(And Why It’s Not All in Your Head) is this you at the end of the day ? Have you ever closed your laptop at the end of the day and felt like you’d just run a marathon — even though you barely left your chair? Your body feels heavy.Your brain feel s foggy.You promise yourself you’ll go for a walk… and instead you scroll. Most people assume this is a motivation problem. Or a willpower problem. Or a “I’m just getting older” problem. It isn’t. It’s a body-in-a-screen-world probl