Generating electricity from arm movement wouldn’t be very practical, but there are motorized battery-powered shoes now. (They needed good batteries + microcontrollers + accelerometers + etc to be usable at all, so they only appeared recently.)
Generating electricity from arm movement wouldn’t be very practical, but there are motorized battery-powered shoes now. (They needed good batteries + microcontrollers + accelerometers + etc to be usable at all, so they only appeared recently.)