A shoe includes a sole, an actuator and a transducer. The actuator is mounted on one side of the sole. The transducer is mounted within the sole and includes a micro-motor, a link structure and a heater. The link structure is positioned between the micro-motor and the actuator and configured to move the micro-motor to generate electric energy. The heater is electrically coupled to the micro-motor and configured to convert the electric energy provided by the micro-motor to heat. When the actuator deforms or restores its deformation, the link structure moves thereby enabling the micro-motor to generate electric energy for the heater.