Garmin's Forerunner 310XT is an ideal multi-sport training partner. It's water-resistant to nearly 500 feet, tracks swim, bike, and run data, as well as transition times so you can analyze your entire workout or race. Heart rate lets you target specific training zones, plus it's GPS-enabled, so you can precisely track your position and record distance, pace, and even power data from ANT+-enabled third-party power meters. Once you’ve logged the miles, your Forerunner wirelessly transfers data to your computer. Garmin's software even lets you plan workouts and upload them to the 310XT to help you take your training to the next level.