It would be interesting to know how much the Bills use machines and muscle isolation exercises as compared to whole body exercises like, sand bags, kettlebells, Olympic lifts, sled pushing and pulling, hill sprints, tire lifts, heavy bag punching and kicking and so on- the reason people went to machines is it seemed like a good way to limit injuries in training but sports are dynamic and for the last ten+ years more trainers have been going in the direction of trying to build strength and conditioning using full body exercises that build strength in all different angles and directions.