Do you really need 150 minutes of zone 2 cardio a week?
Zone 2, easy aerobic work where you can still hold a conversation, became the longevity crowd's favorite prescription, often quoted as 150 to 180 minutes per week. Supporters cite mitochondrial health and metabolic benefits. Skeptics ask whether the specific zone matters, or whether total activity is doing the work.
The consensus meter
All 3 tracked experts endorse aerobic volume; the debate is whether zone 2 itself is special or just a fatigue-cheap way to accumulate volume.
What the experts say
Quoted directly, linked to the source. We never publish a position we have not verified.
- supportive
Andrew Huberman
Professor of neurobiology and ophthalmology, Stanford School of Medicine; host of the Huberman Lab podcast
“Getting 150 to 180 minutes of so-called zone 2 cardio... it's just as a generic recommendation that almost everybody should follow in order to just keep their cardiovascular system healthy.”
On 150 to 180 minutes per week of zone 2 as a baseline for cardiovascular health. Source
- nuanced
Peter Attia
Physician focused on longevity medicine; host of The Peter Attia Drive; author of Outlive
“Zone 2 isn't a secret physiological lever, nor does it provide some sort of mitochondrial magic that only exists at this intensity.”
On Whether zone 2 has a unique mitochondrial benefit; he frames it as a fatigue-cheap way to add aerobic volume, not magic. Source, 2026-08-29
- nuanced
Andy Galpin
Full tenured professor of kinesiology, California State University, Fullerton
“If you're at the pace where you can have a conversation, to me, I don't even count that as exercise. That is just general physical movement, and it is extraordinarily clear you need a lot of that.”
On Zone 2 reframed as daily physical activity rather than dedicated exercise sessions; he also notes zone 2 has almost no ability to block hypertrophy. Source
Last updated 2026-10-15. Educational information, not medical advice.