What causes the 'runner's high' and how can you achieve it?

DISTANCE RUNNERS…THIS IS WHY YOUR LIFTING ISN’T WORKING. 📉 You lift… But it’s light weight High reps Endless circuits And you still expect to get faster. Here’s the reality: ❌ High-volume lifting trains fatigue ❌ Fatigue does NOT transfer to faster running ❌ Running performance is limited by force production, not soreness Speed is force. Efficiency is force. Injury resilience is force. Research consistently shows that low-volume, heavy strength training (70–90% 1RM) improves: • Running economy