Abstract: A garment is made of flexible material that includes a first measurement electrode integrated into the garment at a first location, a second measurement electrode integrated into the garment at a second location different from the first location, and a measurement circuitry configured to measure bioimpedance by using the first measurement electrode and the second electrode and to transmit the measured bioimpedance and to measure electrocardiogram by using at least one of the first measurement electrode and the second electrode or another electrode. The garment is an upper body garment, in which the first measurement electrode is disposed above a heart level and the second measurement electrode is disposed below the heart level.

Abstract: There is provided a wearable device for measuring cardiac activity of a user, the wearable device comprising: an optical cardiac activity sensor unit configured to be placed in contact with a measurement area and to enable cardiac activity measurement of the user to obtain a cardiac activity signal; a plurality of electrodes configured to enable bioimpedance measurement on the measurement area to obtain a bioimpedance signal; a detector unit for detecting changes in the bioimpedance signal; and a reducer unit for reducing a motion artefact effect on the cardiac activity signal based on the detected changes in the bioimpedance signal.

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 garment is made of flexible material that includes a first measurement electrode integrated into the garment at a first location, a second measurement electrode integrated into the garment at a second location different from the first location, and a measurement circuitry configured to measure bioimpedance by using the first measurement electrode and the second electrode and to transmit the measured bioimpedance and to measure electrocardiogram by using at least one of the first measurement electrode and the second electrode or another electrode. The garment is an upper body garment, in which the first measurement electrode is disposed above a heart level and the second measurement electrode is disposed below the heart level.

Abstract: There is provided a wearable device for measuring cardiac activity of a user, the wearable device comprising: an optical cardiac activity sensor unit configured to be placed in contact with a measurement area and to enable cardiac activity measurement of the user to obtain a cardiac activity signal; a plurality of electrodes configured to enable bioimpedance measurement on the measurement area to obtain a bioimpedance signal; a detector unit for detecting changes in the bioimpedance signal; and a reducer unit for reducing a motion artefact effect on the cardiac activity signal based on the detected changes in the bioimpedance signal. (FIG.