Got tight hip flexors? If so, it’s worth considering that the hip flexor group includes a diverse cast of characters. The muscles in this group have various attachment sites and fiber directions, which affect how they move the joint. While they all produce hip flexion, they affect the joint in slightly different ways. So if you’re trying to stretch your tight hip flexors, try playing around with adding other movements like external rotation of the hip, knee flexion, and posterior pelvic tilt of the pelvis.