Most fitness content treats anything past your twenties or thirties as decline management. We're ranking five decades, fifteen to sixty-five, on where they actually sit for building strength, and the order isn't what you'd expect.
The decade almost everyone writes off as the beginning of the slide turns out to be the one with the highest leverage of any decade on the list, for a reason most people have never been told clearly.
We go through what's actually happening in your body decade by decade, why the same training approach stops working as you age, and exactly what to prioritise wherever you are right now, whether that's your twenties, your forties, or coaching a teenager in your house.