Struggling with erratic heart rate data on your Fenix 8? Here is how to fix.
The Elevate Gen 5 sensor uses light absorption to track your blood flow and pulse accurately.
Erratic readings are usually caused by environmental noise like sweat or movement, not a broken sensor.
Tighten your strap to prevent external light leakage without cutting off your critical blood circulation.
Shift the watch one finger-width above your wrist bone to ensure consistent, reliable skin contact.
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