Tight, focused glute squeeze one leg at a time.
Keep your hips square and still. If your back arches, you've gone too far.
The cable kickback isolates one glute at a time, driving the leg back and up against a low pulley that keeps tension on from full stretch to full squeeze. Because the cable resists through the whole arc, the glute is loaded even at the bottom, where bodyweight kickbacks give nothing. The hamstrings assist the leg back, but with square hips and a controlled tempo, the top-of-rep squeeze belongs to the glute you strapped in.
You're probably arching your back to fake extra height. Kick back and slightly up only as far as your hips stay square and still, squeeze for a beat, and the glute will light up at a fraction of the weight.
Light to moderate. The moment your torso twists or your back arches to move the stack, the glute stops being the driver. This is a squeeze-and-control move, not a strength lift.
They're the detail work, not the foundation. Thrusts load both glutes heavy, kickbacks polish each side alone and catch imbalances. Run kickbacks after your big glute lift, not instead of it.
