Motorola Motoactv
Credit: Photograph by Plamen Petkov

Part personal trainer, part music player, this watch is one of the most user-friendly workout partners around, whatever your activity. The Motoactv can be worn as a watch or as an armband, and offers predefined workouts for more than 40 different activities, from cycling to rowing. Its bright screen is simple to scroll through and sorts info (heart rate, GPS data) in an easy-to-read fashion. Wireless syncing makes uploading your hard-earned data a breeze. [From $150; motoactv.com]