How to Manage your Pace/Speed Zones
The Pace Zones settings page, located under My Settings -> Zones - > Pace/Speed Zones, allows you to select Pace Zones and set your sport specific pace zones based on various methods. You can then auto calculate your zones by clicking on the "Show auto calculation methods" button and choosing one of the available options.
Once your zones are set using one of the included methods, if you don't like them, you can manually set the zones to whatever you feel is most correct for you. Additionally, since your zones are sport specific, make sure, when clicking "Add Zone", to select the correct sport type!
For more information, please see Joe Friel's Quick Guide to Setting Zones