Supine back stretch
While lying on the back(supine) bring both knees up and towards the chest. Place hands behind knees and gently pull both legs towards chest, stretching back muscles.
Excellent stretch for the lower back. It can help relieve muscle spasm and reduce risk of injury(muscle strain) to back muscles. When performing stretch, one may initially feel increased tightness or pain. Hold the stretch until you can feel muscles relax and tightness subside. May hold stretch as long as a minute.
Muscles- back extensor muscles