In the past trying to exercise with your MP3 player could be a little difficult for a number of reasons. Perspiration and water could get in and damage the player, the shaking that occurs from exercising occasionally made your player skip, not to mention the player's weight was too heavy to use without it affecting your performance. Sony solved all these problems with their NW-S203F 1GB S2 Sports Walkman MP3 Player designed specifically for those who want to use their MP3 player as a workout accessory.
The NW-S203F's body is a seamless, water-resistant aluminum body, so perspiration and water splashes won't send your Walkman to MP3 heaven. Sony took the shaking problem that plagued other players and turned into one of their highlight features. In order to access the shuffle function on your Walkman simply shake the NW-S203F 3 times, to turn shuffle off shake the player 3 times once more.
The NW-S203F also serves as your personal trainer, keeping track of distance traveled and calories burned. A stopwatch is included so you can keep track of how fast you are going, and if you get tired of listening to your music collection you can always use the FM tuner, for a change of pace . The NW-S203F allows you to sort your music playlists based on tempo, and then your Walkman, using the automatic selection function, will change the playlists automatically based on your pace of movement.