How much do we know about fighters like Derrick Lewis, Tuivasa and Tybura or Gaziev's training schedules? Are these guys sparring in the gym every day? Are they lifting weight? Doing ANY cardio? Clearly the quality of the fights is often crap, is this because some limitation of heavyweight where even fit fighters at that weight gas out and don't perform well, or are they just BARELY hitting the gym? Many of their physiques do not look like they are regularly training but do we think Tai for instance sets foot in a gym at all between fights?
Edit* I guess I mean more like mid ranked then low ranked. And I'm genuinely curious, folks have made good points that it's hard to find a partner to make you really work at that size. Others, point to rugby and NFL players with much greater speed and endurance at the same weight.