long-distance runner
Refers to a person who runs long-distance races, such as marathons or track events.
He was active as a long-distance runner in high school.
Refers to a short-distance runner (sprinter), as opposed to a long-distance runner.
Refers to a middle-distance runner, covering distances between sprints and long-distance events.
Compound of 長距離 (long distance) + 走者 (runner).