If you want to become and advanced runner you want to keep track of your performances whether you run outdoors or indoors, professionally or just for fun. Running watches were made to help you monitor your athletic performances and improve them. A GPS watch for running unite computerized information with GPS monitoring. You can compare the data about your heart rate, your pace , speed and distance with the route on a map after the training session. A quality GPS watch for runners must : precisely track distance, pace & calories and display this on an easy-to-read screen; include wireless technology automatically transfers workout data to and from computer. Also a good sport watch will have this features altimeter, barometer, digital compass, chronograph mode, temperature display. The top brands are: Garmin, Timex, Magellan and Casio.