noun
A sports term for a fast runner, especially in track and field. Loanword from English 'speed runner'.
from English speed runner
彼は高校時代、スピードランナーとして活躍した。
He was active as a sprinter in his high school days.
スピードランナーに必要な筋肉を鍛える。
Train the muscles needed for a sprinter.