Secondary hip flexors, such as the pectineus and sartorius muscles, contribute substantially to hip flexion and stabilization throughout movements. The pectineus functions as both a hip flexor and secondary adductor. Indeed, hip pain can in some cases be referred pain from the reduce back again, notably in disorders like sciatica https://www.theorthopaedicandpainpractice.com/i-have-pain-over-the-front-of-my-hip-do-i-have-femoral-acetabular-impingement/