The latest smartwatches do much more than count steps. New sensors measure blood oxygen, skin temperature and heart rhythm, and the software now turns that data into simple daily advice.
Instead of a wall of charts, owners get a short note: sleep earlier tonight, take it easy today, or go for that run because recovery looks good. Early studies suggest the nudges help people build steadier routines.
Doctors welcome the trend but warn that a watch is not a diagnosis. Unusual readings are a reason to book an appointment, not to panic.
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