Single Leg Deadlift

Definition

The single leg deadlift is a unilateral hip-hinge exercise where you balance on one foot while hinging forward at the hips, lowering your torso toward the ground as the non-working leg extends behind you. This movement builds posterior chain strength, balance, and proprioception simultaneously. For HYROX^® athletes, it develops the single-leg stability and hamstring resilience needed for running economy and sled pulling mechanics.

Technique & Form

1. Stand on your left foot with a slight bend in the knee. Hold a dumbbell or kettlebell in your right hand (opposite to the standing leg) for counterbalance.
2. Hinge forward at the hips, sending your right leg straight back behind you while lowering your torso toward the floor. Your body should form a T-shape.
3. Lower until your torso is roughly parallel to the ground or you feel a strong stretch in the standing leg hamstring. Keep your hips square - do not let the back hip rotate open.
4. Drive through the standing heel and squeeze the glute to return to standing. The back leg returns to the starting position.
5. Complete all reps on one side before switching. Maintain a neutral spine and engaged core throughout.

Muscles Worked

• Primary: Hamstrings, glutes (standing leg)
• Secondary: Erector spinae, adductors
• Stabilizers: Gluteus medius, ankle stabilizers, core musculature

Common Mistakes

• Hip rotation: Allowing the back hip to open outward reduces the hinging benefit. Actively point both hips toward the floor throughout.
• Rounding the spine: The back should remain neutral from hinge initiation to completion. Think "proud chest" and hinge from the hips, not the lower back.
• Bending the standing knee too much: Excessive knee bend turns this into a single-leg squat. Maintain a soft knee (10-15 degrees of bend) and hinge from the hip.

Benefits

• Builds unilateral posterior chain strength to correct left-right imbalances
• Develops proprioception and ankle stability critical for running on uneven surfaces
• Strengthens hamstrings in a lengthened position, reducing injury risk
• Improves hip hinge mechanics transferable to all deadlift variations

HYROX^® Context

Every running stride in a HYROX^® race is a single-leg stance followed by single-leg propulsion. The single leg deadlift builds the exact muscles and balance demands of this pattern under load. It transfers directly to the Sled Pull station (hip hinge mechanics) and improves running economy by strengthening the glutes and hamstrings that decelerate and propel each stride. Program 3 sets of 8-12 reps per leg as accessory work, 2-3 times per week.

Variations & Alternatives

• Single Leg Romanian Deadlift - loaded version with dumbbells or barbell for heavier posterior chain training
• Single Leg Glute Bridge - supine hip extension for glute activation without balance demands
• Single Leg Hop - explosive single-leg power for running propulsion

FAQ

What is the difference between a single leg deadlift and single leg Romanian deadlift? They are very similar. The single leg deadlift typically starts from standing and can be performed with bodyweight, while the single leg Romanian deadlift usually implies a loaded barbell or dumbbell version with a specific emphasis on the eccentric lowering phase.

How do I improve my balance on single leg deadlifts? Start without weight and touch a wall or rack for support. Focus on a fixed point on the floor 2 m ahead. As balance improves over 2-3 weeks, add light weight and remove the support.

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