Patent ID: 8292820

Claim:
A method for monitoring a person's physical exercise during the exercise, the method comprising: collecting a hemodynamic signal using a sensor, transmitting the hemodynamic signal to a data-processing unit, and deriving at least one physiological parameter from the signal by using the data-processing unit, wherein the sensor and the data-processing unit are located in a portable device worn on a wrist of the person, and wherein the at least one physiological parameter derived from the hemodynamic signal is a respiratory frequency, the method further comprising: detecting a frequency of a respiration modulation from the hemodynamic signal in order to determine the respiratory frequency, the frequency of a respiration modulation being detected using a low-pass filter to yield a filtered signal, and by investigating a period of the filtered signal in a manner independent of a heart-rate modulation, and calculating at least one training-effect parameter, dependent on the person and the exercise, based on the determined respiratory frequency.