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》

The obstacle is not one of poor health.

健康状况欠佳并非绊脚石。

youdao

The manager had to step down on account of poor health.

那位经理由于身体不好，只能辞职不干。

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

To require him to pay, let's say, a third of his earnings to the government to support good causes like food and health care and housing and education for the poor, that's coercion, that's unjust.

假设，让他拿出三分之一的收入,交给政府来支持公益事业,为穷人提供食物，医疗保障，住房和教育，这就是强迫，是不公平的。

耶鲁公开课 - 公正课程节选

It's a way of showing in one number that, for example,a diabetic or an obese person died sooner but also had years of poor health.

VOA: standard.2010.08.10

After all, the hardship of poor health in old age is not guaranteed by any means.

FORBES: When It Comes To Retirement, Is Youth Wasted On The Young?

As the hearing continues into October, the general is excused appearing on grounds of poor health.

BBC: The Pinochet case: 18 months in three minutes

You decided that no child should be consigned to a life of poor health because of what neighborhood his or her family lives in.

WHITEHOUSE: Making Healthy Food Accessible & Affordable