Validation of a new equation to calculate the maximum oxygen uptake

The main regression equations to estimate the maximum oxygen uptake (V02maxl have been obtained with the total population studied [1-31. A limitation of these studies is the validity, since the prediction equations were carried out with a particular population and they were validated with themselves, because the samples did not tend to be very large. The cross validation must be used to check the accuracy of a prediction equations when they are applied to different populations. The aim of this study was to determine the validity of the maximum oxygen uptake prediction equation obtained with cross validation.