Share 'Powerplant for the legs'

My idea is to create small power devices that can be adjusted at the lower leg of a person. Similar to a mechanical clock that can be "charged" through shaking it, these devices include a magnet that moves relative to a wire spool as soon as triggered by the movement of the legs. Through this movement of the magnet, induction-electricity is created. This energy can be used to e.g. charge the batt…