This review really focusses on the optical HR data collection with my newly purchased Polar Vantage V3 watch.
Last autumn, I bought a Garmin Vivoactive 5 watch, largely to collect data that was then pulled in by Athletica.ai, such as sleep, resting HR and HRV. Watches have never really been a maor part of my sports data collection - because I almost explusively train on a bike, I generally collect data via a Garmin Edge bike computer (currently an 840), or via trainer software such as Zwift. So, why go back to Polar, specifically the Vantage V3?