Nordic hamstring curl: technique, mistakes and progression

How to do the Nordic hamstring curl properly, the mistakes that waste it, easier ways to start, and how many sets a week actually make sense.

If you have tried a Nordic curl and hit the floor about twenty degrees in, your technique was probably fine. That is what a first attempt looks like for most people, and very few can control the full range straight away.

The kit list is almost nothing: someone to pin your ankles, or a loaded barbell to hook them under, and something soft for your knees. That is why it spread through football and handball pitches long before it turned up on gym floors.

What follows is the practical version — what the movement actually loads, how to perform it, where people go wrong, how to shorten it while you build strength, and what to swap it for when there is no equipment.

What the exercise is and which muscles it works

You kneel, your ankles are held down, and from an upright torso you lower yourself forward towards the floor while keeping a straight line from knees to shoulders. The hamstrings do the work by resisting the fall — an eccentric contraction, where the muscle lengthens under load.

The hamstring group has three muscles: biceps femoris, semitendinosus and semimembranosus. All of them bend the knee and extend the hip, but the Nordic curl loads them through the knee rather than the hip. That is what separates it from a Romanian deadlift, which challenges the same group through hip movement instead.

The glutes and spinal erectors join in isometrically, holding the hip extended so the body does not fold at the waist. This is why plenty of people feel their lower back the day after a Nordic session even though nothing back there moved.

Research generally points to eccentric hamstring work reducing hamstring strains in sports that involve sprinting, and the evidence is strongest for exactly that kind of prevention. What changes inside the muscle — strength, fascicle length, or something else — is still unsettled. What the exercise definitely does not do is replace running: if your sport involves sprinting, you still have to sprint in training.

How to perform it

Kneel on a mat or a folded towel, knees about hip-width apart. Add another layer if your kneecaps complain.
Have a partner kneel behind you and press down on your ankles with both hands, just above the heel — not on your calves. Training alone, hook your ankles under a low loaded barbell or the pads of a machine.
Set up with knees, hips and shoulders in one line. Squeeze the glutes and brace the abdominals so your ribs do not flare forward.
Keep your arms by your sides or crossed on the chest, but ready to drop in front of you at any moment.
Begin leaning forward, rotating around the knees only. The hip stays extended — no sitting back, no hinging at the waist.
Lower as slowly as you can manage. Three to five seconds of control before you lose the fight is a good target.
When you can no longer brake, catch yourself on your palms and absorb the landing by bending your elbows.
Push back just hard enough for the hamstrings to pull your torso upright again. Pause a second, then start the next rep.

Common mistakes

Bending at the hips. The most frequent and most costly error. It looks like a deep rep, but the hamstrings have quietly given up: the chest drops, the hips travel back and the load disappears. Film yourself from the side and check the knee–hip–shoulder line stays straight.
Free-falling. If you are on the floor in under a second you have not done a rep, you have fallen over. The value is in the braking, not in touching the ground.
A poor ankle hold. A partner gripping your calves instead of your ankles will not hold, and you will slide forward mid-set.
Doing far too much on day one. Three sets of ten full reps buys you several days of severe soreness and no useful running or squatting. Two sets of four is plenty to begin with.
Bringing the hands down too late. They should start travelling towards the floor before you lose control, not after.
Arching the lower back to make the movement look longer. It adds nothing for the hamstrings and loads the lumbar spine for no reason.

Easier versions

Shortening the range is the simplest fix. Lower only 20 to 30 degrees from upright, hold the control, then pull yourself back up with the hamstrings. Add a little depth as the weeks go by.

A resistance band anchored high behind you and looped across your chest takes some bodyweight off and lets you handle the full range with control. A thicker band means more help, so you can work down to thinner ones over time.

The third option is raised hands: put a bench or box in front of you so your palms reach it roughly halfway down. Lowering the height of that support gives you a very precise way to add depth.

Harder versions

The first genuine step up is a full-range rep with no push from the arms — down to the floor, chest touching, and back up on hamstring strength alone. Hardly anyone manages more than two or three of those.

After that, stretch the lowering out to six or eight seconds before you add any external load. A 5 to 10 kg plate held against the chest is the obvious next step, and putting your hands behind your head also makes things harder by lengthening the lever.

With a slanted bench or board, setting your knees higher than your shoulders raises the demand further. The single-leg version exists, but it needs exceptional strength and is very easy to overdo.

Alternatives if you have no equipment

A partner is the easiest solution, though solo options are fine. A barbell set low in a rack and loaded with 60 kg or more will hold your ankles. So will the bottom rungs of wall bars, a padded sit-up bench, or the roller pads of a leg curl machine.

With none of that, the hamstrings can still be trained properly. Romanian deadlifts and the good morning, provided you keep the technique tidy, load them through the hip, while sliding leg curls on a smooth floor with towels or sliders hit the same knee-bending job.

They are not interchangeable. Hip-based and knee-based work complement each other, so keeping one of each in the week is sensible. If you can only pick one and you sprint in your sport, pick the eccentric knee-based work.

Sets and reps

Start with two sets of 3 to 5 reps, once or twice a week, resting two to three minutes between sets. For the first few weeks stick to a shortened range and stop chasing rep numbers.

After four to six weeks, three sets of 5 to 8 reps is a reasonable target. Twenty to thirty total reps a week is enough for most people; beyond that, soreness and fatigue climb while the benefit barely moves.

Put the exercise at the end of a leg session or in its own short block. Avoid it within 48 hours of a match or a sprint session, because you will be slower than usual. In season, one or two sets of 4 to 6 reps a week maintains what you have built.

Soreness after the first two or three sessions can be heavy. That is expected, but if it leaves you unable to walk down stairs normally, halve the reps next time.

Who it suits and when to avoid it

The clearest beneficiaries are athletes who sprint — footballers, handball players, track athletes — and anyone with a previous hamstring strain who has finished rehab. It also sits well inside a knee injury prevention plan, since strong hamstrings help control the knee during braking and changes of direction.

For gym-goers who never sprint, it remains a cheap way to train knee flexion without a machine. If you are older and returning to training, begin with a short range and a band; the thinking in the piece on what sensible training looks like at 50 applies here too.

Skip it or delay it if you have a fresh hamstring strain, pain at the front of the knee when kneeling, recent knee surgery, or a hamstring tendon that was used as a graft — in that case a physiotherapist should decide when and how it goes back in. If you cannot hold a neutral spine through the whole rep, sort that first; the article on preventing back pain has practical steps.

When to see a doctor

Get medical advice if you feel a sharp stab or a tearing sensation at the back of the thigh followed by bruising and difficulty walking, if your knee swells after training, if numbness or weakness spreads down the leg, or if pain has not settled after seven to ten days of rest.

The short version

The Nordic curl is eccentric hamstring work through the knee; the braking phase is what makes it worth doing.
The knee–hip–shoulder line must stay straight; hinging at the hip cancels the exercise.
Begin with 2 sets of 3–5 shortened reps, once or twice a week.
Twenty to thirty reps a week is a sensible ceiling.
Without a partner, use a loaded barbell in a rack, wall bars or a padded bench.
Do not schedule it right before a speed session or a match.