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Quick Summary Exercise does way more to your brain than most people realize — we're talking dopamine, serotonin, BDNF, the whole thing Some of it is overhyped and some of it genuinely changed how I think about working out entirely If you've ever felt weirdly calm or sharp after a workout, there's a real chemical reason for that and it's worth understanding Photo by Isaac Wendland on Unsplash A few years back I went through a rough patch. Nothing dramatic — just the kind of slow-burn anxiety and brain fog that creeps up on you and then one day you realize you haven't felt like yourself in months. I tried a bunch of things. Supplements, sleep tracking, cutting out caffeine for two weeks (brutal, by the way). But the thing that actually shifted something was when I started walking every single morning. Not a gym. Not a program. Just walking. What surprised me wasn't that I felt better. I expected that, vaguely. What surprised me was how fast it happened, and ho...