The standard metaphor is “willpower is like a muscle”. This implies that by regularly exercising it, you can strengthen it, but also that if you use it too much in the short term, it can get tired quickly. So yes and yes.
The standard metaphor is “willpower is like a muscle”. This implies that by regularly exercising it, you can strengthen it, but also that if you use it too much in the short term, it can get tired quickly. So yes and yes.