If you’ve trained with us at The Resilience Lab, you know that the journey doesn’t end after the course.
We place a strong emphasis on continuing your training well beyond those initial sessions—a process we call acclimatisation.
Much like the original meaning of the word, acclimatisation is all about helping your body adapt to the controlled stressors you introduce. It's the foundation for developing lasting resilience and ensuring your gains become second nature over time.
Here's a summary of how it works…
High CO2 vs Hypoxic Training
At The Resilience Lab, our training falls into two broad categories: High CO2 (or CO2 Tolerance) Training and Hypoxic (High Altitude Simulation) Training.
While both methods are designed to help you control your nervous system in high-stress moments, each works in a unique way.
High CO2 Training pushes your body to adapt to elevated carbon dioxide levels. By combining high-intensity exercises with exhale breath holds, we drive up residual CO2.
The body responds with effects similar to the Mammalian Dive Reflex: a lower heart rate, cerebral vasodilation, selective vasoconstriction, and spleen contraction. These adaptations support physical performance even under intense CO2 stress.
Hypoxic Training, on the other hand, simulates a low-oxygen environment, prompting the body to produce more erythropoietin (EPO), which increases red blood cell (RBC) count.
This process enables more efficient oxygen use, but it takes time—typically a few weeks—making consistent training critical for maximizing these adaptations.
We’ve gone into more detail on this topic over on our YouTube Channel, so why not jump across and geek out with us!?!?
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