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My smartwatch often shows a resting heart rate several beats per minute higher or lower than the pulse reading I get at a clinic. The readings usually happen at different times, but I’ve also noticed a difference when I check them close together.
How much variation is typical between smartwatch heart rate readings and a manually measured pulse? I’m curious whether wrist position, movement, or the device’s sensor could explain the gap, and when it would make sense to ask a clinician about it.
