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.
Too common. The hip flexor is a group of muscles that cross the front of the hip. Their primary job is to help move your leg, pulling your knee to your chest or lifting your foot off the ground. For the hip flexor to do their jobs, the rest of the muscles in your hips and core need to be pulling their weight.