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.
1 Extensors (back and gluteal muscles). 2  They are used to straighten the back (stand), lift and extend, and abduct the hip (move the thigh away from the body). 3  Flexors (abdominal and iliopsoas muscles). 4  These muscles bend and support the spine from the front.