The King of Another World Has a Chat Group

I read half of it in one sitting. Come on, the author is good-looking. That is, can the author's physique and exercises be integrated into one exercise? I don't think the protagonist has much use for his martial arts or anything like that. Most of it has been fist punches and stuff like that. Those techniques are useless. Isn't it good to merge it into one exercise? And physical fitness.

It wasn't very good at the beginning, but it got better later on.