Tight hip flexors, especially a deep muscle called the psoas, can silently stress your spine. Here's why this muscle deserves ...

Millions suffer from lower back pain every day – but what if we’ve been blaming the wrong part of the body all along?

The iliopsoas comprises the joined iliacus and psoas muscles. These hip muscles are the main muscles that help the hip to flex. A person can stretch these muscles, which often become stiff with ...

The psoas is an important ribbon-shaped muscle that runs from your lower lumbar spine (the lower back) to the top of the femur (thigh bone), explains Jim White, R.D.N., A.C.S.M. Ex-P, owner of Jim ...

Background Muscular tightness is frequently postulated as an intrinsic risk factor for a muscle injury in soccer. Further, hamstring, iliopsoas and quadriceps flexibility measurements are of clinical ...