Why is physically exerting yourself to the point of exhaustion at the gym good for you but various jobs involving manual labor seem to cause permanent damage in the long term?

Question

Why is physically exerting yourself to the point of exhaustion at the gym good for you but various jobs involving manual labor seem to cause permanent damage in the long term?

In: Biology

Answer 1

According to Lifehacker physical exhaustion not required for a workout

https://vitals.lifehacker.com/exercise-shouldnt-feel-horrible-1844763622