What is Polar OwnZone?
Polar OwnZone is a function available on a lot of their Heart Rate Monitor devices, but what is OwnZone??, why must I use OwnZone?, there is an write-up inteneded as a guide to get you started and optimistically try the OwnZone system on your Polar watch.
eHeartRateMonitor.co.uk has an guide on what the Polar OwnZone is for and why you should use it. It explains that the OwnZone system constructed into Polar Heart Rate Monitors sets heart rate zones according to your resting heart rate at the begining, taking into your personal currently programmed into the watch.