> Do you need a study for every little thing?
I didn't say that. What I said:
> What "good for you" would look like to me would be longer life expectancy, better health outcomes at different stages of life, etc. "Strong feet," for example, doesn't meet that standard for me. I'd want to see a link that work to actively strengthen one's feet creates those better life outcomes.
"It feels good" isn't an objective outcome that necessarily means something is "good for you."
> And you can also objectivly meassure. (E.g. how long you walk without pain)
This is a better outcome but I'd say it's not objective because I walk without pain while wearing shoes.