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

Exercise is a vaccine for your muscles..all of them including the really important ones like your heart.

A vaccine tricks your body into thinking the real virus is attacking, and beefs up your immune system. Exercise does the same thing with your musculoskeletal system.

If you get too much of the real thing (for example if you suddenly have to run 5 mi) you can hurt yourself. So it’s best to taper it and build up gradually.