For hamstring injury prevention, most lifters need surprisingly little: 2 to 3 sets of 4 to 6 Nordic hamstring curls, performed 1 to 2 times per week. Research suggests that even a low-volume dose of about 2 sets of 4 reps twice weekly can build eccentric hamstring strength and favorable muscle architecture. If you're starting from zero, begin with assisted or partial-range reps once a week and progress by controlling the descent through a longer range, not by adding more reps.
The Nordic hamstring curl is one of the few exercises with injury-prevention evidence strong enough to show up in team sports protocols worldwide. It is also one of the most misprogrammed. Lifters either avoid it after one brutal session or do far more volume than the research supports. This guide covers the dose, the reasoning behind it, and a step-by-step progression for complete beginners.
What Is the Nordic Hamstring Curl?
The Nordic hamstring curl, also called the Nordic hamstring exercise, Russian leg curl, or natural glute-ham raise, is a kneeling bodyweight movement. Your ankles are anchored, your body stays straight from knees to head, and you lower your torso toward the floor as slowly as possible using only your hamstrings.
The key word is eccentric. Your hamstrings are lengthening while they resist load, which mirrors what happens during the late swing phase of sprinting. That is the moment when many hamstring strains occur, as the muscle works to decelerate the lower leg while stretched.
Most people cannot pull themselves back up at first. That's expected. The lowering phase is the part that matters most for injury prevention.
What Does the Research Say About Nordic Hamstring Injury Prevention?
The evidence base here is unusually solid for a single exercise:
- Petersen and colleagues (2011, American Journal of Sports Medicine) ran a randomized controlled trial in Danish soccer players and found a substantial reduction in new and recurrent hamstring injuries in the group performing a 10-week Nordic program.
- Van der Horst and colleagues (2015, American Journal of Sports Medicine) found a similar protective effect in amateur soccer players.
- A meta-analysis by van Dyk, Behan, and Whiteley (2019, British Journal of Sports Medicine), pooling data from roughly 8,500 athletes, found that injury prevention programs including the Nordic exercise reduced hamstring injury rates by up to 51 percent.
Two caveats are worth stating clearly. First, most of this research comes from field-sport athletes who sprint regularly, so the benefit for a lifter who never runs fast is less directly established. Second, the exercise reduces risk; it does not eliminate it. Sprint exposure, fatigue, and prior injury history all play a role.
How Many Nordic Curls Per Week Do You Actually Need?
This is where the distinctive finding lies: the minimum effective dose is low.
Presland and colleagues (2018, Scandinavian Journal of Medicine and Science in Sports) compared a low-volume Nordic program with a higher-volume one. Both groups improved eccentric strength and increased biceps femoris fascicle length, with the low-volume group seeing comparable adaptations. The low-volume protocol is often summarized as roughly 2 sets of 4 reps, twice per week, once participants were past the initial build-up.
In practice, that translates to a weekly target of about 8 to 24 quality reps, depending on your phase:
| Phase | Frequency | Sets x Reps | Weekly Reps |
|---|---|---|---|
| Introduction (weeks 1-2) | 1x per week | 2 x 3-5 | 6-10 |
| Build (weeks 3-6) | 1-2x per week | 2-3 x 4-6 | 8-36 |
| Maintenance (ongoing) | 1-2x per week | 2 x 4-6 | 8-12 |
The FIFA 11+ warm-up program takes a similar approach, starting with 3 to 5 reps and progressing gradually as athletes adapt.
Why not more? Nordic curls produce significant muscle soreness when introduced aggressively. Extra volume beyond the effective dose mostly adds fatigue, which can interfere with your squats, deadlifts, and other lower-body sessions. The goal is a small, consistent signal sustained over months.
The Real Progression Metric: Your Break Point
Most people track Nordic curls by counting reps. That misses the variable that actually changes.
Every Nordic rep has a break point, the angle where you can no longer control the descent and drop into the catch. Early on, that might happen 20 degrees from vertical. Months later, you may control the descent nearly all the way to the floor.
This makes break point the more useful number to track. A simple way to log it:
- Film one rep from the side every two weeks.
- Note roughly where control breaks: early (upper third), mid (middle third), or late (lower third).
- Record the descent time in seconds for your best rep.
If your reps stay the same but your descent gets longer and your break point moves lower, you're progressing.
Nordic Curl Progression for Beginners: From Zero to Full Reps
Work through these stages in order. Move on when you can perform the prescribed sets with a controlled 3 to 5 second descent and no sharp pain.
