The current invention pertains to an apparatus and method for the deter-mination of excess post-exercise oxygen consumption (EPOC) and the estimation of blood lactate levels. While these exercise parameters are traditionally determined us-ing indirect calorimetry and blood sampling, this invention provides a method for the determination of these parameters using heart rate data. A wearable photoplethys-mography device for measuring heart rate is included as an exemplary embodiment, however, the method of the current inventions can also be used with heart rate data from any heart rate monitor. In an embodiment of the present invention a supply-demand differential equation is used to continuously monitor EPOC in real-time. Furthermore, blood lactate levels can also be estimated as a function of EPOC. Im-portantly, the process of determining EPOC and blood lactate can be linked to a biomathematical model of human physiology to access additional parameters such as hormonal changes, body composition changes or other physiological fluctuations or transient physiological behavior.本發明係關於一種用於測定運動後過量氧耗(EPOC)及估算血乳酸鹽水平之裝置及方法。雖然傳統上使用間接量熱法及抽血測定此等運動參數，但本發明提供一種使用心率資料測定此等參數之方法。一示例性實施例包含一種用於測量心率的穿戴式光體積描記術器件，然而，本發明方法亦可與來自任何心率監測器之心率資料一起使用。在本發明之一實施例中，使用供需微分方程以即時連續地監測EPOC。此外，亦可以EPOC之函數形式估算血乳酸鹽水平。重要地，該測定EPOC及血乳酸鹽之方法可關聯至人類生理學之生物數學模型以獲得諸如激素變化、身體組成變化或其他生理波動或暫態生理行為之額外參數。
