To turn off your Polar OH1 heart rate monitor, press and hold the button until the lights turn off.
That's the straightforward answer, but here's a bit more detail, particularly if you're using a different Polar heart rate sensor:
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Polar OH1: As mentioned above, a long press of the button will shut it down.
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Polar H10 and Similar Chest Straps: These typically don't have an on/off switch. They automatically power down when they no longer detect a heartbeat. To ensure they turn off, detach the sensor from the strap after use and store it separately. This prevents it from accidentally detecting faint signals and staying on.
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Other Polar Devices (Watches, etc.): If you're thinking about turning off the heart rate monitoring feature within a Polar watch or fitness tracker, you'll usually find this setting within the device's menu. The exact location varies by model, but look for options like "Heart Rate Tracking," "Continuous Heart Rate," or similar terms in the settings. Switching this off stops the device from constantly monitoring your heart rate, saving battery life. You don't typically "turn off" the entire watch to simply stop heart rate monitoring; you just disable the feature. Consult your Polar device's manual for precise instructions on how to do this on your specific model.
In summary: For dedicated heart rate sensors like the OH1, holding the button down powers it off. For chest straps, detaching the sensor turns it off automatically. For Polar watches, disable the heart rate monitoring feature in the settings.
