CoachingAnswer

WHAT IS VO2 MAX FOR CYCLISTS?

By Anthony WalshRoadman CyclingUpdated 20 June 2026

ANSWER

VO2 max is the maximum rate at which your body can take in, transport and use oxygen during hard exercise, usually expressed in millilitres of oxygen per kilogram of body weight per minute (ml/kg/min). It's the ceiling on your aerobic engine. For cyclists it sets the upper limit of sustainable power: your FTP is the fraction of that ceiling you can hold for an hour, and VO2 max defines how high the ceiling itself sits. It's partly genetic, but trainable — and the higher it is, the more aerobic headroom you have to develop.

KEY TAKEAWAYS

VO2 max is your aerobic ceiling — the most oxygen your body can use per minute.
It's reported relative to body weight (ml/kg/min), so it behaves like a power-to-weight number.
FTP is the fraction of that ceiling you can sustain; VO2 max is the ceiling itself.
It's partly genetic but meaningfully trainable, especially through hard interval work.

WHO THIS IS FOR

IS THIS YOU?

The rider chasing a higher ceiling

Your FTP has crept close to your aerobic ceiling and you want to understand what raising the ceiling itself takes.

The data-curious cyclist

Your watch or head unit shows an estimated VO2 max and you want to know what it actually measures and how much to trust it.

THE ROADMAN VIEW

VO2 max is the headline number everyone knows and few use well. It's a genuine measure — the ceiling on how much oxygen your aerobic system can deliver and burn — and a higher ceiling does mean more potential. But on its own it doesn't win bike races. What you do with the ceiling matters more than the ceiling itself.

The useful way to hold it: VO2 max sets the roof, and your lactate threshold determines how close to that roof you can live. Two riders can share a VO2 max and finish minutes apart over an hour because one holds a far higher fraction of it. That's why we rarely chase VO2 max in isolation — it's developed alongside threshold and a deep aerobic base, not instead of them.

It's also more trainable than the genetic-ceiling story suggests, particularly for amateurs who've never done structured high-intensity work. Done properly, VO2 intervals raise it. But it responds slowly, it's costly in fatigue, and the wearable estimate on your wrist is a rough trend at best. Build the base, train the threshold, add a deliberate dose of VO2 work — and treat the number as one input, not the scoreboard.

EXPERT EVIDENCE

WHAT THE EXPERTS SAY

Prof. Stephen SeilerExercise physiologist, originator of the polarised-training framework
In the polarised model, VO2-level work is the deliberate hard minority that drives high-end adaptation — effective precisely because it's rationed and ridden fresh. The ceiling is raised by a small, well-placed dose of genuinely hard riding sitting on top of a large aerobic base, not by grinding the comfortably-hard middle.
Hear it: 80/20 Training to Ride Faster | Dr Stephen Seiler

PRACTICAL APPLICATION

DO THIS WEEK

Build the base before chasing the ceiling
VO2 work lands best on top of a deep aerobic foundation. Months of easy volume first; high-intensity intervals second, once the base can support them.
Train it with proper intervals, ridden fresh
VO2 efforts are typically three to five minutes near your maximum sustainable effort, with full recovery between. They only work if you arrive rested enough to hit the target.
Treat the wearable estimate as a trend
Watch and head-unit VO2 max figures are modelled estimates, not lab values. Use the direction of travel over months, not the exact number on any given day.

COMMON MISTAKES

WHAT CYCLISTS GET WRONG

MISTAKEChasing VO2 max in isolation.
FIXThe ceiling matters less than how much of it you can sustain. Develop VO2 max alongside lactate threshold and aerobic base, not as a standalone target.
MISTAKETrusting the wearable number to the decimal.
FIXConsumer VO2 max estimates are approximate and noisy. Read them as a long-run trend, and don't let a daily wobble change your training.

FAQ

FREQUENTLY ASKED QUESTIONS

What is a good VO2 max for a cyclist?

It varies hugely with age, sex and training history. Recreational riders often sit in the 40s, well-trained amateurs in the 50s and 60s, and elite professionals can exceed 70–80 ml/kg/min. Your own trend over time is more useful than any single benchmark.

Can you actually improve VO2 max?

Yes, especially if you've never trained it. A meaningful share of VO2 max is genetic, but structured high-intensity intervals on top of a solid aerobic base can raise it — though it responds slowly and costs more fatigue than threshold work.

What's the difference between VO2 max and FTP?

VO2 max is the maximum rate your body can use oxygen — the ceiling on your aerobic engine. FTP is the sustainable power you can hold near your lactate threshold, which sits below that ceiling. You can raise FTP toward your VO2 max; raising the ceiling itself is harder.

How do you measure VO2 max accurately?

The gold standard is a lab test with a mask measuring oxygen uptake during a ramp to exhaustion. Watches and head units estimate it from heart rate and power, which is convenient but approximate — useful as a trend, not a precise figure.

Why is VO2 max measured per kilogram of body weight?

Because cycling performance, especially climbing, depends on power relative to weight. Expressing oxygen use as ml/kg/min makes it comparable across riders of different sizes, the same way power-to-weight does for FTP.

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