It is recommended to unplug the socket and cut off the power supply when not in use. Any electrical appliance that is energized for a long time has its shortcomings. If the socket is loose or accidentally hit hard, it may leak electricity or produce electric sparks, which may lead to fire accidents. Some treadmills have been used for a long time, and the circuit will age, which will lead to the tripping of the circuit at home and fire. Besides, electricity has been wasted.