How PAI improves long-term health & fitness

From its concept to research, development and release, the purpose of Personal Activity Intelligence (PAI™) has been to motivate people to improve their long-term health.

The connection between deliberate exercise and increased health and wellness was highlighted in the HUNT study, one of the world's largest health studies.

On the HUNT for answers

PAI is the first scientifically-backed metric that tells you how much exercise is needed for maximum protection from cardiovascular disease mortality and other lifestyle disease mortality. The PAI algorithm has been validated by the HUNT study involving over 45,000 people over a 25-year span. The study was led by Dr. Ulrik Wisløff at the Norwegian University of Science and Technology and the findings have been published in the American Journal of Medicine.

Wisløff discovered that maintaining 100 PAI or more significantly reduced the risk of all-cause mortality and cardiovascular disease mortality among men and women of all ages. Those who maintained activity levels with the equivalent intensity and duration of 100 PAI or more, saw up to a 25% risk reduction in cardiovascular disease mortality and lived on average 5 years longer. He also discovered that reaching 100 PAI or more weekly reduced the risk of premature death, regardless of whether the current established guidelines for physical activity were reached.

And as a starting goal, it's been found that even maintaining 50 PAI is a significant milestone providing 60% of the maximum health benefits.

How to earn PAI with 'deliberate exercise'

Deliberate exercise is any exercise intended to increase your heart rate, especially in the medium to high intense range. (Remember, you’ll earn the most PAI when your heart rate is in the high intensity range).

The emphasis on deliberate exercise is to refute ‘water cooler’ steps—strolling around the office and to the water cooler a few times per day and counting those steps towards exercise.

PAI is a more accurate measure of fitness than step counting because it counts even those activities that don't involve steps like biking, rowing, and yoga. Unlike step counting, PAI places an emphasis on what matters—heart rate.

Take this chart for example.

By aiming for a higher heart rate during exercise instead of counting steps, you can actually see how your health is improving. Your PAI Score will tell you whether you’ve done enough activity over a rolling 7 days for optimal health benefits.


Visit for more information on the science behind PAI, and to download the PAI Health app.

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