Iliopsoas muscle

Psoas major muscle

Victoria Thanh Tran B.S | Stretch Therapy | Body Work on Instagram: "During this stretch, we are working your hip flexors, particularly the Iliopsoas (psoas major + iliacus). This is doing most of the work because the hip is placed into true extension while the pelvis is stabilized, which is the strongest lengthening position for the deep hip flexors. By using your knee or hand to stabilize your client (pelvic stabilization), it prevents lumbar compensation, so the stretch stays on the muscle in

Iliacus Muscle - What It Is And How To Release It