Arching the lower back at the top
Finish with a slight posterior pelvic tilt and ribs down so the glutes, not the spine, complete the lockout.
Isolation · Machine
The glute drive machine is a plate- or stack-loaded hip thrust: you lean back on a pad, a belt or pad sits across your hips, and you drive them up. It loads the glutes heavily without setting up a barbell, and suits anyone wanting a simple, stable hip thrust.
The glutes extend the hip and are most loaded near the top of the movement. The hamstrings assist with hip extension; feet farther out increases their contribution, while feet closer keeps the glutes in focus.
Finish with a slight posterior pelvic tilt and ribs down so the glutes, not the spine, complete the lockout.
Bring your feet in until shins are vertical at the top if you mostly feel your hamstrings.
Pause briefly at the top and control the lowering instead of rebounding off the bottom.
Surpass starts the glute drive machine at 10–15 reps with about 1 reps in reserve. As an isolation exercise it fits well after your main compound lifts.
Work up in an 8-15 rep range, adding plates once you can hold a clean top squeeze on every rep. Heavier loads are fine as long as the lockout stays crisp.
Surpass shows what you lifted last time beside a target for this set, and adjusts it from your reps and RIR. Free on iPhone, no account needed.
These train the same main muscles. Swap when the equipment is busy, something hurts, or progress has stalled for several weeks.
For glute development it does the same job and is faster to set up and more comfortable on the hips. The barbell version is more portable and easier to load very heavily in some gyms.
Hamstrings usually mean your feet are too far out; back means you are arching at the top. Adjust foot position and finish with ribs down.