Emma Jane Pooley is a British-Swiss athlete in multiple sports. A former professional cyclist who specialised in time trials and hilly races, she later transferred to endurance running, duathlon and triathlon, and was four-times world champion in long-distance duathlon. She competes in long-distance and uphill mountain running and has represented Switzerland at the world trailrunning championships.

Duathlon is an athletic event that consists of a running leg, followed by a cycling leg and then another running leg in a format similar to triathlons. The International Triathlon Union governs the sport internationally.