https://wccftech.com/new-study-finds-that-apple-watch-can-accurately-determine-frailty/

The Apple Watch is probably the best smartwatch when it comes to health-centric features. Users have reported incidents where the wearable saved their lives or alerted them before the illness. The smartwatch comes equipped with a boatload of sensors that determine a user's health condition. According to a new study, the Apple Watch has the ability to accurately assess a person's Frailty.

As mentioned earlier, the Apple Watch has the ability to determine "frailty", according to Standford University's recently published study (via MyHealthyApple).  If you are unfamiliar, frailty can be measured using a six-minute walking test which evaluates a user's exercise capacity and functional mobility. The higher the result is, the healthier the patient's cardiac, respiratory, neuromuscular, and circulatory functions will be according to Apple.