Cross Crawling promotes bilateral hip/ shoulder connection. Keep the movements slow and steady. Do not rush through the movement. Slow movement encourages the stability we seek from this exercise. Keep the arm straight as you take it overhead. Only take it as far as it can go without pain or discomfort. If you can't take it to the ground that's ok, just take it as far as you can. This diagonal between opposite hip and shoulder is important to function in a wide range of human movement! This is another one to maintain range of motion and co-ordination.