The present invention relates to a stress-measuring system for determining a level of stress of a user, in particular for monitoring an upcoming burnout, the system (10) comprising an alarm clock (12) for initiating an alarm at an arbitrary preset time, wherein the system(10) comprises an interface (14) for switching off the alarm; a vital sign sensor (16) for measuring a first vital sign of the user while the user operates the interface (14); and a processing unit (18) for determining the level of stress of the user based on the sensed first vital sign.