Abstract: There is provided electronic device, comprising: a receiving unit configured to receive heart rate data generated by a heart rate measuring system; a calculation unit configured to calculate heart rate variation data on the basis of the received heart rate data. The electronic device further comprises: a processing unit configured to analyse the calculated heart rate variation data in comparison with the corresponding heart rate data, and to determine at least one threshold value for fat burning on the basis of the analysis.

Abstract: There is provided an electronic device comprising: a processing unit configured to receive skin temperature data generated by a measuring unit, to receive performance data from a measuring unit, and to determine a theoretical fluid loss value on the basis of the received performance data. The electronic device further comprises: a processing unit configured to determine a relation between a predetermined perspiration threshold and a skin temperature value deduced from the received skin temperature data; and to determine a real fluid loss value on the basis of the theoretical fluid loss value and the determined relation between the predetermined perspiration threshold and the skin temperature value.

Abstract: A portable electronic device comprises illuminating unit (300) configured to illuminate extrapupillarily the skin covering a user's eye cavity with optical radiation, thus resulting in diffuse propagation of optical radiation energy to an optically sensitive tissue of the user's eye, and adapting unit (500, 510, 520, 530, 550, 560) for adapting the illuminating unit (300) to the user's head.

Abstract: The invention relates to a method and device for weight management of humans. First, the user's initial weight and his target weight are received via a user interface of the device, then food intake amount and exercise instructions to be presented via the user interface of the device are generated on the basis of the difference between the user's initial weight and his target weight. In addition, the user's energy expenditure is generated with the device and the user's food intake amount is received via the user interface of the device. Further, the user's current weight is received via the user interface and a change in the user's weight is generated with the device. Further still, the food intake amount and/or exercise instructions to be presented via the user interface of the device are modified with the device on the basis of the change in the user's weight.

Abstract: The invention relates to a method, a user-specific performance monitor and a computer program for determining the user's performance. In the method, the performance power of a physical exercise is determined by means of user movement data registered by the user-specific performance monitor. Further, the exertion level corresponding to the performance power of the physical exercise is determined by means of physiological information measured from the user, the physiological information being registered by the user-specific performance monitor; and the user's performance is estimated by means of the performance power of the physical exercise and the exertion level corresponding to the performance power of the physical exercise.

Abstract: The invention relates to a method and device for weight management of humans. First, the user's initial weight and his target weight are received via a user interface of the device, then food intake amount and exercise instructions to be presented via the user interface of the device are generated on the basis of the difference between the user's initial weight and his target weight. In addition, the user's energy expenditure is generated with the device and the user's food intake amount is received via the user interface of the device. Further, the user's current weight is received via the user interface and a change in the user's weight is generated with the device. Further still, the food intake amount and/or exercise instructions to be presented via the user interface of the device are modified with the device on the basis of the change in the user's weight.