Can waterproof MP3 players help motivate you? AllThingsD's Lauren Goode tests two pool-friendly music players, the Finis Neptune and the Underwater Audio iPod. Swimming laps can be pretty boring.

Taking your tunes into the watery depths, the Sony NWZ-W273 waterproof MP3 player is decent enough on land but does it pass the swin test? For runners, riders and gym lovers whipping a phone or ...