Training Fuel

Become a Better Butter Burner

You can adapt your body to tap your vast energy reserves of fat through diet and training. Here’s how.

Five Questions About Fuel

Experts explain why it is worthwhile for runners to focus on fat-burning metabolism and blood sugar management.

No-Fuel/Slow-Fuel Long Runs

Low-glycogen long runs produce greater fat burning, more muscle fiber recruitment, a boost to the aerobic system, and a lot of mental toughness.