Knowledge: Walking for 1.5 hours is considered healthy and should be done daily. On the other hand, hiking for 240 minutes of round-trip is very good.

Conversation:
Hi There. I was thinking of starting hiking more. Do you have any advice?
Well, I don't really have advice, but I can tell you about hiking. It is usually performed on trails in the countryside, and it is also a long and vigorous walk.
Wow okay. How many hours should I do hiking to be considered healthy?

Response: Oh, hiking for 4 hours as round-trip is considered healthy.