Abstract: A computer-implemented method for providing training guidance in connection with a physical exercise includes: measuring, by using a heart activity sensor, heart activity of a user during a physical exercise; measuring, by using a bioimpedance measurement sensor, bioimpedance of the user during the physical exercise; computing, by a processing circuitry, a stroke volume from the bioimpedance synchronized to a cardiac cycle of the user by using the measured heart activity; computing, by the processing circuitry, training intensity by using at least the computed the stroke volume; comparing, by the processing circuitry, the training intensity with at least one threshold; and outputting at least one training guidance instruction on the basis of the comparison.

Abstract: A method of estimating a stress level of a human by an apparatus using heart activity measurement data includes: executing a breathing exercise application by the apparatus, starting a breathing exercise of the breathing exercise application and outputting, during the breathing exercise, breathing instructions to a user of the apparatus; acquiring a set of heart activity measurement data samples measured by a heart activity sensor from the user during the breathing exercise; computing a set of inter-heartbeat interval samples of the set of heart activity measurement data samples; computing a cardiac coherence of the user during the exercise from the set of inter-heartbeat interval samples; measuring a respiratory rate of the user during the breathing exercise; computing a score of the breathing exercise on the basis of the respiratory rate and the cardiac coherence, the score indicating a stress level of the user; and outputting the score through an interface of the apparatus.

Abstract: Discloses are method and device determining threshold values for the volume and intensity of physical activity and the lowest levels of this activity that reduce risk factors in overweight persons who suffer from disorders of sugar and lipid metabolism. The method comprises of registering a person's daily physical activity, comparing it with the measured/predetermined threshold levels and informs the person, if the volume and/or intensity of the physical activity has been sufficient to prevent the effects of disease risk factors. Based on the disclosed methodology, overweight persons having disorders in sugar and lipid metabolism are able to perform physical activity maintaining health and reducing the risk factors. The invention described herein demonstrates a novel opportunity for overweight people having an abnormal blood sugar to use the low intensity physical activity to restrain risk factors related to cardiovascular diseases, diabetes and obesity.