initiates a cascade of more frequent tachogram collection—as frequently as possible, subject to a minimum spacing of 15 minutes—and analysis. Apple Watch co...

https://www.apple.com/jp/healthcare/docs/site/Apple_Watch_Arrhythmia_Detection.pdf

Estimating Sleep Stages from Apple Watch Estimating Sleep Stages from Apple Watch September 2023 Overview Apple Watch users can track their sleep with Apple...

https://www.apple.com/jp/healthcare/docs/site/Estimating_Sleep_Stages_from_Apple_Watch_Sept_2023.pdf