What muscles cause hip flexion?

Various muscles located in the hip and pelvic regions work together to create hip flexion. Those muscles are the iliopsoas, rectus femoris, sartorius, pectineus and tensor fasciae latae.

The iliopsoas are the iliacus and psoas muscles. They join when they go into the pelvis and the inside thighbone under the hip joint. The rectus femoris is one of the quad muscles that also extends the knees. The sartorius gives support to the rectus femoris and iliopsoas and helps with leg rotation and outer thigh movement. The pectineus muscle is short and lies on the front of the pelvis, while the tensor fasciae latae is situated on the outside of the hip.