Knees an inch off the floor, crawl and let your core fight to stay still.
Keep hips low and level so they do not sway as you switch hands and feet.
Hovering your knees an inch off the floor turns a crawl into a moving plank, with the deep core muscles fighting to keep your hips level while opposite hand and foot lift and step together. Every step removes half your base of support, so your trunk has to resist rotation constantly, that fight is the exercise. It earns its place in warm-ups and core circuits as a drill that builds real stability, not just crunch soreness.
Anti-rotation under movement. With knees hovering, each step leaves you balanced on two points, and your core has to stop your hips twisting and swaying while you travel. It trains the trunk to stay stiff while limbs move, which is what a core actually does under a barbell.
Distance matters less than quality. A few metres forward and back with dead-level hips beats crossing the whole gym with your backside swinging. Imagine balancing a cup of water on your lower back and keep it dry.
You are dumping your weight straight into them for longer than they are used to. Spread your fingers, grip the floor, and take shorter sets. Wrist tolerance builds quickly, and small steps keep the load moving instead of parking on one hand.
