There were no fatties among successful cultivators. This was an iron-clad rule.
Other than those special cultivation arts that would cause one to become fat, one could say that there were no fatties among cultivators.
Because cultivation was a process of unceasingly surpassing one's own limits.
In the Middle-Earth Nine Provinces, the lifespan of an ordinary man was 50 years old. If they were lucky, they could live a complete sexagenary cycle of 60 years. As for those in the Longevity Realm, they had at least several hundred years of life.
In this world, who didn't want eternal life?
But how could gaining eternal life be easy?
Leaving aside the Legendary Realm, if one wanted to enter the Longevity Realm, they had to cultivate extremely assiduously.
If you cultivated for a long period, it was very difficult even if you wanted to be fat.