Originally Posted by giantbike
If you download your excercise data onto the Polar Precision Performance program and observe if there is any spikes of your heartrate which would indicate there was some kind of interference.But if the heartrate was increased gradually then it could possibly be your highest heartrate ever.
You're right, but it's a better practice to work out whether the HRM is showing faulty readings
straight away. Atrial Fibrillation or Heart Attack are not conditions you want to mess with. Just take your pulse and watch the monitor at the same time. On Polar HRM's you should see the little heart filled each time you feel a heartbeat on your pulse.