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Runner's High: The Science Behind the Euphoric Running Experience Last updated: May 1 , 2025 | 9 min read | Evidence-based sports science Have you ever wondered why some runs feel absolutely magical while others feel like pure torture? The secret lies in a fascinating neurobiological phenomenon known as "runner's high"—a natural euphoric state that can transform your running from a dreaded chore into an addiction-like craving. Understanding the science behind this experience can help you unlock one of running's most powerful rewards. 🏃‍♂️ Table of Contents ✨ What is Runner's High? Complete Definition 🧬 The Science: Endorphins, Endocannabinoids, and Brain Chemistry ⏱️ When and Why Runner's High Occurs 👥 Why Not Everyone Experiences Runner's High 🎯 How to Maximize Your Chances of Runner's High 🧠 Psychological and Environmental Factor...