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 programs. On the elite level, USA Triathlon is responsible for the selection and training of teams to represent the United States in international competition, including the world championships, Pan American Games and Olympic Games and Paralympic Games. It conducts national camps and clinics and provides coaching education programs. On the developmental level, USA Triathlon fosters grassroots expansion of the sport, which is facilitated by the sanctioning of age-group events and triathlon clubs. National Championship events are held for athletes of all ages, including youth and junior athletes. USA Triathlon's marquee event each year is its Age Group National Championships, held