<Dd> V O 2 max ≈ HR max HR rest × 15.3 mL / (kg minute). (\ displaystyle (\ text (V)) (\ ce (O2)) (\ text (max)) \ approx (\ frac ((\ text (HR)) _ (\ text (max))) ((\ text (HR)) _ (\ text (rest)))) \ times 15.3 (\ text (mL)) / ((\ text (kg minute))).) </Dd> <P> This equation uses the ratio of maximum heart rate (HR) to resting heart rate (HR) to predict VO max . The researchers cautioned that the conversion rule was based on measurements on well - trained men aged 21 to 51 only, and may not be reliable when applied to other sub-groups . They also advised that the formula is most reliable when based on actual measurement of maximum heart rate, rather than an age - related estimate . </P> <P> Kenneth H. Cooper conducted a study for the United States Air Force in the late 1960s . One of the results of this was the Cooper test in which the distance covered running in 12 minutes is measured . Based on the measured distance, an estimate of VO max (in mL / (kg min)) is: </P> <Dl> <Dd> V O 2 m a x ≈ d 12 − 504.9 44.73 (\ displaystyle \ mathrm (VO_ (2) \; max) \ approx (d_ (12) - 504.9 \ over 44.73)) </Dd> </Dl>

What is the unit of measurement for vo2max