Save for later! If your side or low back is acting up, it might be your quadratus lumborum (QL). @joeythurmanfit shares simple stretches to release tension, improve mobility, and support your spine (no equipment needed!). Try holding each stretch for 20–30 seconds, once or twice a day. #webmd #backpain #lowbackpain #mobility #stretching #painrelief #fitness #consumerhealth