Katie Barngrover

If you've been doing everything "right" with movement this month and still feel like something's missing, this might be it: timing changes what the same effort actually does for your body. Here's a strange but real data point. Researchers analyzed 25 seasons of Monday Night Football, from 1970 to 1994. When West Coast teams traveled east to play, they beat East Coast teams more often than home-field advantage should allow — even though they were the visitors. Why? The East Coast team kicked...

If you're already trying to move more but still feel exhausted, off-schedule, or wired-but-tired by mid-afternoon, the missing piece might not be what you're doing — it might be when. Right around sunrise, your brain sends a signal to your liver: wake up. That signal is cortisol — not the "stress hormone" version everyone's afraid of, but the healthy kind, doing exactly what it evolved to do. It nudges your liver to release stored glucose from your glycogen reserves, giving you the energy to...

You finish a workout and instead of feeling energized, you're flattened for the rest of the day, sometimes the next one too. So you tell yourself you need to push harder, get more consistent, build endurance. But more of what's already wrecking you isn't the answer. Here's the math most people never see. When your body burns glucose for fuel, it produces about 2 units of usable energy per molecule. When it burns fat and produces ketones instead, that number jumps to roughly 32 units per...