Coach Education Resources
The Ulta Gap
The gap between men and women in ultra-running isn't one number. It's about 1% at the median and 22% at the podium, in the same races. This interactive post shows why the answer changes with which runners you count, and how to read any gap figure before you repeat it.
From Carbon to Track
Everyone knows a stiffer running blade returns more energy. It has never actually been established. What the evidence can and can't tell a coach.