The Workout Everyone Needs To Try! Norwegain 4x4 Method | Jan Helgerud
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BOOK: The Norwegian 4 x 4 Method - Science, History and Practice from its Creators
Today on the podcast, I’m joined by Jan Helgerud, one of the world’s leading researchers in cardiovascular fitness and high-intensity interval training.
Jan is best known for the Norwegian 4×4 method and decades of research showing how improving VO₂ max isn’t just about performance, it’s one of the strongest predictors of long-term health and longevity.
In this conversation, we break down what the science actually says about cardio intensity, how often you really need to do it, and why smart…
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