Trail and ultra running is the endurance sport where altitude training delivers the most from a single structural intervention. The reason is direct. The protocol produces two distinct adaptations, and trail runners benefit from both. The first adaptation is haematological. Increased Hbmass and the sustained aerobic performance gain that comes with it....

The Sleep Cloud and the Altitude Bedroom System solve the same protocol problem through different engineering. Both deliver consistent overnight altitude exposure at 2,500m or higher. Both produce the same Hbmass response inside a properly dosed block. Both run through the same Box Altitude App for cumulative dose tracking and protocol fidelity.

Josh Kerr’s altitude strategy extended far beyond a traditional training camp. Living and training at moderate altitude in Albuquerque, he then slept at a higher simulated altitude in a Box Altitude bedroom—creating an around-the-clock approach to altitude exposure. Discover how this “live medium, sleep high” model became part of the preparation behind...

The masters demographic is structurally important to endurance sport. Race fields at Western States, UTMB, Boston, Kona, and the broader competitive endurance calendar carry meaningful representation in the 45 to 65 age bracket. The serious masters athlete is typically experienced, self-aware, and pursuing performance inside a different physiological context than the athlete...

Project 222: Inside Josh Kerr’s World Record Journey—and Box Altitude’s Role Some world records happen unexpectedly. Others are planned years in advance. Josh Kerr’s historic 3:42.66 mile world record was the latter. Long before stepping onto the track at London’s Diamond League meeting on 18 July 2026, Kerr publicly announced his ambition...

Sleeping at moderate altitude through normobaric hypoxia is among the most studied physiological interventions in endurance sport, with several decades of peer-reviewed research and an established safety profile across multiple athletic populations. For the cautious first-time evaluator, the partner of an athlete who is the other decision-maker in a household purchase, or...