Standing sideways, lean on a wall with the shoulder, feet 1-2 feet away and both together.
Keep shoulders down away from ears.
Tuck elbow into side (and back slightly) then slowly let your hip drop towards the wall until you feel a restriction (this is not always felt).
Return to the start.
You don’t need to force the movement or hold the stretch but nudge it gently.
Repeat 10 times on each side twice.
If something doesn't feel right then don't do it. Mobilising restricted tissue can be uncomfortable but it should not be unbearable. Please use common sense!