How to Do a Leg Curl with Good Form
The leg curl trains the muscles along the back of your thighs by bending your knees against resistance. Careful set-up and steady movement help keep the exercise focused where it belongs.
Set up the machine to fit you
On a seated leg curl, line your knees up with the machine’s turning point and place the lower pad just above your heels. Adjust the thigh pad so it holds your legs securely without pressing uncomfortably.
For a lying leg curl, position your knees close to the edge of the bench and rest the pad above your heels. Keep your hips against the bench, hold the handles lightly and choose a resistance you can control throughout the movement.
Curl with control
Begin with your legs extended but avoid forcing your knees into a locked position. Brace your middle, keep your upper body still and bend your knees to draw the pad towards you.
Pause briefly when your knees are comfortably bent, then return the pad slowly until your legs are nearly straight. Let your knee joints guide the movement rather than lifting your hips or swinging the weight.
Avoid the usual form mistakes
Using too much resistance can turn the leg curl into a hurried movement driven by momentum. Reduce the load if you cannot complete each repetition without your hips rising, your back arching or the weight stack slamming down.
Do not shorten the movement simply to move a heavier load. Work through the largest comfortable range you can manage, and stop if the exercise causes sharp or sudden pain rather than normal muscular effort.
Fit leg curls into your training
Leg curls can sit alongside exercises that train your thighs, hips and lower legs. The suitable number of sets, repetitions and weekly sessions depends on your experience, recovery and wider training programme.
Record the machine settings, resistance and repetitions so you can repeat the same set-up next time. Increase the challenge gradually only when your form remains steady from the first repetition to the last.