Performance
Train for heat,
altitude, and the course.
Evidence-based guides for trail ultrarunners. Heat acclimation, oxygen delivery, buffering in hot conditions, and how to match prep to the race you entered.
Heat, altitude, and hemoglobin for trail running
Performance
Heat and altitude both limit how much work your muscles can do. They do it through different paths. Thin air lowers the oxygen you pull in with each breath. ...
The performance effects of sauna use for trail runners
Heat
Canyon ultras punish athletes who only trained in cool mornings. Western States drops from high country into walls that hold heat past 100°F. Badwater is the...
How bicarb supports performance in hot conditions
Heat
Hot ultras raise acid load. You power hike climbs, run runnable flats when the gut allows, and repeat for hours. Heat pushes core temperature up. Cardiac dri...