The heart rate method for estimating oxygen uptake: analyses of reproducibility using a range of heart rates from commuter walking

Background The heart rate method, based on the linear relation between heart rate and oxygen uptake, is potentially valuable to monitor intensity levels of physical activities. However, this depends not least on its reproducibility under standard conditions. This study aims, therefore, to evaluate the reproducibility of the heart rate method in the laboratory using a range of heart rates associated with walking commuting. Methods On two...