The single leg hip thrust primarily works your glutes, with significant demand on your hamstrings, spinal stabilizers, and the smaller hip muscles responsible for pelvic balance. Performing the movement on one leg increases the stability challenge compared to the standard bilateral version, recruiting more muscle fibers across your hip and core to keep your pelvis level throughout each rep.
Primary Muscles: The Glutes
The gluteus maximus is the main driver of the single leg hip thrust. It powers hip extension, the motion of driving your hips upward against gravity. Electromyography research on single leg bridge variations shows the gluteus maximus activates at roughly 47 to 51% of its maximum voluntary contraction during the movement, depending on knee angle.
The gluteus medius actually fires at a comparable or even slightly higher level, around 57% of its maximum capacity. This is notable because the gluteus medius is the muscle on the outer side of your hip that keeps your pelvis from dropping when you stand on one foot. In a bilateral hip thrust, your other leg helps stabilize the pelvis. Remove that support and the gluteus medius has to work considerably harder to prevent your hips from tilting sideways. The gluteus minimus, a smaller muscle beneath the medius, assists with this same stabilizing role.
Secondary Muscles: Hamstrings and Back
Your hamstrings contribute to hip extension alongside the glutes. How much they contribute depends on your knee angle. At a standard 90-degree bend, hamstring activation can reach about 75% of maximum. Extending the knee further out (closer to 135 degrees) drops hamstring involvement dramatically, down to around 23%, while glute activation stays nearly the same. So if your goal is to isolate the glutes more, positioning your foot slightly farther from your body can shift the work away from the hamstrings.
The spinal erectors, particularly the muscles running along your lower and mid back (the longissimus and multifidus), work as stabilizers throughout the lift. They keep your spine in a safe, neutral position while your hips produce force. Your abdominal muscles also engage to brace the trunk and prevent your lower back from arching excessively. This stabilizing demand is greater in the single leg version because the asymmetric loading constantly tries to rotate your torso.
Why Single Leg Matters for Balance and Symmetry
Most people have a dominant leg that takes over during bilateral movements like squats and standard hip thrusts. You may not notice it, but one glute can quietly do more work than the other for months or years. The single leg hip thrust forces each side to handle the full load independently, which exposes and corrects these imbalances before they become significant.
Training one side at a time also reinforces proper technique. You can feel whether one hip drops, whether one glute fires less readily, or whether your form breaks down earlier on a particular side. This feedback is valuable for anyone recovering from injury or building a foundation for heavier bilateral lifts.
Proper Setup for Maximum Glute Work
Position your upper back against a bench so the edge sits just below your shoulder blades. Your elbows should rest comfortably on top of the bench. At the top of the movement, your working leg’s shin should be vertical with the knee at about 90 degrees. If your foot is too close to your body, your quads take over. Too far out, and your hamstrings dominate (though this can be intentional, as noted above).
The non-working leg can be held in the air with the knee bent, or extended straight out in front of you. Either position works, though holding the knee bent tends to be easier to balance. Keep your chin slightly tucked and your ribs pulled down throughout the rep. This prevents the most common mistake: arching your lower back at the top. When the lower back hyperextends, the glutes disengage and the stress shifts to the lumbar spine, turning the exercise into a back-dominant movement that misses the point entirely. A light brace through your abs keeps everything in line.
Another common error is letting the hips tilt toward the non-working side. If you notice one hip dropping, reduce the range of motion or switch to a B-stance variation until your stabilizers catch up.
Sets, Reps, and Loading
For glute growth, 3 to 6 sets of 8 to 12 repetitions per leg is a well-supported range. A study comparing hip thrusts to back squats for glute hypertrophy used this exact protocol and found that hip thrusts produced comparable gluteal growth while also transferring strength to the deadlift. Start with bodyweight to master the balance component, then progress by holding a dumbbell on the working hip or wearing a resistance band above the knees.
Because single leg work is inherently harder to stabilize, you’ll use less total weight than you would on a bilateral hip thrust. That’s fine. The stability demand and isolated loading more than compensate for the lighter absolute load.
Progressions When Bodyweight Gets Easy
The B-stance hip thrust is an excellent bridge between bilateral and full single leg work. Both feet stay on the ground, but the back foot acts only as a kickstand while the front leg does the majority of the work. This lets you load heavier without balance becoming the limiting factor, and it’s easier to keep the pelvis square.
Once you’re comfortable with the standard single leg version, several techniques can increase difficulty without changing equipment:
- Paused reps: Hold the top position for 1 to 2 seconds to eliminate any bouncing and force the glutes to sustain contraction.
- 1.5 reps: Thrust up fully, lower halfway, thrust up again, then lower all the way. That counts as one rep and significantly increases time under tension.
- Banded hip thrusts: Adding a resistance band creates more resistance at lockout, where the movement normally gets easier. This addresses a known biomechanical characteristic of hip thrusts: the hip extension demand actually decreases as you approach full extension, so bands keep the top portion challenging.
- Slow eccentrics: Taking 3 to 4 seconds on the lowering phase builds control and increases the total work per set.
Who Benefits Most
Runners, single leg sport athletes, and anyone returning from a lower body injury will get the most out of this exercise. Running is fundamentally a single leg activity, so training hip extension and pelvic stability one leg at a time has direct carryover. People with knee pain often tolerate hip thrusts well because the movement loads the hip extensors without placing significant stress on the knee joint, unlike lunges or step-ups where the knee travels forward under load.
For general strength training, the single leg hip thrust works best as an accessory movement after your main compound lifts. It fills the gap that squats and deadlifts leave: targeted, high-repetition glute work with a built-in balance challenge that strengthens the smaller stabilizers bilateral movements tend to miss.