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

Currently working as a lumber stacker at a lumber mill. 10 hour days with one 10 minute break in the morning and a 1/2 hour lunch. At 54, I am losing grip due to over use without adequate recovery time. Been at this for just over 60 days. I’m not sure how much longer I can continue this line of work.