Abstract: Method and system for measuring the activity of the functions of the body of a person, wherein the vital functions are measured wirelessly with a portable activity measuring apparatus. For measuring an activity a sensor or sensors, e.g. activity sensors, blood pressure sensors, ECG sensors or heart pulse sensors, that are fixable to the body arc used, from which sensor or sensors a measured value or measured values are received, e.g. activity values, blood pressure values, ECG curves or heart pulse values. The aforementioned value or aforementioned values are sent wirelessly to the server of the measuring of an activity for processing, monitoring, analysis and/or other actions. The server analyzes the measured values, converts the processed measurement results into a suitable format for sending onwards, and sends the converted measurement results to the user/users.