can last up to 13 days in smartwatch mode, while hybrid options like the Withings ScanWatch 2 Go to product viewer dialog for this item. can last up to 30 days.
Many modern watches also track sleep quality, stress levels, and blood oxygen (SpO2) saturation. Key Features to Look For
Track your resting heart rate (RHR) over time; a lower RHR often indicates improved fitness.
Real-time feedback helps you avoid overexertion and lets you know when your body needs more recovery time.
Most watches use optical sensors (PPG) that measure blood flow through the skin. For medical-grade precision during intense workouts, some advanced models also offer ECG/EKG sensors to detect irregular rhythms like AFib
The Ultimate Guide to Buying a Heart Rate Monitor Watch in 2026
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