Bicarb at Altitude: A Secret Weapon for Tackling Thin Air?

Last night, England secured a historic World Cup victory against Mexico at the iconic Azteca in Mexico City. In the buildup to the match, the media heavily focused on the tactical disadvantage the England squad faced due to the extreme altitude. While weeks of acclimatisation remain the gold standard, the tight modern football calendar rarely allows for it. What if there were something that could help endurance performance at altitude within a matter of hours?

When you exercise intensely at high elevations, reduced oxygen availability forces your body to rely more heavily on anaerobic energy systems. This causes you to produce hydrogen ions (H+) much faster than at sea level, making your usual match or race pace harder to maintain.

This raises a question: can sodium bicarbonate, a well-known extracellular buffering agent, help reduce this rapid fatigue and allow athletes to push harder for longer at altitude?

It isn't just a question for footballers. Millions of athletes find themselves competing at high elevations, from cross-country skiers in alpine environments to runners and cyclists tackling events in high-altitude hubs like Denver or New Mexico.

Fortunately, recent a recent study looked into this. The study evaluated trained male cyclists performing a grueling 40km time trial under acute hypoxia, simulating an altitude of 1,850 meters (approx. 6,000 feet).

While this specific study investigated the MBS, the underlying physiological conclusions apply universally to bicarbonate buffering:

• Bicarbonate Group: Averaged 63:29
• Placebo Group: Averaged 64:15
• The Advantage: Cyclists using bicarb were 1.2% faster, maintaining a higher power output across the entire 65-minute effort.

From the Pitch to the High Plains

To understand how a 1.2% performance increase translates into real-world victories, look at how different sports environments clash with high elevations:

• International Football (Mexico City - 2,240m): At venues like the Azteca, players face a drop in aerobic capacity. While football is a "stop-start" sport, its repeated high-intensity sprints with minimal recovery make a blood buffer critical. Bicarb helps players maintain sprint speeds into stoppage time, preventing the heavy-legged fatigue that ruins late-game execution.
• Endurance Sports (New Mexico - 1,600m+): For runners and cyclists competing in places like Albuquerque or Santa Fe, lowlanders routinely hit the "lactate wall" early. Implementing a bicarb protocol shields the muscles from the early rise in acidity caused by the thin desert air.

Bicarb Protocol At Altitude

The study stuck with the generally recommended 0.3g per kilogram of body weight serving size, meaning there is no suggestion that a different dosage or a special approach is needed at altitude. As with any use of sodium bicarbonate, choosing FLYCARB means getting a proven solution that minimises GI distress, comes in several flavour options, and is affordable.  

The Bottom Line

Bicarb doesn't magically put more oxygen into the atmosphere, but it changes how your body fights the consequences of lacking it. For athletes wanting to compete at altitude, loading sodium bicarbonate is one of the most effective ways to improve performance.