A method of controlling a vehicle is provided. The method may include steps of: acquiring occupant pulse rate information and occupant motion information for an occupant of the vehicle； classifying, using the occupant motion information, a current activity level of the occupant into one of a plurality of predetermined activity levels； determining a range of safe pulse rates for the occupant at the current activity level； determining, using the range of safe pulse rates for the occupant, if a current pulse rate of the occupant indicates a cardiac health risk to the occupant； and, responsive to a determination that the current pulse rate of the occupant indicates a cardiac health risk to the occupant, controlling the vehicle.
