Hip flexor muscles majorly include iliacus and psoas major, collectively known as the iliopsoas. Other muscles helping in hip flexion are the rectus femoris, sartorius, and tensor fascia lata(TFL). The primary function of hip flexors is lifting your knee to your chest and bending at the hips. These muscles help you in walking and kicking. … Continue reading 5 Best Hip Flexor Stretches →