Cardio fitness is an established predictor of mortality and longevity, but testing it requires a proper maximal-exercise treadmill test that one needs to reach their maximum heart rate (costly & potentially risky).
Modern wearables can estimate VO2max but they require some sort of workout data, potentially excluding the majority of the population (=sedentary people). Our recent research at the University of Cambridge developed and validated one of the first models for non-workout VO2max estimation. Paper: https://www.nature.com/articles/s41746-022-00719-1
TLDR: we can now estimate cardio-fitness just by tracking your everyday movement/heart rate
An interesting side effect of tracking excess deaths for COVID reasons was that we saw the impact of heatwaves in mortality.
For example, Greece had its highest excess death rate of the last couple of years in August 2021 (+61% deviation from expected deaths [1]). Cyprus had similar rates. That was not due to COVID but due to an _once in a lifetime_ heatwave [2].
Nice implementation! We made a similar app a couple of years ago as part of a hackathon project but we never really polished it to submit to an app store
Modern wearables can estimate VO2max but they require some sort of workout data, potentially excluding the majority of the population (=sedentary people). Our recent research at the University of Cambridge developed and validated one of the first models for non-workout VO2max estimation. Paper: https://www.nature.com/articles/s41746-022-00719-1
TLDR: we can now estimate cardio-fitness just by tracking your everyday movement/heart rate