Age groupers are the amateur athletes at any given triathlon—a.k.a. the non-pros. They are generally organized into divisions broken out by age and gender (men, 40-44, for example). Age groupers are separated to promote fair competition between similar athletes, and oftentimes these divisions can become extremely competitive. In IRONMAN races, winning your age group generally guarantees you a coveted slot at the IRONMAN World Championship in Kailua-Kona, Hawaii.