We all want to get stronger and fitter without spending hours on our exercise routine, which is why the Norwegian 4x4 workout method could be your new fitness obsession.

It was first developed by researchers at the Norwegian University of Science and Technology and is touted as a science-backed way to boost cardiovascular fitness and improve VO2 max.

If you want to build better fitness and increase longevity, the Norwegian 4x4 could be for you. Plus, it can be applied to multiple types of exercise, including swimming, cycling, and running. Here’s everything you need to know to get started.

What is the Norwegian 4x4 method?

The method involves high-intensity interval training (HIIT) split into four minutes and four intervals while working at roughly 85-95% of your maximum heart rate, me

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