It was learnt that: “self-control is a general strength that’s used across different sorts of tasks — and it could be depleted. This proved that self-regulation is not a skill to be mastered or a rote function that can be performed with little consequence. It’s like using a muscle: After exercising it, it loses its strength, gets fatigued, and becomes ineffectual, at least in the short-term.” In other words, willpower isn’t a skill at all. It is actually more like a muscle. And like other muscles in the body, willpower gets exhausted from overuse.