"Maintain my physical health" 是保持我身体健康的英文表达方式。

来源：Maintain 这个词是由拉丁语"manutenere"演变而来的，意思是维持、维护。Physical 来自于希腊语“physikos”，意思是身体的。Health 来自于古英语“haelth” ，意思是健康。

例句及其中文翻译：

I need to maintain my physical health by exercising regularly.
(我需要经常锻炼来维持我的身体健康。)
It's important to maintain your physical health if you want to pve a long and healthy pfe.
（如果你想活得长久健康，维持你的身体健康是很重要的。）
He tries his best to maintain his physical health by eating healthy food and exercising regularly.
（他尽力通过吃健康食物和经常锻炼来维护他的身体健康。）