The quadratus lumborum (QL) is a muscle in the lower back that can contribute to low back pain when it becomes tight or strained. This muscle plays a role in stabilizing the spine and pelvis during movement. When the QL becomes tight or imbalanced due to factors like poor posture, repetitive movements, or prolonged sitting, it can cause discomfort or pain in the lower back. Stretching exercises targeting the QL can help alleviate these symptoms by promoting flexibility and reducing muscle tensio

STOP Stretching Your Lower Back Like This | QL Stretch

Quadratus Lumborum Relief in 60 Secs with A Side Bridge Exercise