Activation of the gluteus maximus (GM) and hamstring muscles during withprone hip extension with knee flexion (PHEKF) in three hip abduction positions was explored by researchers Sun-Young Kang, Hye-Seon Jeon, Ohyun Kwon, Heon-seock Cynn, Boram Choi. They concluded that to facilitate the activation of GM in PHEKF it should be performed in 30° abduction and their results were published in in Manual Therapy … Continue reading