Polar h10: why is my heart rate flat on the app, but continuous on Garmin watch : r/Polarfitness

The Orthostatic test result is different between the watch and the Flow app : r/Polarfitness

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Polar H10 not measuring heart rate even though connected to polar flow app? : r/Polarfitness

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Polar H10 Heart Rate Monitor Chest Strap - ANT + Bluetooth, Waterproof HR Sensor for Men and Women (NEW) : Sports & Outdoors

POLAR Grit X - Rugged Multisport GPS Smart Watch - Ultra-Long Battery Life, Wrist-Based Heart Rate, Military-Level Durability, Sleep and Recovery, Navigation - Trail Running, Mountain Biking : Sports

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