Ultramarathon

An ultramarathon is a footrace longer than the standard marathon distance of 42.195 kilometers. Events may cover a set distance or measure the ground covered within a fixed time.

Marathon: A footrace covering 42.195 kilometers, the standard marathon distance. Its fixed distance marks the threshold that an ultramarathon exceeds.
Fatigue (physical): A decline in the ability to produce physical performance during or after exertion. Progressive fatigue shapes pace and decision-making during prolonged races.
100-mile run: An ultramarathon covering 100 miles, or about 161 kilometers. It is a prominent fixed-distance format in the sport.
Yiannis Kouros: A Greek ultrarunner known for exceptional performances in road and timed ultramarathons. His records and achievements became benchmarks for modern ultrarunning.
Running injury: A musculoskeletal or other physical injury associated with running activity. High training loads and prolonged racing can expose runners to overuse injuries.
Road running: Running on paved roads, typically on routes open to pedestrians and sometimes traffic. Road ultramarathons extend this race setting beyond marathon distance.
Carbohydrate loading: A nutritional strategy that increases muscle glycogen before prolonged endurance exercise. Runners prepare energy stores for events that can last many hours.
24-hour run: An ultramarathon in which competitors cover as much distance as possible within 24 hours. It exemplifies time-based competition rather than a fixed finishing distance.
Ann Trason: An American ultrarunner who set numerous records and won major races, including Western States. Her performances helped establish women’s prominence in elite ultrarunning.
Sports nutrition: The study and practice of eating and drinking to support physical training and performance. Ultrarunning has helped make fueling during exercise a central practical concern.

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Long-distance runningBroader topic: It extends distance running beyond the conventional marathon.