Apple Watch can accurately detect stress, study indicates

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Apple Watch can detect and track stress levels. And it can accurately predict the stress level of Apple's wearable

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Apple may one day include stress monitoring features in WatchOS, combining data from the device's sensors with algorithms to predict and track stress levels

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iPhone 7 and Apple Watch Series 6 that support ECG monitoring. Instructed to collect ECG six times a day at maximum interval of three hours

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Developed machine learning algorithms to interpret data. The researchers used the ECG to extract heart rate variability (HRV) values, a parameter that can measure stress

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"This is the first study to use Apple Watch ECG data to predict individuals' stress levels."

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Additional health data points from the Apple Watch, such as sleep and physical activity, could improve the device's ability to predict and track stress

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Apple can also find ways to passively track stress. The researchers asked the volunteers to take multiple ECGs paired with a questionnaire

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