How does constant exercise strengthen instead of wearing down the body?

Question

The more miles you drive a car, the more prone it is to breaking down or having mechanical issues. I’m struggling to see how constant exercise like daily 5 mile runs doesn’t add “wear and tear” to the body.

In: 7

Answer 1

Your body can adapt to injury.
For a small cut, it heals up as if nothing happens. For a larger cut, it’ll scar up and be harder to cut in that area.