The physical state of people working in dangerous environment or ill ones is important to be monitored and analyzed. For such an investigation a typical parameter is the heartbeat rhythm, the ECG, the saturation of oxygen and breathing. Defining the body mobility state as well as its position may be also of the same importance. In order to achieve this microprocessor data storage device is used, which stores the 3D velocity sensor signal. The momentary velocity, acceleration and position can be defined from these accumulated data. By the help of co-relation calculus, from a sample database an approach of the character of mobility can be determined.