Elite marathoners now take 90 to 120 grams of carbs per hour. Here is the research behind it, the GI trade-off, and what recreational runners should actually do.
Health
Soreness or Injury? The 4 Signs That Decide Whether to Run Through It
The 80/20 training rule separates fast runners from stuck ones. Here is what polarized training actually looks like, backed by Stephen Seiler research.