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What Heart Rate Variability Means on Your Fitness Tracker—and Whether It's Worth Paying Attention To

Here’s what this health metric really indicates, according to cardiologists. Fact checked by Isaac Winter Reviewed by Vivek Cherian, MD Heart rate variability (HRV) is the difference in the timing ...
News Medical

Study links sleep heart rate variability to stroke and depression risk

New research, presented today at the European Academy of Neurology (EAN) Congress 2025, has uncovered a powerful link between nighttime heart rhythm and future health conditions, even in people with ...
EurekAlert!

Variability in heart rate during sleep may reveal early signs of stroke, depression or cognitive dysfunction, new study shows

(Helsinki, Finland, Saturday, 21 June 2025) New research, presented today at the European Academy of Neurology (EAN) Congress 2025, has uncovered a powerful link between nighttime heart rhythm and ...
The Dispatch / The Rock Island Argus

What to know about heart rate variability — the biometric most fitness trackers measure

As wearable technology has grown more popular, it’s not just researchers and cardiologists who are paying attention to heart rate. You might be monitoring your own all day long via a fitness tracker ...
Yahoo

Science reveals how hydration can influence your heart rate variability

Even mild dehydration can negatively affect your brain functioning and attention span, so it could be holding you back at work and getting in the way of your goals. Drinking a glass of water could ...