I have heard that willpower is finite and every person starts their day with a limited capacity.
On the other hand there are people like gym goers or sportspersons saying that they can muster up more will power if they have the right mentality at the right time.
I don’t know which one is right, but is it possible to increase one’s capacity for will power ? If so what kind of exercises or training methods do they have to use ?
There’s a very good video/podcast episode by Andrew Huberman called something like “How to improve tenacity and willpower”, and it discusses the idea of willpower being a finite resource. The gist of it is that it is finite if you believe it’s finite, and can be partially recovered by costuming glucose if you believe glucose is that finite resource.
As for whether or not you can train it, yes you can. The same brain region is responsible for this willpower regardless of what the task is, so if you get practice drawing on this willpower in one part of your life, it will improve your ability in other aspects.