Hip flexion is the movement that brings the thigh closer to the abdomen. This action occurs at the hip joint, where the femur (thigh bone) moves upward and forward. It is primarily facilitated by the iliopsoas muscle group, which includes the psoas major and iliacus muscles. Hip flexion is essential for various activities, such as walking, running, and climbing stairs. It plays a crucial role in maintaining balance and stability during movement. Understanding hip flexion can help in improving athletic performance and preventing injuries related to the hip and lower back.