I tried to join the army but was rejected because of poor health.

我想参军，但因身体不好而碰了一鼻子灰。

《新英汉大辞典》

He was forced to retire early because of poor health.

他身体不好，只好早早退休。

youdao

He tried to join the army but was turned down because of poor health.

他想参军，但因身体不好被断然拒绝。

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

Right now, too many women are held back from reaching their full potential because of poor health reinforcing a cycle of stagnant social and economic growth.

FORBES: Philanthropy that Delivers for Women

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