Performance
Train for heat, altitude, and the course.
Evidence-based guides for trail ultrarunners. Heat acclimation, oxygen delivery, and how to match prep to the race you entered.
Course readiness scoreCourse DNA racesFoot care guideRunner's high guide
Performance
Heat, altitude, and course prep
Three articles on heat acclimation, hemoglobin and oxygen delivery, and buffering strategy when the course runs hot.
Performance
Heat, altitude, and hemoglobin for trail running
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. ...
Heat
The performance effects of sauna use for trail runners
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...
Heat
How bicarb supports performance in hot conditions
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...
Cannabis and endurance
Runner's high, endocannabinoids, and policy
An independent research review of the physiology, cannabis co-use in trail running, performance vs enjoyment evidence, WADA rules, and where commercial claims outrun the data.
Cannabis & endurance
Runner's high, cannabis, and endurance running
The runner's high is real. For decades, endorphins got the credit. The stronger story now points to endocannabinoids, especially anandamide, rising with sustained aerobic work. Cannabis has followed that science into running culture: co-use is common in legal states, and brands like Offfield sell precision-dosed gummies built on the same mechanism. The split that matters for athletes is simple. Enjoyment often goes up. Power and pace usually do not. This is an independent review of the physiology, the trials, antidoping policy, and where commercial claims outrun the data.
Read the review