I thought this would be a doddle after the 20 min run of week5 run3. But I found it quite hard at the end. Not sure why. My breathing was ok but my legs felt like lead. Does that ever go I wonder? In the early days of running I would run out of breath before the legs got tired and now it's the exact opposite. Any kind of hill (or let's be honest, incline however small) really affects me. I need flat ground or even a lovely bit of down hill to propel me along!!! Haven't looked up the next run yet. Might just let it be a surprise for me tomorrow night!