Myworkout 4x4
Time-efficient. Measurable. Backed by Science
From the creators of the Norwegian 4x4 Method. Myworkout 4x4 turns decades of research into easy, guided workouts that measure real progress and deliver results you can feel.
Achieve Your Goals
Science-Based Exercise
Just 32 minutes of high-intensity exercise twice a week is all it takes. Get 1% better every week - small gains that compound into lasting health and years of extra life.
Personalized Feedback That Motivates
Every time you complete a heart-strengthening workout, you’ll get clear, science-based guidance on what to do next to reach your goals.
Track Your True Fitness
Measure your VO₂ max with scientific accuracy. Watch your biological age drop and your capacity grow - week by week, month by month.
The Golden Standard for Building Capacity
From elite athletes to everyday users, the Myworkout method is grounded in over three decades of scientific research. The exercise principles behind Myworkout have powered some of the world’s top performers - including Messi, Ronaldo, and clubs like Real Madrid and Barcelona. The same science now helps prevent and even reverse more than 35 lifestyle-related diseases.
People who train with Myworkout
Real users describe how the app makes training simpler, more motivating, and easier to keep doing.
“Great app for estimating VO2 max. Have a look at the research on this app in Pubmed. Impressive data. Easy to use & motivating for HIIT tracking & estimating biological age & VO2 Max. Happy to have found this app 👍🏼”
Stories of Transformation
Discover how real people changed their lives with Myworkout and the 4x4 Method.
Reversed His Type 2 Diabetes with Myworkout
Life got in the way. His health paid the price. Then came the comeback.
Started Exercising at 83
A knee replacement and eye surgery couldn’t stop Lisbeth from beginning her fitness journey.
Nolan Bushnell Just Got a Fitness Upgrade
He mentored Steve Jobs. Now, Myworkout is mentoring him.
Reduced His Biological Age by 40 Years
At first, Øystein’s results showed he was 11 years older than his real age. That shock changed everything.
Download the app to get started on your transformation