A triathlon, as the name suggests, is a sporting event made up of three different types of events: swimming, cycling, and running. All three of these events involve long distances and are typically done one right after the other. After each leg, competitors have to change into their gear for the next event as quickly as possible. The first triathlon took place more than 50 years ago, and today, they are regularly held around the world. Anyone considering competing in a triathlon needs to begin a rigorous training regimen and learn how to adjust their diet to get proper nutrition during training and on competition day.

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