Lactate combustion refers to the amount of lactate which is cleared by combustion per minute. A typical value is mmol/l/min. From a quantitative point of view, the only way to combust lactate in the working muscle is to use it as a fuel in the aerobic metabolism (mainly through the step of transforming it into pyruvate). For this reason, it becomes clear the amount of lactate which can be combusted – or the rate – depending on the aerobic metabolism. In fact, the maximal rate at which lactate can be combusted in the aerobic metabolism is limited by the actual rate of the aerobic metabolism. Even the upper limit is determined by the rate of aerobic metabolism. The effective rate of lactate combustion is also dependent on the actual lactate concentration. At low concentration of lactate, the effective combustion rate is lower then the maximum possible combustion rate. At high lactate concentration, the limit by the aerobic metabolism comes into play.