What Is Altitude Training —
And Why Does It Work?

Altitude training isn't new. Elite endurance athletes have trained at high elevation for decades — running at 8,000 feet in Kenya, cycling through the Alps, preparing for the Olympics at facilities in Colorado. The results have been consistent enough that the science is no longer debated: training with less oxygen makes you significantly better at using the oxygen you have.

What is new is access. Until recently, the physiological benefits of altitude training were reserved for professional athletes with the resources and time to travel to mountain environments. AIRLAB changed that. By engineering a proprietary reduced-oxygen room in the middle of Miami — simulating up to 12,000 feet of elevation — we made altitude training available to anyone willing to show up and work.

Here's exactly what happens when you train at altitude, why it works, and what you can expect from it.

What Happens to Your Body at 12,000 Feet

At sea level, the air you breathe is roughly 21% oxygen. At 12,000 feet — the altitude AIRLAB simulates — that percentage drops to around 14%. Your lungs are still pulling in the same volume of air, but there's significantly less oxygen available in each breath.

Your body's immediate response is to work harder. Your heart rate increases. Your breathing rate goes up. Your cardiovascular system is under more stress to deliver the same amount of oxygen to your working muscles. This is the stress that drives adaptation.

Over time — and this is where the real benefit lies — your body adapts by becoming more efficient. It produces more red blood cells to carry oxygen. It improves the density of mitochondria (the energy-producing structures in your cells). Your cardiovascular system becomes more capable of delivering oxygen under pressure.

When you return to sea level — or in our case, when you walk out of the altitude room — your body retains these adaptations. The result is that you perform better at normal oxygen levels than you did before. More endurance. More power. Faster recovery.

The Key Physiological Adaptations

VO2 Max Increase

VO2 max is the maximum rate at which your body can consume oxygen during exercise. It's one of the strongest predictors of cardiovascular fitness and endurance performance. Altitude training consistently produces measurable VO2 max gains — often in a fraction of the time it would take through sea-level training alone. AIRLAB members regularly report significant improvements after 6–8 weeks of consistent training.

Accelerated Calorie Burn

Because your body is working harder to maintain the same output at altitude, your metabolic rate increases. You burn more calories in the same 45-minute class than you would in an equivalent sea-level workout. For members focused on fat loss, this is one of the most tangible and immediate differences they notice.

Increased Red Blood Cell Production

In response to reduced oxygen availability, your kidneys produce a hormone called erythropoietin (EPO) — the same hormone that makes altitude training so effective for endurance athletes. EPO signals your bone marrow to produce more red blood cells, which means more oxygen delivery capacity throughout your entire system.

Improved Cardiovascular Efficiency

Your heart, lungs, and circulatory system adapt to perform better under oxygen stress. This translates directly to improved performance across all physical activities — not just in the altitude room, but in everything you do outside of it.

Who Benefits From Altitude Training

The honest answer is: almost everyone. The adaptations altitude training drives are fundamental to human physiology. You don't need to be an elite athlete to benefit from them.

• People focused on fat loss — the elevated metabolic demand of altitude training accelerates results that would take significantly longer at a standard gym
• Endurance athletes and HYROX competitors — altitude training directly targets the cardiovascular and respiratory systems that endurance performance depends on
• People who feel plateaued — if you've been training consistently but progress has stalled, altitude introduces a new physiological stressor that forces the body to adapt again
• Anyone who wants to do more in less time — the intensity and efficiency of altitude training means a 45-minute class delivers results that would take significantly longer through conventional training

What Makes AIRLAB Different

There's a difference between passive altitude exposure — simply sitting or sleeping at elevation — and active altitude training, which is what AIRLAB delivers. The combination of physical exertion and reduced oxygen is what drives the most significant adaptations. Our programming is designed specifically to maximize that combination.

Every class at AIRLAB takes place entirely within our proprietary altitude room. The programming — developed by our Director of Programming Giovanni Perez — is built around the unique demands and opportunities of a reduced-oxygen environment. You're not just exercising at altitude. You're training in a system designed to extract the most out of every minute you spend in that room.

The results our members report — rapid fat loss, dramatic improvements in endurance, visible muscle definition — aren't surprising once you understand the science. They're exactly what altitude training is supposed to do.

How to Get Started

Your first class at AIRLAB is free. No credit card, no commitment required. We recommend coming in with an open mind and reasonable expectations for the first session — altitude training is a genuine physical challenge, and your body needs a class or two to begin adapting to the environment.

Most members notice a meaningful shift in how the class feels by their third or fourth session. The breathlessness of the first class gives way to controlled, efficient effort. That's the adaptation happening in real time.

If you're ready to find out what altitude training actually feels like, book your free class below. Midtown Miami and Coral Gables both have availability.