I just finished week 8 and I am still finding it hard. I would have expected that by now, when I get to half way, I should be feeling OK and only start to tire towards the end but No! I still feel it all the way around. Even after a couple of mins running I feel like I could just stop. My legs feel heavy and I have to push myself. I manage OK with breathing I'm not too out of breath (no more than you would expect for running) and I go very slow. I manage to complete the runs but they are tough.
Thinking I might repeat week 8 before trying week9.