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.