1. A system for providing physical activity instruction to a user, comprising: a video camera transmitting a real-time video signal of a user performing a physical activity; a processor for receiving the real-time video signal; a signal mixer generating a mixed video signal, the mixed video signal comprising the real-time video signal combined with a video of an ideal performance of the physical activity; a base portion receiving the mixed video signal and splitting the signal into a left eye signal and a right eye signal; and a head mounted display displaying the left eye signal and the right eye signal on transparent lenses provided for a left eye and a right eye of the user which allow the user to maintain the user's natural and unobstructed field of view.