The single leg deadlift is humbling in the best way — it exposes exactly how much your stronger side has been carrying, and how little balance you actually have. It's also one of the best tools for fixing both. Here's the honest guide. A single leg deadlift is a hip hinge performed on one leg, training your hamstrings and glutes while heavily challenging balance and exposing the left-right imbalances that two-legged lifts hide. Here's how to do it.
What the single leg deadlift trains (the honest mechanics)
The single leg deadlift is a unilateral hip hinge: standing on one leg, you hinge forward at the hip while your other leg extends behind you as a counterweight, then return to standing. It trains the hamstrings and glutes of the standing leg, plus significant core and balance demand and the often-neglected hip stabilizers. Its unique value is being single-leg — on a regular Romanian deadlift, your stronger side can quietly take more of the load and hide an imbalance for years. Here, each leg has to do its own work. It complements the Bulgarian split squat as unilateral lower-body training.
Proper form (the movement)
Stand on one leg with a soft knee bend, holding a dumbbell or kettlebell (start with just bodyweight). Then: hinge forward at the hip, pushing your hips back while your free leg extends straight behind you, keeping your body in a roughly straight line from head to back heel. Keep your back flat and lower until you feel a strong hamstring stretch (torso roughly parallel to the floor, or as far as your flexibility allows with a flat back). Drive your hips forward to return to standing, squeezing your glute. The cues: hinge don't squat, hips back, free leg extends behind as a counterweight, flat back, straight line head-to-heel, squeeze the glute at the top.
The hip-rotation sin (this is the one)
The signature mistake on single leg deadlifts: letting the hip of your free leg rotate open toward the ceiling. As you hinge, it's natural for your rear leg to twist outward, which opens your hips, rotates your spine, and takes the tension off the hamstring and glute you're supposed to be training. The fix: keep your hips square to the floor throughout — imagine your hip bones pointing straight down, or that you're keeping your rear foot's toes pointed at the ground rather than out to the side. This is the cue that turns a wobbly, twisting mess into a genuinely effective exercise. Square hips and a flat back are the whole technique.
The balance struggle (it's normal, here's the fix)
Honest expectation: you will wobble badly at first, and that's completely normal. Balancing on one leg while hinging is a skill most people have never practiced, and early attempts feel comically unstable. The fixes: start with bodyweight only until the pattern clicks; hold a rack, wall, or pole with one hand for light support while you learn; fix your gaze on a spot on the floor a few feet ahead; and go slowly — rushing guarantees a stumble. You can also try the kickstand version (rear toe lightly touching the ground behind you for stability), which gives most of the unilateral benefit with far less balance demand. The wobble improves noticeably within a few sessions.
Why it fixes imbalances (pair accordingly)
The real payoff: almost everyone has a stronger and weaker side, and bilateral lifts let the strong side compensate indefinitely. Training one leg at a time forces your weaker side to do its own work and catch up, building more balanced strength and reducing the injury risk that comes with asymmetry. The balance and hip-stability benefits also carry over to athletics and everyday movement. Use it as an accessory in a leg day after your heavy bilateral work, alongside hamstring curls and the hip thrust for complete posterior-chain development. Use light-to-moderate weight for moderate reps — this is a control exercise, not a loading one. Progress with progressive overload once your balance is solid.
Quick answers
What does the single leg deadlift work?
The hamstrings and glutes of the standing leg, plus core, balance, and hip stabilizers.
Why do I wobble so much?
Balancing on one leg while hinging is an unpracticed skill — start bodyweight, hold a support, and fix your gaze; it improves in a few sessions.
What's the biggest form mistake?
Letting your free leg's hip rotate open — keep your hips square to the floor throughout.
How heavy should I go?
Light to moderate — master bodyweight balance first; this is a control and stability exercise.
How far should I hinge?
Until you feel a strong hamstring stretch, roughly torso-parallel, keeping a flat back.
Does it fix leg imbalances?
Yes — training each leg alone forces the weaker side to catch up, unlike bilateral lifts.
What if I can't balance at all?
Use the kickstand version with your rear toe lightly touching the ground.
Your stronger leg has been covering for the weaker one on every deadlift you've ever done. Stand on one leg and the arrangement ends immediately.
The single leg deadlift builds hamstrings, glutes, balance, and hip stability while forcing each side to earn its own strength. Keep your hips square, your back flat, and your free leg extended as a counterweight — and expect to wobble at first. Start bodyweight, use a support if needed, and add load only once you own the balance.