Triathlon is an endurance sport consisting of back-to-back swimming, cycling, and running. There are four popular distances: sprint (.75k m swim, 20km bike, 5km run), Olympic (1.5km swim, 40km bike, 10km run), half-ironman (1.9km swim, 90km bike, 21.1km run), and ironman (3.8km swim, 180km bike, 42.2km run). Even at the...