Everyone has a perfect pace? (Read 765 times)

Good question. As I mentioned elsewhere, this study defines efficiency ONLY in terms of calories burned per unit of distance. It did not look at the calorie source (i.e., fat versus glycogen). If you were running at the most efficient pace by this definition, and therefore burning mostly glycogen as a fuel source, you would run out of fuel long before you hit your 100 miles. And, for reasons that remain poorly understood, at higher efforts, our bodies fail for reasons having nothing to do with calorie source or usage rates; I cannot sustain my 5k effort pace beyond 5k, no matter how much glycogen I have on board.