Start in a kneeling position with your hands under your shoulders and knees under your hips.
Place a resistance band around one shoulder, ensuring that is it secured to the wall behind you.
Tuck your toes under, and lift your knees off the floor.
Crawl forwards ensuring you keep your knees off the floor.
Continue moving forwards as far as you can against resistance.
Reverse the direction and crawl backwards with control.
Try to keep your back straight throughout this movement.