His poor health incapacitated him for work (from working).

他因健康原因而不能工作。

《新英汉大辞典》

His pale face suggests his poor health.

他苍白的脸色表明了他的健康欠佳。

youdao

His poor health was disadvantage to him.

他身体不好是他的不利条件。

youdao

The artist who created Charlie Brown and his dog Snoopy had retired a month earlier because of poor health.

VOA: special.2009.10.25

Jacob Riis's concern for the poor kept him so busy writing and speaking around the country that he ruined his health.

VOA: special.2010.08.01

His health was poor. And he had trouble getting money.

VOA: special.2009.07.09

Authorities took responsibility and custody of the child in view of his poor health conditions when he was admitted to a hospital.

CENTERFORSECURITYPOLICY: Colombia's Uribe unmasks the FARC

It is not the first time in recent years that the 86-year-old leader has been in the news because of his poor health.

BBC: Veteran Indian Marxist taken ill

Raedemaeker was initially held in Gansu but was later allowed to live with his partner in a Beijing hotel because of his poor health, media reports say.

BBC: Belgian art dealer convicted of smuggling in China dies