You have been eating like Michael Phelps for years, but now it's time to start actually working off some of those calories in the pool. Rather than listening to the sounds of your own splashing, the XtreaMP3 lets you bring your own music into the pool or any other body of water near you that isn't frozen solid. It's completely waterproof up to 15-feet and holds 1 GB of music. The player straps around your arm and can stand up to even the most extreme water sports. It has a built-in rechargeable battery that will give you about 8-hours of juice per charge and the controls are easy to navigate without looking so you can change the track in a hurry in case the Jaws theme song comes on and you get really scared. $149.