Does anyone exercise without an assistant anymore? We’re not referring to that overpriced trainer. We mean the MP3 player. Ubiquitous wherever people are sweating. Except the pool. Too bad, because you love the payoff of a good swim: toned muscles, non-stressed joints, smooth skin. You just hate the tedium. (If only Zero 7 and DJ Vadim performed poolside …) The gadget of your wet dreams (nyuk nyuk) already has its toes in the water: SwiMP3. So how can a non-dolphin like you hear underwater? The player rests on the back of your head and ear-covering sound flaps rest on your cheekbones, all of which is held in place by the connected goggles. SwiMP3 holds about 30 songs and (although the manufacturer states otherwise) is so far only PC-compatible. Super-easy plug-and-play. It works best when your head is fully submerged, so kick out that crawl. Do the backstroke. And rock on, little fishie. Available online at waterproofmusic.com.