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What you need to know

• Fitbit has launched two voluntary Labs studies to study your body’s long-term health trends.
• Fitbit Hypertension Lab will look for signs of high blood pressure in Pixel Watch 3 owners, and compensate some volunteers with gift cards.
• Unusual Trend Detection will detect changes in your health and have you “log possible causes and symptoms” for Google’s research study.
• Google is also currently running a public preview for its Fitbit Personal Health Coach.

Google is recruiting “up to 10,000 eligible participants” to wear their Pixel Watch 3 for 180 days, so Google can study your data for signs of hypertension, or high blood pressure, in order to “advance research that could one day help users take proactive steps toward better heart health.”

First spotted back in September by 9to5Google, the Hypertension Study is now available to Pixel Watch 3 owners this week, though not on the Pixel Watch 4 or older models. You must be American, 22 years or older, and fill out a questionnaire in English for eligibility. Google will use your responses to decide whether to include you in the study.

Google also launched a second study this week called “Unusual Trend Detection,” which will give you a “heads-up if your health metrics look different” from normal and “contribute to a research study.”

(Image credit: Michael Hicks / Android Central)

To find these studies, tap your profile icon in the Fitbit app, agree to “allow your data to be used for research and development,” and then see which Fitbit Labs you’re eligible for.

Sign up for the Fitbit Hypertension Study, and you may be sent a blood pressure cuff, which you’ll be asked to wear for 24 hours in tandem with your smartwatch before sending it back. Google will give this select group $25 gift cards as an incentive; every other participant won’t be compensated.

Google warns that activating the hypertension study will cause a “slight, temporary change in your watch’s battery life,” but “should still last a full day on a single charge.” Evidently, your Watch 3 sensors will be working overtime to detect high blood pressure warning signs, though you won’t be given “any medical advice, analysis, or feedback on your health” based on your data; it’ll only be used for research.

Eventually, Google may use this data so that future Pixel Watches catch warning signs of chronic high blood pressure, which can lead to heart attacks or strokes. Apple Watches added hypertension alerts earlier this year, after collecting “training data from multiple studies totaling over 100,000 participants.”

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The other study, Unusual Trend Detection, will be a more active experience for participants. Google will notify you directly if it detects abnormal trends and ask you to “log possible causes and symptoms.” It’ll then give you “tips for rest and recovery,” and once you’ve returned to your “typical patterns,” the Fitbit app will let you know.

In theory, Google will be able to build out a database of physiological responses by detecting a specific health trend and then asking you what caused it — such as if you appear more stressed than usual and attribute it to drinking extra coffee.

Google is also in the midst of testing its new Fitbit Personal Health Coach, which gives you “Insights” on your recent health trends and answers questions about health and fitness using your smartwatch data for context. These new Fitbit Labs studies seem to intersect with this goal, as it will allow future versions of the Fitbit Coach to describe possible causes for negative health data — such as hypertension.

Michael is Android Central’s resident expert on wearables and fitness. Before joining Android Central, he freelanced for years at Techradar, Wareable, Windows Central, and Digital Trends. Channeling his love of running, he established himself as an expert on fitness watches, testing and reviewing models from Garmin, Fitbit, Samsung, Apple, COROS, Polar, Amazfit, Suunto, and more.