg Curl Alternatives

Leg CurlWant the lying version — different stretch profile, same muscle
Nordic CurlWant the most intense bodyweight hamstring exercise
Romanian DeadliftWant hip-hinge hamstring work with a barbell
Glute Ham RaiseWant combined knee flexion and hip extension
↑ Harder variation
Nordic Curl
↓ Easier variation
Leg Curl

Seated Leg Curl Programming

Strength
3 × 6-8
sets × reps
Rest 90 sec
Hypertrophy
3 × 8-12
sets × reps
Rest 60 sec
Endurance
3 × 12-15
sets × reps
Rest 45 sec

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Seated Leg Curl FAQ

Seated or lying leg curl?
Recent research favors seated — the hip-flexed position provides a greater hamstring stretch, which drives more hypertrophy. However, both are effective. If you only have one, use it. If you have both, prioritize seated.
Why does seated feel harder?
The seated position stretches the hamstrings at the hip while they're curling at the knee — a 'double stretch' effect. This makes each rep more demanding per unit of weight.
Can I do one leg at a time?
Most seated leg curl machines allow single-leg work. This is great for fixing imbalances. Do your weak leg first, match reps on the strong leg.
Seated leg curl vs Nordic curl?
Seated leg curl is machine-guided isolation — easy to control load. Nordic curl is bodyweight and brutally eccentric. Seated for standard hypertrophy training, Nordics for advanced eccentric work and injury prevention.

Related Legs Exercises

Leg Curl
Hamstrings · Machine · Beginner
Nordic Curl
Hamstrings · Bodyweight · Advanced
Romanian Deadlift
Hamstrings · Barbell · Beginner
Glute Ham Raise
Hamstrings · Machine · Intermediate
Single-Leg RDL
Hamstrings · Dumbbell · Intermediate
Stiff-Leg Deadlift
Hamstrings · Barbell · Intermediate
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