William Horkoff

Every year I hear the same thing from age group athletes after a race. “I don’t get it. I trained so hard.” They did the long rides. They hit the intervals. They showed up consistently. And yet somewhere around 25 to 32 km into the marathon, the wheels completely came off. The pace drops. The stride shortens. The heart rate climbs. What was supposed to be a strong finish turns into survival. This is not about toughness. It is rarely about motivation. It is almost always physiology. Most...

One of the most common mistakes new runners make is increasing their mileage too quickly. They begin running, see rapid improvements in fitness, and assume the solution is simply to run more. They see experienced runners logging 80, 100, or even 160 kilometers per week and believe that more mileage is the direct path to better performance. They aren’t wrong in principle. Higher mileage is one of the most powerful drivers of endurance performance. But they’re missing one critical reality: the...

A lot of endurance athletes struggle with sleep and immediately look to stress, caffeine, screens, or training load. All of those matter. But one of the most overlooked contributors to poor sleep in endurance athletes is simply not eating enough. Sleep is not passive. It is an active recovery process that requires energy. When energy intake is consistently too low, the body does not prioritize deep recovery. Instead, it shifts toward survival. Training is a stress. Fuel is the signal that...