Digital WorldGlobal issuesHow does a smartwatch measure your heartbeat?To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 videoDigital WorldGlobal issues02/10/2024February 10, 2024There are two ways wearables measure a person's heartbeat: optical pulse measurement using light and a heart rate sensor that records the heart's electrical activity.https://p.dw.com/p/4cDK7Advertisement