What does this tool do?
The Uth–Sørensen–Overgaard method estimates VO2 max from the ratio of maximum to resting heart rate. It is a convenient field estimate when a lab test or a hard time trial is not available.
The Formula
VO2 max ≈ 15.3 × maximum heart rate ÷ resting heart rateFrequently Asked Questions
What does VO2 max measure?
It is the maximum rate at which your body can take up and use oxygen during hard exercise, usually expressed per kilogram of body weight. Higher values generally indicate better aerobic fitness.
Is the heart-rate ratio method accurate?
It is a rough field estimate, often within about 10–15% of a lab result when both heart rates are measured properly. A graded exercise test is more accurate.