It sounds like a nudge toward the gym. It is a prescription, and prescriptions carry a dose.

Attia chose the word drug on purpose. A drug has an amount, a schedule, and a thing it is aimed at. Miss any of the three and you are not medicated — you are hopeful.

The amount and the schedule, most people can recite. What almost nobody can name is the third one. Aimed at what?

Attia's answer is specific to the point of discomfort. Write down the ten things you intend to still do in the last decade of your life — lift a bag into the overhead bin, get off the floor without a hand, carry a grandchild up a flight of stairs, cross an airport without sitting down.

Then work backwards. From the strength that takes at eighty, to what you must hold at fifty to still have it at eighty.

That is the whole gap between exercising and training. Exercising is something you do. Training is something you do in order to arrive somewhere.

The list is where it turns personal, because nobody's ten are the same. The uncle who has run his stall for thirty years wants to stand for six hours. Your list will hold one line you have never said out loud, because saying it admits you plan to get old.

You have been dosing for that decade for years. You have just never read the label.

So today, before anything else: write the ten. Not a program, not a plan — ten sentences, each one a thing you intend to still be able to do at eighty.

Then look at what you actually did this week, and ask whether one hour of it was aimed there.