Hamstrings · Isolation movement
Leg Curl
A isolation exercise that targets the hamstrings. Performed with leg curl machine.
Primary muscle
Hamstrings
Secondary muscles
—
Equipment
Machine
Difficulty
Beginner
How to perform the Leg Curl
- Adjust the machine so the knee aligns with the pivot point and the pad sits just above the heel (lying) or behind the lower calf (seated).
- Brace the hips against the pad so the pelvis does not lift off during the contraction.
- Curl the heels toward the glutes by flexing at the knee, squeezing the hamstrings hard at the top.
- Pause briefly in the contracted position without lifting the hips off the bench (lying) or the knees off the pad (seated).
- Lower under control on a slow eccentric to a near-full extension; do not let the stack drop into the stops.
Suggested working range: 10–15 reps. Default progression: double progression.
Common mistakes
- •Lifting the hips off the pad (on lying curls) or the knees off the pad (on seated curls) to chase a deeper contraction.
- •Cranking the heels into the glutes with momentum rather than a controlled hamstring contraction.
- •Failing to brace the hips so the pelvis tilts forward and the lift becomes a glute-driven hip extension.
- •Letting the stack drop into the stops at the bottom of every rep.
Variations & alternatives
Swap in a related movement if equipment, recovery, or progression demands it.
Use this exercise in a program
The Leg Curl fits naturally into hypertrophy and strength splits that prioritize hamstrings volume.
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