Supine spinal rotation (Lower trunk rotation AROM, to comfort, arms out to side, supine feet standing)

Lie on your back with your knees bent and your feet flat on the floor.
Stretch your arms out to the sides and keep your shoulders on the mat at all times.
Keeping your knees together, drop them down to one side.
Return to the starting position, and take your knees across to the opposite side.
Only drop your knees as far as you go comfortably.