Triathlon fewer injuries than those who only use running as part of their exercise routine due to the incorporation of low impact swim and bike training. Triathletes spend many hours training for competitions, like other endurance event participants. There are three components that have been researched to improve endurance sports performance; aerobic capacity, lactate threshold, and economy. Injuries that are incurred from long hours of a single activity are not as common in triathlon as they are in single sport events. The cross-training effect that athletes achieve from training for one sport by doing a second activity applies to triathlon training.
USA Triathlon annually since 1982. In 2014, the USA Triathlon Age Group National Championships in Milwaukee, Wisconsin, drew 5,700 registered participants. USA Triathlon's mission is to grow and inspire the triathlon community. USA Triathlon's vision is to provide the resources required for all in the triathlon community to reach their full potential. USA Triathlon is a member-based organization founded in 1982. At the end of 2013, USA Triathlon reached a record-high 174,787 annual members, up 5.5 percent from year-end 2012. USA Triathlon has seen steady membership growth since 1995, impacted greatly by the addition of triathlon to the Olympic Games in 2000.