A good Hollow Body position begins by pulling your knees to your chest and tucking your chin to your knees. Use your arms to pull you into a tight tucked position. Notice that your back will be firmly pressed into the floor. Before you proceed any further, tighten your belly then leg go with your arms and slowly extend your legs out and away. As the legs get farther away you’ll feel your back start to be pulled off the floor. STOP! This is all the further that you’ll continue with a Hollow Body or Hollow Tuck. Under control return to the starting position.
If you’re able to extend the legs all the way out without losing the connection with the back and ground then you’re in a good Hollow Body position.