The Apple Watch can accurately predict stress levels, according to a study conducted by researchers at the University of Waterloo, Canada (via MyHealthyApple).
Using the Apple Watch Series 6 ECG sensor, researchers found that there was a strong association between ECG data, including cardiac acceleration and deceleration capacity, and stress levels reported by participants at the time the measurements were taken. Machine learning algorithms were then developed using this information to create a prediction model.
Stress models are said to have a “high level of precision”, but lower recall. The study concludes that the Apple Watch has “promising” potential for predicting stress, and proposes that since the device collects additional health information such as sleep and activity information, even more Data points could be integrated into stress models to increase their predictive accuracy.
Researchers posit that the Apple Watch could be used to aid mental health care, offering activities such as breathing exercises to offset stress cues, responding early to changes in mental health. Competing devices from Samsung, Fitbit, and Garmin have offered a stress score feature for some time, but Apple has yet to implement such a feature in its Health app.
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