I live in a particularly hilly area and have just finished c25k. I have mostly run around the neighbourhood for the past 8 weeks and as a result the vast majority of my runs have incorporated some kind of hill. For example, the elevation on my 5km route looks like this:
Today it occurred to me that it may not be a good idea to run these kinds of hills every run (in my case, 3x a week). How should I be structuring my runs? Is it okay to continue like this, or should I incorporate a flatter run into my route on a regular basis?
As an example, this is a 6.2 km route which is mostly downhill/flat for the first 4.5 km. I usually walk up the hill for the last 1.2km or so. This route is for when I want to have an easier run that's more flat or downhill.