1.5-mile run method (George formula): VO2 max = 88.02 − (0.1656 × weight kg) − (2.76 × time in minutes) + (3.716 × gender factor, male=1/female=0)
Resting heart rate method (Uth formula): VO2 max = 15.3 × (max HR / resting HR). Max HR is estimated as 220 − age. This method has approximately ±10% accuracy.
VO2 max is measured in ml/kg/min and represents the maximum rate at which your body can use oxygen during exercise. Higher is better. Elite endurance athletes score 70–90+; recreational athletes typically score 35–55.
Frequently Asked Questions
For men aged 20–29: Poor <38, Fair 38–43, Good 44–51, Excellent 52–61, Superior 62+. For women aged 20–29: Poor <28, Fair 28–34, Good 35–43, Excellent 44–50, Superior 51+. These ranges shift slightly with age — a 50-year-old man with a VO2 max of 42 is doing very well.
The most effective training for VO2 max improvement is high-intensity interval training (HIIT) — specifically intervals at 90–100% max HR for 3–8 minutes. 4×4 intervals (4 minutes hard, 3 minutes rest, repeated 4 times) have strong research backing. Expect significant gains within 6–8 weeks of consistent training.
It's one of the best predictors of cardiovascular health and endurance performance, but it's not the whole picture. Lactate threshold (the pace you can sustain for long periods) often matters more for race performance. Running economy (how efficiently you use oxygen at a given pace) is equally important for distance runners.