Triathletes need a watch that's waterproof for the swim plus has tracking capabilities for the bike and run. There are only a handful of current models that fit that bill, said Ray Maker, founder of popular endurance blog DCrainmaker.com. Garmin's Foreunner 310XT is one of the best. Its features track time, pace, distance, heart rate, and speed for each of the three triathlon legs. A Garmin GPS chip offers real-time stats for training or during a race, and the device stores data in multiple sports modes so you can upload wirelessly to a computer at home and then get geeky analyzing your splits.
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