谁擅长跑步用英语怎么说

To say "who is good at running" in English, you can say "Who excels in running?"
The origin of the phrase "excels in" can be traced back to the Latin word "excellere" which means "to rise above, surpass or be superior to".
Example sentences:
She excels in running marathons and has won several awards for her achievements.
(她擅长跑马拉松，因她的成就获得了几个奖项。)
He excels in running and is a top competitor in his local running club.
(他擅长跑步，是他当地跑步俱乐部的顶尖竞争对手。)
Note: The phrase "excels in" is a formal way of saying "is good at". Other informal or casual ways to express the same meaning are "is skilled at", "is talented at" or "is an expert at".