For people who love music as much as they enjoy working out, Sony's new Walkman Sports MP3 Player may be just the thing to keep up with their active lifestyles. The device features 4GB of storage and a one-piece, compact build that shouldn't cause too much of a hassle for runners and swimmers alike, especially since Sony claims that this particular Walkman has a waterproof design. Best of all, the MP3 player features Sony's quick charge function, which will replenish the battery in just 3 minutes for at least an hour of playback. The Walkman Sports MP3 Player will be available in black, blue, white, and pink when it is released this March for $99.99.