Cardio fitness score explained: Fitbit, Oura, WHOOP and more
Cardio fitness score is a wearable's VO2max estimate. How Fitbit, Oura, WHOOP, Apple, Garmin and Polar calculate and label it, plus scores by age.
#norms
Garmin VO2max explained: colours, accuracy, fitness age
What your Garmin VO2max number and colour mean, where to find it, how accurate it is, why it drops and how fitness age is worked out.
Is fitness declining? Global trends in cardiorespiratory fitness
Children and adults are less aerobically fit than a few decades ago. What the data on millions of people show, why it happened and what you can do.
VO2max norms by age and sex: what is a good VO2max?
What counts as a good VO2max for your age and sex, where the norms come from, and how to read percentiles without fooling yourself.