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VO₂ MAX TESTING

Measure your capacity. Optimize your Longevity.

VO₂ max measures how effectively your heart, lungs, and muscles use oxygen during exercise. It is one of the most important indicators of cardiovascular fitness and long-term health.

At Peak, it is measured directly, breath by breath—not estimated by a watch.

Approximately 30 minutes

Personalized training zones

Same-day results

MEASURE MY VO₂ MAX

VO₂ Max & Resting Metabolic Rate

The number that predicts how long you'll live.

VO₂ max — the maximum volume of oxygen your body can use during exercise — is the single strongest predictor of all-cause mortality after age 40. Each one-MET improvement in cardiorespiratory fitness is associated with roughly a 13% reduction in all-cause mortality risk. We measure it directly, breath by breath — not estimated from a wearable.

VO₂ Max • measured directly • ~20 min test

RMR • indirect calorimetry • 10–15 min

Results • same day

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Start with Testing
WHY VO₂ MAX?

Your fitness, measured.

Your results show:

  • Your directly measured VO₂ max
  • How your fitness compares for your age and sex
  • Personalized heart-rate training zones
  • A baseline for tracking progress over time

Whether you are training for performance or protecting your independence later in life, VO₂ max shows where you stand and where to focus next.

RESTING METABOLIC RATE

Your metabolism, measured.

RMR testing measures how many calories your body uses at rest. It provides a more individualized starting point for nutrition than an online calculator or standard formula.

Use it to set smarter targets for fat loss, weight maintenance, or building lean mass.

10–15 minutes

Indirect calorimetry

Same-day results

MEASURE MY METABOLISM

What We Measure

Two tests. One metabolic picture.

Group A

VO₂ Max

Four numbers, measured breath by breath during a graded exercise test.
  • Cardiorespiratory fitness in ml/kg/min, with your age- and sex-adjusted percentile. The raw number means little without the cohort it sits in.
  • Calorie burn across intensities — what you actually expend at each level of effort, which is what makes a training plan and a nutrition plan agree with each other.
  • Heart-rate training zones — set from your measured response rather than the 220-minus-age estimate most watches use.
  • Aerobic efficiency and performance capacity — how much work you can produce for a given oxygen cost, and where that ceiling currently sits.
Group B

Resting Metabolic Rate

Four numbers, measured at rest by indirect calorimetry.
  • Your baseline daily calorie needs — measured by indirect calorimetry rather than estimated from a formula.
  • How to structure a deficit or surplus safely — the floor below which you start losing lean tissue instead of fat.
  • Whether your metabolism is suppressed or running where it should be. Years of under-eating leave a signature, and it is measurable.
  • How your hormone status may be influencing it — thyroid and sex hormones both move resting expenditure, which is why this test is read alongside your panel rather than on its own.
WHAT TO EXPECT

Simple from start to finish.

Measure
Complete your VO₂ max test on a treadmill or bike and your RMR test while resting comfortably.
Understand
We explain your results during the same visit, including what they mean for your fitness and metabolism.
Apply
Use your numbers to make more informed decisions about training, nutrition, and long-term health.

Interpretation

A printout is not a plan.

Any lab can hand you a number. The value is in what gets prescribed off the back of it.

The result is read against your percentile, your history, and the rest of your panel — then a target is set, and the training that reaches it. In practice that usually means a specific weekly volume at low intensity, a smaller dose of harder work, and a retest date. Zones come from your measured response, so the prescription is specific to your physiology rather than a category you were sorted into.

RMR does separate work. It sets the floor on any deficit we prescribe, which is how we avoid the pattern that undoes most weight loss — cutting calories far enough that the body gives up lean tissue alongside fat. Paired with a DEXA scan, we can see whether what you are losing is the thing you wanted to lose.

VO₂ max is System 2 of the Peak Longevity Six. It is measured alongside the other five, because a strong number here does not compensate for a weak one elsewhere.

Retest cadence

  • Most patients retest every 3 to 6 months.

We do not test more often than quarterly unless there is a clinical reason to — the biology does not move fast enough for it to tell you anything.

COMPLETE FITNESS + METABOLIC ASSESSMENT

Three measurements. One complete baseline.

Combine DEXA body composition, VO₂ max, and resting metabolic rate to measure your body composition, cardiovascular fitness, and metabolism.

VO₂ max testing

$250

Resting Metabolic Rate

$100

VO₂ max + RMR

$350

DEXA + VO₂ Max + RMR

$500

BOOK MY COMPLETE ASSESSMENT
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Your future capacity is built today.

Know where you stand. Build what comes next.
START WITH TESTING