🫁 What Is VO2?
VO2 (Volume of Oxygen) is the volume of oxygen consumed by the body per minute. VO2max is the maximum amount of oxygen that the body can take in, transport, and utilize during intense physical exertion. It is one of the most important indicators of cardiorespiratory fitness, often considered the "gold standard" for assessing the functional capacity of endurance athletes.
📊 VO2max Values by Level
| Sex / Level | VO2max (ml/kg/min) | Examples |
|---|---|---|
| Men — Untrained | 35-42 | Sedentary individuals |
| Men — Amateurs | 42-52 | Regularly exercising 3-4 times/week |
| Men — Elite | 60-85 | Professional cyclists, runners, skiers |
| Men — World Records | 90-97 | Bjørn Dæhlie (96), Kilian Jornet (92) |
| Women — Untrained | 27-35 | Sedentary |
| Women — Elite | 50-70 | Professional endurance athletes |
| Women — World Records | 72-78 | Joan Benoit (78), Paula Radcliffe (72) |
🔧 Measurement Methods
🔬 Direct Measurement (Laboratory)
Gold standard: the athlete runs/rides a bicycle wearing a mask, with an analyzer measuring the O2 and CO2 concentrations in inhaled and exhaled air. The most accurate method.
🏃 Field Tests
Cooper test (12-min run), bleep test (shuttle run), 1.5-mile run. Less accurate but practical for large groups.
⌚ Smart Devices
Garmin, Polar, Apple Watch use heart rate and speed data to estimate VO2max. Error ~5-10%. Suitable for tracking trends.
🚴 Submaximal Tests
Astrand, YMCA bicycle tests — use the heart rate response to submaximal exercise to predict VO2max. Suitable for untrained and clinical populations.
🧬 Factors Limiting VO2max
Why can't VO2max grow indefinitely? Physiological limits:
- Central factors (oxygen transport): Maximum cardiac output — the main limiting factor (about 70-85% of responsibility). The more blood the heart can pump out, the more O2 reaches the muscles.
- Peripheral factors (oxygen extraction): Capillary density, mitochondrial quantity and function in the muscles. In high-level athletes, a-vO2diff can be up to 16-18 ml O2/100ml blood.
- Pulmonary diffusion capacity: Only for very high-level athletes (VO2max >65) the lungs can become a limiting factor — especially at high intensity (exercise-induced arterial hypoxemia).
🎯 How to Increase VO2max?
🏃 Long Endurance Training
60-90 min at LT1 (60-70% VO2max). Increases stroke volume, capillary density, and mitochondrial quantity.
⚡ High-Intensity Intervals (HIIT)
4x4 min at 90-95% HRmax with 3 min active recovery. One of the most effective methods for increasing VO2max.
🔄 Polarized Training
80% low intensity + 20% very high intensity. The elite athlete model — maximum adaptation effect.
🏔️ Altitude Training
A hypoxic environment stimulates erythropoietin (EPO) production, increases hemoglobin quantity, and oxygen transport capacity.
🙋 Frequently Asked Questions
Yes! Understanding oxygen uptake (VO2) helps you train more effectively, avoid injuries, and achieve better results even at the amateur level.
We recommend PubMed, Google Scholar, and Sports Medicine journals. It is also worth following publications from the Lithuanian Sports University.
It depends on the specific study. Some methods require laboratory equipment, while others can be performed with portable devices.
Coaches who understand oxygen uptake (VO2) can individualize training programs, monitor progress, and adjust loads in a timely manner.
📚 Additional Resources and Sources
To deepen your knowledge about oxygen uptake (VO2), we recommend:
- Scientific publications and conferences of the Lithuanian Sports University (LSU)
- International journals: Journal of Sports Sciences, Medicine and Science in Sports and Exercise
- Annual congresses of the European College of Sport Science (ECSS)
- Sports science podcasts: Science of Sport, The Real Science of Sport
- Sports science programs of the Lithuanian National Olympic Committee (LTOK)
⚡ Pro Tip
Sports science is constantly evolving. What was considered true 10 years ago may be refuted today by new research. Be curious, read the latest literature, and don't be afraid to experiment — of course, while following safety principles.