With INSCYD, you can either enter a measured VO2max value from a field or lab test, or alternatively, let the software determine it for you from other tests conducted at sub-maximum conditions. The determination of VO2max in INSCYD is not based on accidental correlation of metrics that aren’t really linked to oxygen uptake (like some devices do by estimating VO2 from heart-rate variability). INSCYD is able to calculate the VO2max in a very simple, but scientifically-proven way: from a tests performed at sub-max conditions, for example, INSCYD calculates the aerobic demand of energy by deducting it from the anaerobic demand that has been calculated in the test.