When setting up a workout, could you add the possibility to set several heart rate zones as target heart rate? I know I can set a custom heart rate target, but I would like to use zones for this. For instance running an interval in zone 3 and 4. Or for instance a cooling down in zone 1 and 2. Again I know you can set a custom zone, but this does not automatically adjust as pulse zones change, which they will over time. As it is now I have to manually adjust the custom target heart rate zones for lots of workouts every time my pulse zone changes. This is quite annoying.