Apple Watch: the inconsistent frequency of heart rate measurements is a feature, not a bug

We noticed that Apple Watch had stopped recording the heart rate every 10 minutes after installing the Watch OS 1.0.1 update.It wasn’t clear if it was a bug, or Apple had tweaked it to improved battery life. It was not such a big issue for me, but some users are quite annoyed that their Apple Watch has stopped measuring it every 10 minutes.

The support document, first spotted by 9to5mac, notes that “Apple Watch attempts to measure your heart rate every 10 minutes, but won’t record it when you’re in motion or your arm is moving,” essentially saying that the lack or heart rate recordings for extended periods of time is an intentional feature of the device.

Prior to the software update, Apple Watch would check heart rate every 10 minutes or so, depicting a consistent picture of a user’s vital throughout the day.

We’re not sure what the reason behind this change is. Some attribute it to the fact that Apple wants to be even more conservative on power management, but heart rate measurements at 10 minutes intervals had a negligible impact on battery life to begin with.

Besides, the fact that Apple Watch won’t check your heart rate when you’re in motion or when your arm is moving seems to be counter intuitive. Isn’t the goal to measure your heart rate when you’re actually moving? If Apple Watch is going to frequently check my heart rate when I’m sitting on the couch watching TV, I’m not certain it will be providing meaningful data about my health.

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