This movement is taken from yoga and is used to relax tight, tense muscles.
From the quadruped position (on your hands and knees) with your big toes together and your knees slightly apart, move your hips back towards your heels.
When you have pushed your hips as far back as they can go, reach forward as far as you can with your arms.
In this position, drop your head down towards the floor and rest it there.
