Marathon Running

Status: public · Confidence: low (0.89) · Basis: verified_sources

## TL;DR

Marathon running is a 42.195-kilometer endurance event with performance shaped by race distance, fueling, and aerobic preparation. This repair keeps claims tightly sourced.

## Core Explanation

The previous entry had too many broad running claims for its evidence. The repaired version uses direct marathon, nutrition, and exercise-guideline sources.

## Further Reading

- [Marathon race](https://www.britannica.com/sports/marathon-race)
- [Nutrition and Athletic Performance](https://doi.org/10.1249/MSS.0000000000000852)
- [Marathon Records](https://worldathletics.org/records/by-discipline/road-running/marathon/outdoor/men)