A duathlon is a multi-sport race that typically involves a run–bike–run format. It’s similar to a triathlon but without the swim. Distances vary, from sprint to long-course formats, and the event tests both aerobic endurance and muscular strength. Transitions play a crucial role in race efficiency. Duathlons are popular for athletes who prefer not to swim or want to stay race-ready year-round without access to pools or open water.
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