The week started with the pain in my lower back. It might not have been necessarily related to my running, but I still had to be careful. Day 1 was another park run, and I found it rather difficult, because of the posture I had in attempt to minimise the pain. But also 3-minute runs seemed like a huge jump compared to last week. However, I have managed to finish it, but didn't feel great. I gave it 2 days before attempting my second run, this time on treadmill, as it was easier to control the pace and the impact. And it was bit better, but I was still struggling with 3-minute parts. I gave it another few days, so my last run of the week creeped into week 4 as I only managed to do it on Monday; again treadmill to lower the risk. My back felt much better now and I had slow and steady pace. On my last 3-minute run I felt like I really own it this time. Even managed to sprint last 30 seconds (adrenaline, you know).
Observations for this week: it was first time since the start that I was actually struggling with the runs. I can't blame everything on back pain, although it definitely didn't help. I probably need to go even slower for next week to keep up. Week 4 here I am.