"To recover one's physical health" is a common way to say "身体恢复健康" in Engpsh.
Here are some example sentences:
After a long period of illness, she was finally able to recover her physical health.
(经过长时间的疾病，她终于能够恢复身体健康了。)
Regular exercise and a balanced diet are key factors in helping people recover their physical health.
(定期锻炼和平衡的饮食是帮助人们恢复身体健康的关键因素。)
The doctor advised him to take a long break and focus on recovering his physical health.
(医生建议他休息很长一段时间，专注于恢复身体健康。)