They are doing recreational activities not total sports like basketball or volleyball. So they are just a bit above than normal in terms of being athletic. Granted they don't get exhausted as fast as normal people, they are still having exercise worked on their body afterall. Unless they do constant workout like lifting and running everyday, then they would be more athleticSometimes I'm even afraid to imagine how athletic the characters in Yuru Camp or Yama no Susume have become after all that sports recreation. Of course, the mountains in my region are not Japan, but even here, active cycling in the mountains will make your body quite developed.
It really is amazing, you really gotta experience it yourself one day, taking hot bath in freezing cold weatherThis manga always show onsen as some kind of amazing place. I want to try going in
Damn, these girls are like me frfrLost all motivation, energy and drive and give up after taking a relaxing hot bath.