Updated: September 2026
The single-leg deadlift is a useful hip-hinge exercise for building lower-body strength, balance and coordination. It primarily challenges the glutes and hamstrings while requiring the trunk and standing leg to control rotation and balance.
You can perform it with bodyweight, one kettlebell, two kettlebells or a barbell. The best variation is the one you can control consistently.
What Muscles Does the Single-Leg Deadlift Work?
The main contributors are:
- gluteus maximus
- hamstrings
- adductors
- calf and foot muscles
- trunk muscles that help control rotation and balance
The exercise is not about “activating fascial lines”. A simpler and more accurate way to understand it is as a unilateral hip hinge that requires coordination between the hip, trunk and standing leg.
Why Use Two Kettlebells?
Holding one kettlebell in each hand creates a symmetrical external load. For some people, that makes the movement easier to control than holding a single weight on one side.
It is not automatically better. A single kettlebell can increase the rotational demand, while two kettlebells may make balance and loading more predictable.
How to Perform a Single-Leg Deadlift
- Start tall: hold the load with your arms relaxed and shift weight onto one leg.
- Keep a soft knee: do not lock the standing leg.
- Push the hips back: hinge rather than squatting down.
- Let the free leg travel behind you: it acts as a counterbalance.
- Keep the pelvis controlled: avoid opening the hip excessively.
- Stop where you can maintain control: range is individual.
- Drive through the standing foot: return to upright using the hip.
How Much Should You Brace Your Core?
Use enough trunk tension to control rotation and keep the movement smooth while still breathing normally.
There is no need to maximally brace every repetition. If you need to hold your breath or become very rigid to maintain balance, the load may be too heavy.
Common Mistakes
Turning the movement into a squat
The hips should move backwards. If the knee travels forward excessively and the torso stays upright, you are changing the exercise pattern.
Opening the pelvis
The free-side hip often rotates upward. Reduce the range or load if you cannot control this comfortably.
Reaching for the floor
The goal is not to touch the kettlebells to the ground. Stop when your hamstrings, balance or trunk control limit the range.
Using too much weight
Heavy loading can turn a useful hinge into a balance challenge you cannot control.
Single-Leg Deadlift Variations
| Variation | Main advantage | Difficulty |
|---|---|---|
| Bodyweight | Learn the pattern | Low |
| Kickstand RDL | More stability | Low–moderate |
| Two-kettlebell SLDL | Symmetrical loading | Moderate |
| One-kettlebell SLDL | More anti-rotation demand | Moderate–high |
| Barbell SLDL | Higher loading potential | High |
How to Progress the Exercise
- Learn a bilateral hip hinge first.
- Practise the single-leg pattern without load.
- Use a kickstand or hand support if balance is limiting the hinge.
- Add light kettlebells.
- Increase load or range gradually.
- Progress only while technique remains repeatable.
For the wider training principle, see Progressive Overload: How to Build Strength Safely.
Is It Good for Balance?
Yes. The exercise challenges single-leg balance and coordination because the base of support is small while the trunk and free leg are moving.
If balance is the only thing limiting you, using a hand support or kickstand can allow you to train the hip hinge more effectively.
Can Single-Leg Deadlifts Prevent Injuries?
No single exercise can guarantee injury prevention. The movement can develop strength, balance and unilateral control, but injury risk also depends on training load, previous injury, recovery, sport demands and many other factors.
What If the Exercise Hurts?
Stop or modify the exercise if you experience sharp, severe or persistent pain. Useful modifications include reducing the load, shortening the range, using support or switching temporarily to a bilateral hinge.
Persistent pain, weakness or neurological symptoms should be assessed rather than trained through.
How Many Sets and Reps?
There is no single prescription for everyone. For technique practice, 2–3 sets of 5–8 controlled repetitions per side can be enough. For strength or hypertrophy, the exercise can also be loaded more heavily once balance and hinge control are reliable. Stop the set when balance or technique deteriorates rather than forcing extra repetitions.
If the single-leg version limits loading too much, use a kickstand RDL or bilateral Romanian deadlift for heavier strength work and keep the single-leg version for unilateral control.
Frequently Asked Questions
What muscles does a single-leg deadlift work?
Mainly the glutes and hamstrings, with the trunk and lower leg contributing to control and balance.
Are two kettlebells better than one?
Not necessarily. Two kettlebells create a more symmetrical load; one kettlebell creates more rotational demand.
How heavy should I go?
Use a weight that allows consistent balance and hip-hinge technique. Load should increase gradually.
Should my back be perfectly flat?
You do not need to force a rigid posture. Aim for a controlled trunk position that feels comfortable and stays consistent through the rep.
Can beginners do single-leg deadlifts?
Yes, but many beginners benefit from bodyweight practice, a kickstand or hand support first.
Strength & Movement Training in Slough
For individualised hinge, balance and strength training, see our M.O.V.E. programme. For recovery-related muscular tension, our Sports Massage service may be useful.
For suitable appointments, you can book through ClinicSense.