How VO2max is estimated
VO2max is the largest amount of oxygen your body can use per minute per kilogram of body weight. The exact value is measured in a lab from respiratory gases, but field tests give a good enough estimate. In the Cooper test (1968) you run for 12 minutes and VO2max = (distance in meters − 504.9) / 44.73.
In the 2.4 km (1.5 mile) run test, VO2max = 483 / time in minutes + 3.5. The resting heart rate method (Uth et al. 2004) needs no running: VO2max = 15.3 × max heart rate / resting heart rate. It is the roughest, but shows direction without a test.
Which test to choose
Cooper and the 2.4 km run are the most accurate because they measure actual performance. Both require that you really run at your max, so warm up well and test when rested. The result is on the low side if running technique is weak or you are not used to running hard.
The resting heart rate method suits a rough estimate without a test, for example from the morning heart rate your watch records. Its error is clearly larger, but a change in resting heart rate reliably reflects a change in fitness.
How to improve aerobic capacity
The most effective combination is plenty of low-intensity base endurance (heart rate zone 2) and 1-2 interval sessions a week near max, for example 4 × 4 minutes in zones 4-5. For a gym-goer, 2-3 endurance sessions a week alongside strength training is enough for clear progress in a few months.
VO2max declines with age by about one percent a year without training, but regular endurance training slows the decline significantly. It is one of the strongest predictors of health and lifespan in research, so tracking it is worth it for lifters too.
Frequently asked questions
What is VO2max?
VO2max is maximal oxygen uptake: the largest amount of oxygen the body can use per minute per kilogram of body weight (ml/kg/min). It describes the ceiling of endurance fitness and is one of the strongest predictors of health in research.
What is a good VO2max?
It depends on age and sex. Roughly, for a 20-29-year-old man over 45 and for a woman over 38 ml/kg/min is good, and thresholds drop about 3 units per decade. The calculator's table is SisuLift's own rough banding, not an official norm table.
How do I test VO2max myself?
Cooper test: run for 12 minutes as far as you can and enter the distance. Alternatively, run 2.4 km as fast as possible and enter the time. Both need a warm-up and a true maximal effort. Without a test, resting heart rate gives a rough estimate.
How do I raise my VO2max?
Plenty of base endurance in heart rate zone 2 and 1-2 interval sessions a week near max, for example 4 × 4 minutes. Beginners progress fast, and a few months of regular training typically raises the figure by 10-20 percent.
Does a lifter need VO2max?
Not competitively, but for health and recovery, yes. Better aerobic capacity speeds recovery between sets and between sessions. 2-3 easy cardio sessions a week will not eat into strength if kept in heart rate zones 1-2.