Serious triathletes may be the most tech-savvy of all athletes and have the latest devices to provide data for improving performance, but putting it all together can still be a daunting and confusing task. Triathlon 2.0 examines the sport s most popular devices, including cycling power meters, GPS trackers and heart rate monitors allowing athletes to capture the most accurate readings, learn what they mean and, just as importantly, what they don t.