The Norwegian 4x4: The Best HIIT Workout to Boost Your VO2 Max and Turn Back Time
What it is, why it’s awesome, and how I do it
Published in
6 min readApr 28, 2024
Once a week, my wife watches me ride what I call the Norwegian rollercoaster.
It involves a highly beneficial HIIT-style workout and a rollercoaster of emotions.
