Sport
Heart Rate Zones: The 5-Zone System for Endurance Training
Training without tracking heart rate is like setting sail without a compass. This guide reviews the scientific basis of training zones, alternative…
Read More →
Aerobic vs Anaerobic Energy Systems: The Physiological Story of Energy
A 100-meter sprint and a marathon use almost entirely different energy systems. Understanding the phosphagen, glycolytic, and oxidative systems — when each…
Read More →
Polarized Training: The Complete Scientific Guide to the 80/20 Method
Ingrid Kristiansen, winter of 1993. The Norwegian world-record holder logged her training distribution across a season and discovered, years before the term…
Read More →
Polarized Training: Why 80% Easy Makes You Faster
Going deeper: For the full scientific reference — Norwegian double-threshold method, elite training diaries, molecular biology, taper protocols — see The Complete…
Read More →
Creatine for Endurance Athletes: What the Research Actually Says
Does creatine help endurance athletes? Science-based evidence review.
Read More →
The Science of Hitting the Wall: Why Marathons Fall Apart at Mile 20
Why marathon runners 'hit the wall' around km 32 — the muscle-glycogen depletion physiology behind the bonk and how pacing and fueling…
Read More →
VO2max: What It Is, What It Isn’t, and Why It’s Not the Whole Story
VO2max measures your aerobic ceiling but doesn't predict elite performance. Learn why lactate threshold and economy matter more, and how to improve…
Read More →
Why Whales Outlast Humans Underwater: Animal Endurance Physiology
Cuvier's beaked whale dives 2,992m for 137 minutes. Bar-tailed godwits fly 11,000km nonstop. What animal endurance physiology reveals about human limits.
Read More →
The Central Governor: Is Fatigue a Decision?
The Central Governor: Is Fatigue a Decision? A marathoner with nothing left in their legs sprints the final 200 meters. If they…
Read More →What Is the Lactate Threshold? Why It Matters
What Is the Lactate Threshold? The Most Misunderstood Concept in Endurance Science You've been told lactic acid causes the burn. You've been…
Read More →We use cookies to improve your experience and measure traffic. Google Analytics and any future advertising cookies only run after you accept. Privacy Policy