Vitals, Sleep, and ECG: Importing Your Apple Watch Data
Your Apple Watch quietly keeps good records — your heart rate through the day, how you slept, the occasional ECG. PHR can pull that history in so it lives alongside the rest of your health record, no retyping. The one thing to know up front is that the watch doesn't talk to PHR directly: its data flows into the Health app on your iPhone, and PHR reads it from a Health export file.
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