Crawl with just your legs and feel the glutes fire.
Keep your abs and lower back engaged so your hips stay stable as the legs move.
Crawling with only your legs while your upper body stays quiet makes your glutes drive each hip as the knee sweeps forward and out, with the hamstrings assisting the leg action. The real work is in keeping your hips level and your trunk still while the legs move independently. It shows up in warm-ups and ground-based conditioning as a hip drill that builds control most gym lifts skip.
Hip control. Each leg has to move through a big arc while your pelvis stays stable, which wakes up the glutes and teaches your hips to work independently. Think of it as prep for lunges, sprinting, and anything single leg.
Your hips are sagging or rocking as the legs move. Brace your core harder, slow the leg action down, and shrink the range until your pelvis stays quiet. The drill only counts when the movement comes from the hips, not the spine.
Treat it like a quality drill, not a burner. A couple of sets of 6 to 10 sweeps per leg in a warm-up is plenty. Once it gets sloppy, stop, sloppy crawling trains nothing.
