Well thats a tough little beast of a run that is. After an epic 20min last run i've decided that I dont like walk intervals anymore lol. What once was there help now seems to make it harder.
I finished it well though and kept the same 8km/h pace for runs as i did on last run. Definitley had to give it some at the end.
I covered 4km in the 34mins and awesomely my heart rate stayed in the green the whole time! Thats certainly a first.