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.
Hip Function. Your hamstrings perform hip extension -- backward movement of your thigh. Although the gluteal muscles in your buttocks are the main muscles that perform hip extension, your hamstrings assist with this motion as you move from sitting to standing, as well as with squatting and jumping.