Your first VO₂ max test, minute by minute

What the test actually is

You breathe through a mask while a bike or treadmill ramps the resistance up every minute. A metabolic cart measures the oxygen you're using. When your oxygen uptake stops rising even though the load keeps climbing, that's your VO₂ max — the ceiling of your aerobic engine.

It takes about ten minutes of actual work. The last four are deeply unpleasant in a way that's weirdly satisfying to have survived.

What you'll feel

Minutes one to five feel like a warm-up that got ambitious. Around minute six your legs file a complaint. By minute eight you're negotiating. Then it's over, and the worst part was roughly ninety seconds — most people say they'd do it again tomorrow, and nobody means it.

The mask is the famous bit and it's honestly fine. Tight seal, mild claustrophobia for the first minute, then you forget it exists because the legs are louder.

What the number changes

Everything, if you train to heart rate or power zones. Your five zones stop being a watch's guess and start being physiology — easy runs actually become easy, threshold work lands on the real threshold.

Retest in six to twelve weeks and the change shows up as a number, not a vibe. That's the whole reason the performance lab exists.

Practical notes

Come rested, eat light three hours before, normal caffeine is fine. Book the full panel if you want the InBody and movement screen in the same visit — pricing is on the price page.