A new submaximal cycle ergometer test for prediction of VO2max

Maximal oxygen uptake (VO_2max) is an important, independent predictor of cardiovascular health and mortality. Despite this, it is rarely measured in clinical practice. The aim of this study was to create and evaluate a submaximal cycle ergometry test based on change in heart rate (HR) between a lower standard work rate and an individually chosen higher work rate. In a mixed population (n = 143) with regard to sex (55% women), age (21–65 years), and activity status (inactive to highly active), a model included change in HR per unit change in power, sex, and age for the best estimate of VO_2max. The association between estimated and observed VO_2max for the mixed sample was r = 0.91, standard error of estimate = 0.302 L/min, and mean measured VO_2max = 3.23 L/min. The corresponding coefficient of variation was 9.3%, a significantly improved precision compared with one of the most commonly used submaximal exercise tests, the Åstrand test, which in the present study was estimated to be 18.1%. Test–retest reliability analysis over 1 week revealed no mean difference in the estimated VO_2max (?0.02 L/min, 95% confidence interval: ?0.07–0.03). The new test is low‐risk, easily administered, and valid for a wide capacity range, and is therefore suitable in situations as health evaluations in the general population.