Knickerbocker's theory emphasizes on the interdependence of major players in the same industry. Imitation is the name of the game where firms try to match each other's moves to keep each other in check so as not to allow a rival gain a competitive advantage over others.
hamstrings. extend the hip and flex the knee against resistance and are important knee stabilizers. help control hip flexion in weightbearing position by contracting eccentrically when the flexion occurs in same direction as gravity as dead lift or hip=hinge position.
The hip flexors are a group of skeletal muscles that act to flex the femur (thigh bone) onto the lumbo-pelvic complex, i.e., pull the knee upward. The hip flexors are (in descending order of importance to the action of flexing the hip joint):[1] Collectively known as the iliopsoas or inner hip muscles: Psoas major. Psoas minor. Iliacus muscle. Anterior compartment of thigh. Rectus femoris (part of the quadriceps muscle group) Sartorius.