Whereas if you hit the work of the day fresh, you're generating the adrenaline drink from all that stuff. This is when people feel a bit more anxious. They feel a bit more irritable, they feel a bit more tired. So this whole concept of exercise gives you energy. That's how it gives you energy. It's not caloric energy. You still need to fuel, et cetera, but you're talking about neurochemical energy. It fundamentally changes the way you show up to everything else.