noun
General term for a person who competes in sports; neutral and widely understood.
彼はプロの運動選手です。
He is a professional athlete.
運動選手は毎日厳しいトレーニングをする。
Athletes do rigorous training every day.
Compound of 運動 (うんどう, 'exercise, motion') and 選手 (せんしゅ, 'player, competitor').