Health Elevation
Ego Depletion
your willpower might run on a battery that drains all day — or that might be a story your tired brain tells to let itself off the hook.
Grounded in the research on ego depletion
the experiment
Roy Baumeister's team (1998) sat hungry people next to warm cookies and made some of them eat radishes instead. The cookie-resisters quit a later unsolvable puzzle way sooner — about 8 minutes vs 21. The read: resisting temptation spent something, and there was less left for the next fight.
the tank model
The idea that self-control is one shared fuel tank. Saying no to the fridge, biting your tongue in an argument, grinding homework — all drink from the same reserve. Run it low and your next decision gets sloppy. it's why your 11pm self orders the food your 9am self swore off.