I work out regularly to keep fit.

我经常做运动以保持健康。

《牛津词典》

She tries to keep fit by jogging every day.

她每天慢跑以保持健康。

《牛津词典》

Try to keep fit and healthy by exercising every day.

试着通过每天锻炼来保持健康。

youdao

Can you give us some advice on how to keep fit?

你能给我们提点保持健康的建议吗？

健康生活 - SpeakingMax英语口语达人

If you just drag them and drag them, and drag them in there, it will keep growing to fill--to fit any such statements.

拖拽填充板块进来,它将越变越大。

哈佛公开课 - 计算机科学课程节选

Just as running to keep fit was once considered bizarre, maybe mud running will one day seem prosaic.

BBC: From marathons to mud running

He told CNN that having a gym open all day in the heart of the office is a huge incentive to keep fit.

CNN: Boosting employee wellbeing

It's perhaps a desire to emulate the likes of Bordeaux -- as well as a desire to keep fit -- that motivates young Senegalese men to work out on the beaches of Dakar.

CNN: Fighting talk: Why wrestling is booming in Senegal