Ranell Hobson of the Academy of Sport Speed & Agility discusses the importance of players developing strength and mobility in their hips, a key attribute for physical performance in football. I recently spent several weekends assessing the running function and essential mobility of young footballers in preparation of training them in football specific speed. One vital aspect that is continually absent in these players at all levels was mobility in their hips. The muscle group of focus in this article is the hip flexors (Illiacus…