IDNLearn.com provides a user-friendly platform for finding and sharing accurate answers. Ask any question and receive comprehensive, well-informed responses from our dedicated team of experts.
Running a marathon requires being indefatigable due to physiological factors like slow-twitch muscle fibers.
Indefatigable is the word that best describes a person who runs a marathon. Marathon runners often possess a high proportion of slow-twitch muscle fibers, which provide endurance.
https://brainly.com/question/45158722