A motor vehicle and a method of operating same, including an on-board vehicle microcomputer having a memory, and a display connected to the microcomputer. An on-board weighing apparatus located in the vehicle is adapted to weigh a person in the vehicle and provide an input to the on-board vehicle microcomputer of the weight of the person from time to time, whereby a weight trend can be analyzed for the person and overweight or obesity condition of the person that may develop in a short period of time, if any, will be forecasted and information of such weight trends provided to a health care professional to prevent it.