A member asked:

Apple watch has made curious why is my resting heart rate in 50s - 40s, it once reached 39 while sleeping. its exactly 40 most of the time.i feel like my heart drops or beats too fast suddenly. ecg says sinus rythem but some times shaky?

A doctor has provided 1 answer
Dr. Hiep Le answered

Specializes in Nephrology and Dialysis

If you or anyone close to you can check pulse rate on your wrist or neck, do it first for one minute to confirm the accuracy of the apple watch's pulse rate. If you are very fit and exercising a lot, pulse rate can be in the 40-50 at rest and pulse rate is often dipping during sleep.

Answered 5/2/2022

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