Stage 1: Band-Assisted Nordics
Attach a heavy resistance band to a high anchor behind you and loop it across your chest. The band takes load at the top of the movement. Perform 2 sets of 4 to 5 reps, once per week. Progress by switching to lighter bands.
Stage 2: Partial-Range Eccentrics
Place a box, bench, or stack of mats in front of you. Lower until your hands touch it, then push back up. Gradually lower the target height over several weeks. This gives you a measurable range progression.
Stage 3: Full Eccentric With Push-Up Catch
Lower as slowly as possible through the full range, catch yourself in a push-up position, and use your arms to push back to the start. This is the standard version used in most research protocols. Aim for 2 to 3 sets of 4 to 6 reps.
Stage 4: Reduced Push-Off
Use less arm assistance on the return so your hamstrings contribute to the concentric phase. Few lifters reach full unassisted concentric reps, and you don't need to for injury prevention benefits.
Stage 5: Loaded or Slower Eccentrics
Once full-range control is solid, hold a light plate at your chest or extend the descent to 6 to 8 seconds. Add load conservatively.
How This Fits Into Your Training Log
Because Nordic progress lives in descent time and band level rather than load, log it in the set notes. You can then ask the Kenso AI coach whether your Nordic descent is improving, since it reviews your logged history.
How to Do a Nordic Curl Without Equipment
You don't need a dedicated Nordic bench. Common home setups include:
- Couch anchor: Kneel facing away from a sturdy couch and hook your heels under the base or frame.
- Partner hold: A training partner kneels behind you and presses firmly on your lower calves, not just your ankles.
- Heavy furniture: A loaded bed frame or heavy dresser works if it won't tip or slide.
- Doorway strap: Some door anchors designed for suspension trainers can hold your ankles, though check stability carefully.
Whatever you use, pad your knees with a folded mat or towel. Testing the anchor with a few slow partial reps before your working sets is a sensible precaution.
Where Nordic Curls Fit in a Lifting Program
Nordic curls are fatiguing, so placement matters:
- Put them after your main lower-body lifts, or on an upper-body day, so they don't compromise heavy hinge or squat work.
- Avoid scheduling them the day before sprinting or heavy deadlifts until you know how your hamstrings recover.
- Keep them in your program year-round. Research suggests protective adaptations such as fascicle length can diminish after training stops, so maintenance work matters.
The Nordic curl primarily trains the hamstrings at the knee. For balanced development, pair it with a hip-dominant movement such as Romanian deadlifts or 45-degree back extensions.
Common Mistakes to Avoid
- Doing too much too soon: The first session should feel almost too easy. Soreness from an aggressive start can last several days.
- Breaking at the hips: If your hips bend, your hamstrings are offloaded. Keep a straight line from knee to shoulder.
- Chasing reps over control: Five fast, sloppy reps are less useful than three slow, controlled ones.
- Stopping after a few weeks: The benefit comes from consistency over months, not a short block.
Frequently Asked Questions
How many Nordic curls should a beginner do per week?
Start with 2 sets of 3 to 5 assisted or partial-range reps, once per week, for the first two weeks. If soreness is manageable, progress to 2 to 3 sets of 4 to 6 reps, one to two times per week.
Do Nordic curls really prevent hamstring injuries?
Research, including a 2019 meta-analysis of roughly 8,500 athletes, found that programs including the Nordic exercise reduced hamstring injury rates by up to 51 percent. Most studied populations were field-sport athletes, so the effect for non-sprinting lifters is less established.
Can I do Nordic curls without equipment?
Yes. Anchor your heels under a sturdy couch or heavy furniture, or have a partner hold your lower calves. Use padding under your knees and confirm the anchor is stable before working sets.
How long does it take to do a full Nordic curl?
It varies widely. Many lifters need several months of consistent training to control the descent through the full range, and few ever perform a full unassisted concentric rep. Both are fine, since the lowering phase drives most of the benefit.
Should I stop doing Nordic curls once I'm strong enough?
No. Research suggests the architectural adaptations can fade after training stops. A maintenance dose of around 2 sets of 4 to 6 reps, one to two times per week, is a reasonable long-term target.
The Bottom Line
The Nordic hamstring curl offers a strong return on a small investment. A handful of controlled reps, once or twice a week, sustained over months, is what the evidence supports. Start assisted, progress by range and descent time rather than volume, and treat it as a permanent part of your program rather than a short-term fix.
The lifters who benefit most are the ones who show up consistently and track the right variable. Kenso helps you log every session, record the details that matter for movements like this, and get context from an AI Coach that knows your training history. Download Kenso on iOS and train with intention.