How to Balance Your Energy System With Your Interval Workout

"There's one energy system. It is a single system, elegantly coordinated so much that if you do anything for more than about three seconds, every part of the system is starting to unwind and unfold," he says. "I hate it when people refer to anaerobic glycolysis because my point is Glycolysis is always anaerobic." The idea that you suddenly don't have oxygen is 'stupid,' Dr. Hoenig adds.