CoachingAnswer

WHAT IS VO2MAX IN CYCLING?

By Anthony WalshRoadman CyclingUpdated 10 July 2026

ANSWER

VO2max is the maximum rate at which your body can take in, transport, and use oxygen during maximal exercise, expressed in millilitres of oxygen per kilogram of body weight per minute (ml/kg/min). For cycling, VO2max sets the upper ceiling of aerobic performance — FTP typically sits at 72-82% of VO2max power in trained cyclists. Untrained adults average 35-45 ml/kg/min. Trained club cyclists reach 50-60 ml/kg/min. Elite amateurs produce 60-70 ml/kg/min, and professional Grand Tour riders have recorded values above 80 ml/kg/min. VO2max is trainable by 15-25% from baseline, with the fastest gains coming from intervals at 90-100% of maximal aerobic power.

KEY TAKEAWAYS

VO2max is the maximum oxygen consumption rate — it sets the ceiling for aerobic performance.
FTP typically sits at 72-82% of VO2max power in trained cyclists.
Trained club cyclists average 50-60 ml/kg/min; elite professionals exceed 80 ml/kg/min.
VO2max is trainable by 15-25% from baseline through structured interval work at 90-100% of maximal aerobic power.

WHO THIS IS FOR

IS THIS YOU?

The data-driven cyclist

You see VO2max estimates on your watch or app and want to understand what the number means and how accurate it is.

The rider who wants a higher ceiling

You have improved your FTP but want to understand the relationship between VO2max and threshold to break through the next plateau.

The masters cyclist

You know VO2max declines with age and want to know how much you can slow that decline.

THE ROADMAN VIEW

VO2max is the ceiling. FTP is the floor you can sustain within that ceiling. If your VO2max is low, your FTP is constrained — you can only sustain a percentage of a percentage. Raise the ceiling and you raise the floor with it.

The practical implication is straightforward: if your FTP has stalled and you have been doing threshold work consistently, the bottleneck may be VO2max. Adding one to two sessions per week of VO2max intervals — 3-5 minute efforts at 106-120% of FTP — lifts the ceiling and gives your FTP room to grow.

One caveat: the VO2max numbers you see on consumer watches and apps (Garmin, Apple Watch, Wahoo) are estimates based on heart rate algorithms, not laboratory measurements. They track trends reasonably well over time but the absolute number can be 5-10% off in either direction. Do not compare your Garmin estimate to a lab-tested professional's value.

EXPERT EVIDENCE

WHAT THE EXPERTS SAY

Dr Inigo San MillanExercise physiologist, University of Colorado
VO2max represents the integrated capacity of the pulmonary, cardiovascular, and muscular systems to transport and utilise oxygen. In trained cyclists, FTP occurs at 72-82% of VO2max power. Raising VO2max through targeted interval work at 90-100% of maximal aerobic power increases the absolute power output at FTP even without changes in the percentage relationship.
Dr Stephen SeilerExercise physiologist, University of Agder
VO2max intervals of 3-5 minutes at 90-100% of maximal aerobic power, with equal or slightly shorter recovery, are the most time-efficient method for improving VO2max in trained cyclists. The key is accumulating 15-25 minutes of total work time at or near VO2max in a single session — the interval structure that achieves this is less important than the total time at intensity.

PRACTICAL APPLICATION

DO THIS WEEK

Perform VO2max intervals once to twice per week
5-6 x 3-5 minutes at 106-120% of FTP with 3-5 minutes active recovery. The goal is to accumulate 15-25 minutes of work time near your VO2max. Heart rate should reach 90-95% of maximum by the end of each interval.
Track VO2max trends over months, not days
Watch-based VO2max estimates fluctuate daily due to hydration, fatigue, and ambient conditions. Look at the 30-day rolling average for a meaningful trend. A sustained upward trend over 8-12 weeks indicates genuine improvement.
Get a laboratory test for your baseline
A ramp test to exhaustion with gas analysis gives you a true VO2max value and identifies the power and heart rate at which you reach it. This costs roughly $150-250 and provides a precise training anchor that consumer devices cannot match.
Maintain VO2max with one weekly session during other training phases
VO2max declines within two to four weeks of detraining. Even during base-building or recovery phases, one short VO2max session per week preserves the adaptation without disrupting the primary training focus.

COMMON MISTAKES

WHAT CYCLISTS GET WRONG

MISTAKETrusting watch VO2max estimates as absolute values.
FIXConsumer VO2max estimates are algorithmic predictions based on heart rate, not direct oxygen measurements. Use them for trend tracking over weeks, not for comparisons with laboratory-tested athletes.
MISTAKEOnly training VO2max and neglecting zone 2.
FIXVO2max work is high stress and requires a large aerobic base to absorb. The polarised model — 80% zone 2, 20% VO2max and threshold — produces better long-term results than high-intensity-only approaches.
MISTAKEConfusing VO2max with fitness.
FIXA high VO2max is necessary but not sufficient for cycling performance. FTP, lactate clearance, fat oxidation, fuelling strategy, and pacing all determine race results independently of VO2max.

FAQ

FREQUENTLY ASKED QUESTIONS

What is a good VO2max for a cyclist?

For male cyclists: untrained 35-45 ml/kg/min, recreationally active 45-55, trained club rider 55-65, elite amateur 65-75, professional 75-85+. Female values are approximately 10-15% lower at equivalent training levels due to differences in haemoglobin concentration and lean body mass.

Does VO2max decline with age?

Yes. VO2max declines approximately 1% per year after age 25 in sedentary individuals. In trained endurance athletes who maintain high-intensity training, the decline is closer to 0.5% per year. Continued VO2max interval work is the most effective way to slow this decline.

Can you have a high VO2max but a low FTP?

Yes. VO2max is the ceiling, but FTP depends on the percentage of VO2max you can sustain. A rider with a high VO2max but poor lactate clearance or low fat oxidation rate will have an FTP that sits at a low percentage of their VO2max — meaning significant room for improvement through threshold and zone 2 training.

Is VO2max genetically determined?

VO2max has a significant genetic component — approximately 50% of the variation between individuals is heritable. However, the trainable component (15-25% improvement from baseline) is substantial and represents the difference between a recreational and competitive cyclist for many people.

How long does it take to improve VO2max?

Measurable VO2max improvements appear within four to six weeks of consistent interval training. Most of the trainable improvement is realised within 12-16 weeks. Beyond that, gains become smaller and require more training volume or novel stimuli.

Does altitude training improve VO2max?

Living at altitude (1,800-2,500 m) and training at lower altitude increases red blood cell mass and oxygen-carrying capacity, which can improve sea-level VO2max by 1-3%. The classic protocol is 'live high, train low' for three to four weeks. The effect is temporary and diminishes within two to four weeks of returning to sea level.