The single leg hamstring stretch relives pressure from the lumbar level because a tight hamstring can tilt the pelvic and compromise the natural lumbar curve; placing pressure on the ultimately resulting in an inflamed Sciatic Nerve.
{The hamstring stretch single leg stretch relives pressure from the lumbar level because a tight hamstring can tilt the pelvic and compromise the natural Lumbar curve putting pressure on the nerves because of reduces space in the vertebrae}