This simple stretch is commonly used in yoga and helps stretch the muscles in the back, as well as the hips, quads and ankles. It helps to completely relax into the stretch and take deep breaths in and out slowly.
Aim to keep your toes together, get your buttocks as close to your heels as possible and reach out as far as your body will allow.
This stretch should help you relax, unwind and relieve back tension.