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 abduction occurs when the femur moves outward to the side, as in taking the thighs apart. Hip adduction occurs when the femur moves back to the midline. Many muscles contribute to these movements: 1  Medial rotation of the hip is carried out by gluteus medius and gluteus minimus. 2  The psoas is the primary hip flexor, assisted by the iliacus. 3  The pectineus, the adductors longus, brevis, and magnus, as well as the tensor fasciae latae are also involved in flexion.