Ha ha, the title says it all. My back pain from W3 continued into W4. Somehow I managed to do the first 2 runs, although it didn't feel great I have to say. In mean time I also got some kind of flu accompanied with diarrhoea and I had to call the day. I was really tempted to do the last run of the week 4 but reading stuff on the net suggested I should really sit this one down. It was my longest break since the start: 5 days. In mean time I went to 9-day holiday in Spain and it was really my second day there that I felt like I was back to normal. And what do you know: I did 3 runs on my holiday(!). I feel more and more like a proper runner now. And after 5-day break I thought I would struggle (it was also 30-ish degrees that evening), but still enjoyed the run, and W4R3 was one of my most enjoyable runs. Did another 2 in the same manner and decided to schedule the dreaded W5R3 when I get back home.
I did't feel great that day. As it turned out later it was early chest infection that I picked up from the guy sitting behind and coughing throughout the journey in tightly packed RyanAir aircraft. 3 hours before the scheduled run I felt very hungry and went to local restaurant that was close to place of work. I know rice is digested quickly (2 hrs max) as well as chicken (same amount of time), but neglected to include curry sauce in my calculation. And there I was running my first 20 minute interval at snail pace (slowest pace since week 1) with curry in my throat and tightness in my chest. Regardless, I did it! So proud of myself!
However that chest infection got worse and I am currently on antibiotics. Lost full week and a half in the process, combined with my pre-vacation issues (currently on day 4 of the rest). Never had to repeat days/weeks though and currently extremely positive that I'll nail that week 6!