The iliopsoas muscle is the major flexor of your hip joint. It’s made up of two muscles: the iliacus, the psoas major. These muscles work together to flex your hip, as well as stabilize your hip and ...

With weak glutes, the body must find other ways to propel itself forward. The hamstrings and the erector spinae (lower back muscles) are forced to overwork. This leads to chronic hamstring tightness ...