A user physiological condition sensing apparatus constituted of: a thermal sensor, the thermal sensor arranged to be positioned on the neck of the user and sense the skin temperature of the user a core temperature functionality in communication with the thermal sensor, the core temperature functionality arranged to determine the core temperature of the user responsive to the sensed skin temperature and an output module in communication with the core temperature functionality, the output module arranged to output the determined user core temperature, wherein the core temperature determination is further responsive to the weight and height of the user.
