A record 517,150 triathletes finished a race in 2013 and the number of participants doesn't look like it will wane this year. "There are lots of reasons why," says Walter DeNino, a former member of the U.S. Triathlon Team and president of Trismarter.com, a triathlon coaching service. "But I think it's mainly because it's the perfect form of cross-training. You're working lots of different body parts and always switching up your training, so triathletes rarely get hurt.
Plus, what guy doesn't want to have a triathlete's body?" Even some of Hollywood's leading men, such as Matthew McConaughey have completed the swim-bike-run trifecta, and, thanks to the program that follows, you can, too. We employed DeNino to tell you how many miles to log and hours to train, and we asked two-time Ironman world champion Tim DeBoom and Olympian Matt Reed to share their secrets to winning. By the end of 12 weeks of training, you'll look better, feel fitter, and maybe even wind up with some hardware around your neck.