The question has a published answer, and it is more specific than most people imagine. It is not «move more»: it is an amount, with units.
The dose, in one line
For a healthy adult, the public physical activity guidelines recommend, per week:
- 150 to 300 minutes of moderate intensity aerobic activity, or
- 75 to 150 minutes of vigorous intensity, or any equivalent combination of the two, and
- two days or more of strength work involving all the major muscle groups.
The exchange between the two is two for one: one vigorous minute counts as two moderate ones. That way you can split it without odd arithmetic.
Where the line between moderate and vigorous falls
Without a heart rate monitor, use the talk test: at moderate intensity you can talk but not sing. At vigorous you cannot say more than a few words in a row without stopping to breathe.
The curve is not a straight line
This is what changes how you approach the whole thing. The benefit does not grow in proportion to the effort: by far the stretch that pays most is the one from nothing to a little. Someone who does nothing and starts moving gains vastly more than someone who already meets the dose and doubles it.
Two practical consequences, and both go against what you usually hear:
- If you do nothing, you do not have to reach 150 minutes for it to be worth it. Twenty minutes of walking three times a week is already buying the expensive stretch of the curve.
- If you already meet it, doubling the volume pays little. There the margin is in quality, strength and rest, not in more minutes.
The ten-minute minimum is gone
For years it was repeated that a session had to last at least ten minutes to count. That condition was removed in the revision of the guidelines: everything counts. Climbing stairs, carrying the shopping, three minutes of brisk walking. Activity accumulates; it does not need permission to be long enough.
Strength is not optional
The two days a week of muscle work are in the recommendation with the same standing as the aerobic part, and they are the part most people skip. No gym is needed: body weight counts, so do bands and the loads of daily life, as long as the muscle reaches a point where repeating is hard.
And from sixty-five onwards a third leg is added that almost nobody mentions: balance training. It is the one that prevents the fall, which in that age bracket does more damage than almost anything else.
Sitting counts separately
The other half of the message: moving more and sitting less are two different recommendations, not the same one said twice. You can meet the weekly dose and spend the rest of the day sitting, and that is still a problem in its own right.
Where each figure comes from
- health.gov — Physical Activity Guidelines, second edition: weekly dose, the 2-for-1 exchange, removal of the ten-minute minimum, balance from 65 onwards.
- FM 7-22 — Physical readiness doctrine: movement patterns and programming.
- CDC / NIOSH — Criteria for manual handling of loads.
United States Government agencies publish in the open and their works are not subject to copyright under 17 U.S.C. § 105. Every figure can be checked one by one; the writing of this article is our own work.
This is a summary. The eight movement patterns, the six variables a week is programmed with and the lifting equation with its factors worked through one by one take up a good deal more. It is in the Codex of the Load, a 70-page PDF in Spanish, English and French.
Published by VILLUMINATIONS. This text is informational and does not replace the care of a licensed health professional.
