This is the minimum speed for which the organism's maximal oxygen uptake (VO2 max) is reached, after a few minutes of constantly maintaining this exercise intensity.
[citation needed] While a sophisticated lab may be required to obtain precise measures of vV̇O2max, it can be estimated using a simple field test on a 400 m running track.
In a 2015 study[1] of 28 male rugby players, the authors measured vV̇O2max and then had the subjects perform short time trials (TT) of various distances on the track.
For a better estimate, several time trials at distances varying from 1200–2200 m could be run, with adequate rest between them (e.g. 48 h in Bellenger et al.[1]).
Note: This formula is identical to that used to calculate the metabolic equivalent of task (MET) score for a given V̇O2max estimation.