Imagine pushing your body to its absolute limits, only to have the air itself feel like your greatest adversary. This is the stark reality for Olympians competing at high altitudes, where every breath becomes a battle. But here’s where it gets controversial: while some athletes swear by grueling gym sessions or marathon runs, others turn to unconventional methods like training in brine and seafoam. So, what’s the real secret to conquering altitude? Let’s dive in.
For many Olympic hopefuls, preparation means schlepping to elevations exceeding 10,000 feet, where simply breathing can feel like a workout in itself. Take the Milano Cortina 2026 Olympics, for instance. The venues are scattered across a dramatic vertical landscape, from the Tesero cross-country stadium at 830 meters (2,723 feet) to the dizzying Vertigine downhill start at 2,380 meters (7,808 feet). Lifts soar even higher, reaching 3,244 meters (10,643 feet) atop Tofana, the highest peak in the Tofane massif of the Dolomites. Other sites, like Livigno’s snow park at 1,816 meters (5,958 feet) and the Antholz-Anterselva biathlon arena at 1,600 meters (5,249 feet), sit squarely in the high-altitude zone. At these heights, the focus shifts from raw strength and speed to the intricate dance of blood oxygen levels and cardiovascular function, according to experts in extreme medicine at Northeastern University.
And this is the part most people miss: it’s not just about being fit. At altitude, the air is thinner, meaning fewer oxygen molecules reach your lungs with each breath. ‘Your body scrambles to compensate,’ explains Joshua Merson, an associate clinical professor and extreme medicine program director at Northeastern University. ‘You breathe faster, your heart rate climbs, and your body works overtime to deliver oxygen where it’s needed.’ But this compensation has its limits. Climb too fast, and your body’s systems can start to fail, leading to a dangerous condition called hypoxia—a lack of oxygen that triggers inflammation, disrupts blood pressure regulation, and can even cause fluid to leak into tissues where it shouldn’t.
Hypoxia isn’t just a high-altitude concern. It can occur at ground level too, thanks to factors like long flights, heat stress, illness, or intense training blocks. Sarah Spelsberg, director of U.S. Operations at World Extreme Medicine, notes that the body responds by increasing heart rate, shifting metabolism, and prioritizing oxygen for vital organs. The real danger arises when the demand for oxygen outstrips the supply. For athletes, understanding hypoxia is key to training smarter. It encourages them to pace themselves, recognize early warning signs of overreaching, and adopt intentional recovery strategies like optimizing sleep and hydration.
But here’s the kicker: hypoxia’s symptoms can be subtle. Merson points out that clinicians look for small cues—like an extroverted athlete suddenly going quiet, or a seasoned pro struggling with their gear. These signs often appear long before the classic symptoms of altitude sickness, such as headaches, nausea, and fatigue, become noticeable. Ignoring these early warnings can lead to more severe illness.
History is littered with examples of athletes succumbing to altitude’s effects. At the 1968 Mexico City Olympics (held at 2,250 meters, or 7,382 feet), Australian distance runner Ron Clarke collapsed unconscious after the 10,000-meter race, while U.S. swimmer Suzy Jones fell ill during high-altitude training, later attributing her performance struggles to the thin air. ‘Fitness alone doesn’t protect you from altitude sickness,’ Merson warns. ‘Genetics may play a role too.’
Not all mountain regions are created equal. In New England, even the highest peaks like Mount Washington (6,300 feet) fall well below the elevations where altitude stress becomes severe. In contrast, Colorado’s training venues often exceed 10,000 feet, with peaks towering above 14,000 feet, pushing athletes closer to the threshold where thinner air impacts performance and recovery.
So, what’s the takeaway? Hypoxia awareness isn’t just a nice-to-have—it’s a game-changer for athletes. It helps them distinguish between productive stress and warning signs, reducing injury and burnout while supporting long-term performance. But here’s a thought-provoking question for you: With all the advancements in sports science, why do so many athletes still struggle with altitude? Is it a matter of preparation, genetics, or something else entirely? Let us know your thoughts in the comments below!
