The iliopsoas is a major muscle group in the hip region, consisting of two muscles: the iliacus and the psoas major. It plays a crucial role in hip flexion, allowing movements such as lifting the thigh towards the body and bending at the waist. This muscle group is essential for activities like walking, running, and climbing stairs. The iliopsoas is located deep within the abdomen and connects the spine to the femur (thigh bone). It is often targeted in exercises aimed at improving flexibility and strength in the hips. Proper function of the iliopsoas is important for overall mobility and stability.