An exercise device includes a frame and an exercise deck. The exercise deck includes a platform, a first pulley connected to a front portion of the platform, a second pulley connected to a rear portion of the platform, and a tread belt surrounding the first pulley and the second pulley. The exercise device also includes a motor in mechanical communication with at least one of the first pulley and the second pulley to drive the tread belt and an energy efficiency indicator that actives in response to determining that a power load needed to operate the exercise device is below a predetermined energy efficient threshold during a performance of an exercise.