This pose helps relieve lower back pain and stimulates blood circulation

Supta padangusthasana — supta (recline), pada (foot) and angustha (big toe) — translates to "reclining big toe pose" and is an excellent way to develop flexibility in the calves and hamstring muscles while toning and shaping the legs.
It's a posture of choice for those with back problems, as it brings relief to the lower back and increases flexibility in the prone side of the body without straining the back.
Procedure
Benefits
Caution
Do not practise this posture if you have had a recent back injury.
Bharat Thakur guides you through practices that will connect you to the wisdom of the ancient Indian science of exercising.