If you've tried 'eating less and moving more' and it stopped working in your 50s — you're not broken. You're just playing by the wrong rulebook. The fitness industry was built around 25-year-olds. Their hormones, their recovery speed, their metabolism. But after 50, the biology shifts in ways that make those old rules not just ineffective — they can actually work against you. Here's what 20+ years of working with adults over 50 — and the latest research — actually shows works