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.
Leg Extensions. The leg extension exercise works out just one major muscle group, your quadriceps, or quads.. Your quads run along the front of your thigh from your knee to your pelvis and are responsible for hip flexion and knee extension.