Peter Attia on Norwegian 4x4: VO2 Max, Longevity, and a Reality Check
What the longevity expert gets right—and what to keep in perspective
What the longevity expert gets right—and what to keep in perspective
Peter Attia is a prominent longevity expert who has extensively covered the Norwegian 4x4 method in his podcasts and blog. He often discusses its benefits for increasing VO₂ max—a key marker of aerobic capacity and a strong predictor of longevity. For many fitness enthusiasts, Attia has been the gateway to discovering the 4x4 protocol.
Attia’s advocacy for the Norwegian 4x4 is grounded in solid science. The protocol—4 minutes at 85–95% of max heart rate, 3–4 minutes recovery, repeated 4 times—is backed by research from NTNU professors Jan Helgerud and Jan Hoff. Attia correctly emphasizes that improving VO₂ max can reduce mortality risk and that the 4x4 is one of the most efficient ways to do it.
His podcasts and writing have introduced countless people to high-intensity interval training and the specific structure of the Norwegian 4x4. For that, the fitness community owes him a nod.
Of course, Attia’s star has dimmed somewhat since stepping down from CBS over Epstein links—but his fitness advice on the 4x4 remains solid. The protocol doesn’t care who promotes it; the research stands on its own. If you’re looking for a practical way to boost VO₂ max and cardiovascular health, the Norwegian 4x4 is still one of the best options, regardless of who’s talking about it.
The Norwegian 4x4 was developed and validated by researchers at NTNU—Jan Helgerud, Jan Hoff, and Ulrik Wisløff—not by celebrity doctors. Their work established the protocol’s effectiveness for improving VO₂ max, heart health, and metabolic fitness. Attia has done a good job of translating that research for a broader audience; the science itself is the real authority.
If you want to try the protocol with proper timing and structure, learn how the Norwegian 4x4 app works or read more about VO₂ max and longevity.
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