PAI is a personal physiological activity indicator, based on heart rate data, combined with daily activity intensity and multi-dimensional dynamic comprehensive evaluation of personal physiological data, converted into an intuitive PAI value through an algorithm. It does not depend on a single item of data, while it allows you to have a comprehensive system to understand the physical condition.

Only a certain intensity of daily activities or workouts is required to acquire a PAI value. According to the research results of the HUNT Fitness Study *, keeping your PAI above 100 will help reduce the death risk of cardiovascular disease, and increase life expectancy.