Abstract: A treadmill includes a treadbelt disposed in a deck, a motor coupled to drive the treadbelt, an incline controller to selectively adjust the deck to different inclinations, a driver coupled to a microprocessor unit and the motor and the incline controller, to control the motor and the incline controller to adjust the treadbelt to different driving speeds and to adjust the deck to different inclinations. A sensor is coupled to the microprocessor unit, to detect rotational speed of the treadbelt. The driver actuates the motor to increase or to decrease the driving speed of the treadbelt when detected driving speed of the treadbelt is greater or lower than the predetermined average speed of the treadbelt.