Abstract: The invention pertains to a portable device comprising a housing, a display, a storage medium, at least one acceleration sensor, means for calculating an activity parameter based on the signal generated by the acceleration sensor, storing the calculated parameter in the storage medium, and showing the same in the display. The said parameter is the Physical Activity Index (PAI) or a derivative thereof.
Abstract: The invention pertains to a portable device comprising a housing, a display, a storage medium, at least one acceleration sensor, means for calculating an activity parameter based on the signal generated by the acceleration sensor, storing the calculated parameter in the storage medium, and showing the same in the display. The said parameter is the Physical Activity Index (PAI) or a derivative thereof.