Editorial

Most anti-chafing products are designed for efforts that last about an hour. But somewhere around the two-hour mark of a marathon, the product breaks down. Sweat saturates the barrier. Friction increases. And the damage begins quietly, then all at once.

Most runners choose anti-chafe products the same way they choose energy gels: by brand recognition, not by what’s actually inside. The difference between a product that dissolves at mile 8 and one that’s still working at mile 26 comes down to formulation chemistry.

Blisters are the most common injury in ultramarathon running, and the most preventable. Most blister prevention advice is written for marathoners. For 100-mile runners covering technical terrain for 20 to 30 hours, that advice falls short.

How minor irritations create major biomechanical problems—and why protecting your feet before symptoms appear is the smartest training decision you’ll make.

How endorphins, endocannabinoids, and BDNF transform running from physical exercise into one of the most effective interventions for anxiety and depression.

Every stride generates forces that compound over 26.2 miles. Understanding the science of friction, moisture dynamics, and barrier protection isn’t optional—it’s what separates runners who finish strong from those sidelined by preventable skin breakdown.

Discover the best running hydration vests for ultra marathon training and racing. Expert guide to premium systems from Salomon, HOKA, NNormal, and more.