Nordic Hamstring Curl

Definition

The Nordic hamstring curl is a bodyweight eccentric hamstring exercise where you kneel on a pad, anchor your ankles, and slowly lower your torso toward the ground while resisting with your hamstrings. It is the gold standard for hamstring injury prevention and builds the eccentric hamstring strength that protects HYROX^® athletes during high-volume running and lunge work.

Technique & Form

1. Setup: Kneel on a pad with your ankles secured under a barbell, bench, or partner's hands. Your body should form a straight line from knees to head. Cross your arms over your chest.
2. Descent: Slowly lower your torso forward by extending at the knees. Your hamstrings resist the fall eccentrically. Keep your hips extended - do not bend at the waist.
3. Control: Lower as slowly as possible for 3-5 seconds. Most athletes can only control the top 30-50% of the range initially.
4. Catch: When you can no longer resist, catch yourself with your hands and push yourself back to the starting position. Use your hands to assist the concentric portion until you build enough strength.

Muscles Worked

• Primary movers: Hamstrings (biceps femoris, semitendinosus, semimembranosus) - emphasis on eccentric contraction
• Secondary muscles: Gastrocnemius, glutes (isometric hip extension)
• Stabilizers: Core (anti-extension), hip flexors (maintaining knee position)

Common Mistakes

1. Bending at the hips: Hinging forward at the waist instead of lowering with a straight body. Fix: squeeze your glutes throughout and think "fall like a plank" - your body should pivot at the knees only.
2. Dropping too quickly: Falling to the ground without resistance misses the eccentric stimulus. Fix: aim for a 3-5 second lowering phase. If you fall faster, reduce the range by placing a bench or box in front to limit how far you lower.
3. Skipping this exercise because it is too hard: Most athletes start with minimal range. Fix: even a 20-degree controlled lowering builds eccentric strength. Progress gradually over 6-8 weeks.

Benefits

• Reduces hamstring injury risk by up to 51% according to research - the most evidence-backed injury prevention exercise for the posterior chain
• Builds eccentric hamstring strength at long muscle lengths, which is the exact contraction type that causes hamstring strains during sprinting
• Strengthens the hamstrings without external load, making it accessible anywhere with an anchor point
• Develops the hamstring endurance that sustains running mechanics through 8km of HYROX^® running

HYROX^® Context

The Nordic hamstring curl protects you from the hamstring strains that sideline HYROX^® athletes during race preparation. Running 8km interspersed with stations that fatigue the entire lower body creates the exact conditions for hamstring injury - eccentric overload during the late swing phase of running when muscles are already tired.

Nordics also build the hamstring strength that supports Sled Pull performance (pulling posture), Sandbag Lunges (deceleration during each step), and overall running economy. Program Nordics 2-3 times per week: start with 3x3-5 reps and progress to 3x8-10 over 8 weeks. Pair with leg curls for a complete hamstring development protocol.

Variations & Alternatives

• Leg Curl Machine: Machine-based hamstring isolation for building volume without the extreme eccentric demand of Nordics.
• Romanian Deadlift: Hip hinge that targets the hamstrings at long muscle lengths with controlled loading.
• Slider Leg Curl: Supine hamstring curl using sliders or a towel. Lower demand than Nordics, useful as a progression step.

FAQ

How do I progress the Nordic hamstring curl if I cannot do a full rep?

Start with controlled negatives - lower yourself as slowly as possible through whatever range you can control, then use your hands to push back up. Place a bench or raised surface in front of you to reduce the range of motion. Progress by lowering further each week. Most athletes achieve a full eccentric rep in 4-6 weeks of consistent training.

How often should HYROX^® athletes do Nordic hamstring curls?

Two to three sessions per week, with at least 48 hours between sessions. Start with 3 sets of 3-5 reps and add 1 rep per week. The eccentric demand causes significant delayed-onset muscle soreness initially, so begin with low volume and progress gradually.

ROXBASE includes injury prevention exercises like Nordics in your training plan automatically. Our engine balances performance work with durability training so you arrive at race day healthy. Start your free plan and train to last.