The present invention provides a stamina monitoring device comprises a sensor module to sense a physiological signal, an user interface to receive a biological information, a storage to store the biological information and at least one mathematical model, a processing module to execute the at least one mathematical model to do the following: estimating an anaerobic energy and an aerobic energy based on the physiological signal and the biological information and combining the anaerobic energy and the aerobic energy into a stamina level. The present invention also provides a stamina estimation method and adjustment method for the stamina estimation method. The present invention further provides a device for estimation of stamina level.本發明提供一種體力監測裝置，包括：感測器模組，用來感受生理信號；使用者介面，用來接收生物資訊；儲存器，用來儲存生物資訊和至少一數學模型；處理模組，用來執行至少一數學模型來操作以下事項：基於生理信號和生物資訊來評估無氧能量和有氧能量；結合無氧能量和有氧能量並產生體力值。本發明根據使用者的無氧能量值和有氧能量值，也提供了一種評估體力值的方法和調整這種評估體力值方法的一種方法。本發明進一步提供了體力級別的評估裝置。
