One leg, all glute, zero hiding spots.
Keep your hips level at the top. Don't let the working side hike up higher than the other.
Planting one foot doubles the demand on the working glute, which has to drive the hips to full extension alone while also keeping the pelvis dead level. The hamstrings assist from the bent-knee position, but the top squeeze belongs entirely to one side, which is why this variation exposes left-right gaps that two-legged thrusts hide. All of that with zero equipment beyond a bench makes it one of the most honest glute moves going.
Massively, and not just because one leg carries the load. The working glute also has to stop your hips twisting and dropping, so expect far fewer reps per side than your two-legged number.
The working glute is running out of strength before the range is done. Slow the rep down, hold the top for a beat, and shorten the range slightly until you can lock the hips level the whole way.
When regular hip thrusts and bridges feel easy for high reps and you want more challenge without adding load. It is also the tool to reach for if one side has quietly become stronger than the other.
