Well, I finished week 4 yesterday. I was tired before I started so I 'cheated' by doing a few turn arounds to find the flatest areas and even managed to find a downhill section for some of the final 5 minutes. At the end I thought I really needed to repeat another week 4 run before moving onto week 5.
However by last night I decided I had completed the first 2 runs taking whatever hills lay in my path, I had completed the easier route and as I was eager to see how I get on in week 5 I'm going for it tomorrow.
I'm being active for the next two weekends and last weekend I found it too much doing the run on the Friday so I will run tomorrow, then only Monday and Wednesday next week to give my body a chance to cope with everything. It will be interesting to see how the runs go with those breaks.
Good luck to everyone else out there battling through this. Not only CAN we do it, we ARE doing it.