In the modern era of "high-intensity interval training" (HIIT) and "no pain, no gain" fitness culture, the suggestion to slow down is often met with scepticism. However, if we look at the gold standard of exercise physiology, the evidence is clear: to run fast, we must first master the art of running slowly. Today, I want to take a deep dive into a seminal paper that forms a cornerstone of my coaching philosophy: "Maximum Aerobic Function: Method for Determining Aerobic Fitness in the Resistance Era" by Dr Phil Maffetone and Prof. Paul Laursen (2016). The "Resistance Era": Why We Are Over-Training The authors begin by identifying a modern crisis in fitness. We live in an "over-fat" and "over-stressed" society, yet our approach to exercise is often to add more stress. Maffetone and Laursen argue that many athletes are stuck in a cycle of "anae...