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Apple Watch Series 12 gets more frequent heart rate checks

The new Apple Watch Series 12 measures your heart rate every five seconds, which is 60 times more often than the previous model. Early testing found it closely matched specialized chest-strap monitors during cycling and running, with minor inaccuracies at higher heart rates and weightlifting. The step counter was generally accurate. The watch also features a faster chip and a readiness score for recovery insights.

Why it mattersHeart rate accuracy and recovery scores help users manage workouts, stress, and overall health. The more frequent checks could improve early detection for people tracking heart conditions.

Sources covering this

Tom's GuideApple Watch Series 12 review: A new heart rate sensor and a readiness score make this the best smartwatch on the market12:00 PM9to5MacThe Quantified Scientist tests the Apple Watch Series 12’s new heart rate sensor11:08 PM

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