Samsung's latest smartwatch reportedly already has a firmware update. The new download confers blood-oxygen measurements as well as the ability to track maximal oxygen uptake (or VO2Max). Therefore, the wearable may be better equipped to help the user get an idea of important aspects of their health and fitness.
https://www.notebookcheck.net/The-Samsung-Galaxy-Watch3-is-updated-for-the-first-time-bringing-blood-oxygen-metrics-and-more.484822.0.html