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 EXTENSION. Hip extension involves the action of three muscles contracting in a coordinated sequence. The three muscles are the gluteus maximus(primary mover/agonist), biceps femoris(synergist) and erector spinae(synergist). Any deviation from the specific muscle activation is considered an altered movement pattern.This will cause hip extension dysfunction, muscle imbalance, pain and contribute to changes in posture.here is a specific pattern to the sequence of muscle activation involved during joint movement. Two specific patterns to be discussed are Hip Extension and Hip Abduction(1). Hip extension and hip abduction movement patterns involve specific muscles.