Ultra running is a type of long-distance running where participants race beyond the standard marathon distance of 42.195 kilometers. These events can range from 50 kilometers to several hundred kilometers, often taking place on trails, roads, or even across rugged terrain. Ultra running challenges athletes' physical and mental endurance, as it requires runners to maintain stamina over many hours or even days. The sport has gained popularity among those seeking extreme tests of personal strength, involving careful planning for nutrition, hydration, and rest to complete the long distances.

英語での「ultra running」の定義と意味

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