This compact, lightweight runner’s wristwatch packs music, heart-rate tracking, GPS data, and old-school stopwatch functionality. Not only does it sync with Bluetooth headphones, but it also keeps track of the tunes that make you run fast. Pro: The interface is easy to use, and the watch syncs with any android device. Cons: Battery life is short.
Looking for the elusive do-it-all work-out gadget? The shockproof and water-resistant Motoactv can be worn when running, hiking, or biking, and plays music with its smart MP3 player, monitors your heart rate, and tracks your route via GPS.