Single Leg Romanian Deadlift

Definition

The single leg Romanian deadlift (SLRDL) is a loaded unilateral hip-hinge exercise performed by hinging forward on one leg while holding a dumbbell, kettlebell, or barbell, with the non-working leg extending behind you. It emphasizes the eccentric (lowering) phase to build hamstring and glute strength through a lengthened range of motion. For HYROX^® athletes, the SLRDL is one of the most valuable exercises for developing the single-leg posterior chain strength, balance, and hamstring resilience needed for running and pulling stations.

Technique & Form

1. Stand on your left foot holding a dumbbell or kettlebell in your right hand (contralateral loading). Maintain a slight bend in your standing knee.
2. Hinge at the hip, lowering the weight toward the floor while extending your right leg straight behind you. Your torso and back leg should move as one unit.
3. Lower until you feel a strong stretch in your left hamstring - typically when your torso reaches parallel to the ground. Keep both hips pointing toward the floor.
4. Reverse the movement by squeezing the left glute and driving the hip forward to return to standing. The back leg returns under you.
5. Maintain a neutral spine and braced core throughout. Complete all reps on one side before switching.

Muscles Worked

• Primary: Hamstrings, gluteus maximus (standing leg)
• Secondary: Erector spinae, adductors, gluteus medius
• Stabilizers: Core musculature, ankle stabilizers, forearm flexors (grip)

Common Mistakes

• Rounding the lower back: The spine must stay neutral throughout. If your back rounds, the weight is too heavy or your hamstring flexibility is insufficient.
• Opening the back hip: Letting the hip of the non-working leg rotate outward reduces the single-leg hinge demand. Keep hips square to the floor.
• Bending the standing knee too much: This turns the exercise into a single-leg squat. Maintain a soft knee (15-20 degrees) and hinge from the hip.

Benefits

• Strengthens hamstrings in a lengthened position, reducing strain and tear risk
• Develops single-leg balance and proprioception for running efficiency
• Corrects left-right posterior chain asymmetries
• Builds the hip hinge pattern transferable to sled work and deadlifts

HYROX^® Context

The SLRDL directly transfers to the Sled Pull station through its hip-hinge mechanics and to all running segments through single-leg posterior chain strengthening. Hamstring injuries are among the most common in HYROX^® training - the SLRDL's eccentric emphasis is the best preventive measure. It also builds the balance and hip stability needed for 200 m of Sandbag Lunges. Program 3-4 sets of 8-12 reps per leg with moderate load (12-24 kg) as a primary accessory exercise, 2 times per week.

Variations & Alternatives

• Single Leg Deadlift - bodyweight or lighter version for warm-up activation
• Trap Bar Deadlift - bilateral heavy pulling for maximal posterior chain strength
• Single Leg Glute Bridge - supine glute activation without balance demands

FAQ

Should I hold the weight on the same side or opposite side as my standing leg? Contralateral (opposite side) is standard and adds an anti-rotation demand. Ipsilateral (same side) is also effective and may feel more balanced for beginners. Both are valuable.

How is the SLRDL different from a regular Romanian deadlift? The single-leg version adds balance, proprioception, and unilateral strength demands. It also exposes asymmetries that bilateral RDLs can hide. Use both in your program.

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