Tagging along here because we know each other and I also ran a HM yesterday.
M31, I found the thread in March whilst I was into the Pfitz 12/55 plan for a May marathon, and decided I'd pick this up once I got done frying myself with what I was currently doing. It was a condensed block because I picked up yet another injury in early December that wrecked my ability to run until late January and I was too stubborn to bail out of my home marathon for a second year in a row. I got through the block somehow unscathed and in fairness I did gain a lot of fitness quickly and logged a respectable 3:19, taking my 5k time down to 19:13 from a 20:11 and doing a 10k TT of 40:25 in the process of that block. I knew though that there had to be a more sustainable way to train in general given how cooked I felt on a plan that was just 5 days a week. So post-marathon, I hopped on this train totally inspired by the good things coming out of this thread.
My week usually looks something like this:
M: 45-60' E
T: 8x4' off 60s (~2k wu/cd)
W: 60' E
T: 4x8' off 60s (~2k wu/cd)
F: 60', E
S: 2x4' off 60s - parkrun @ sub-t - 2x4' off 60s (~2k wu/cd, the bit inbetween parkrun and the 2nd set of reps has around 800m of a jog warmup)
S: 90' E
I like doing parkrun as it's the only time I'm running with other people, and wanted to find a way to still incorporate that into this without just shuffling it. The first couple of weeks I ended up comfortably below 20% of quality work because my shuffle to parkrun is nearly 5k itself, hence the janky extra 4' reps on the run to and from the parkrun. Forgive the compromise there.
Once I got into the swing of it, the training has felt super sustainable despite moving up to 7 days a week. I run to heart rate rather than pace because I don't live in a flat area, but it's pretty easy to figure out the right intensity to run every run at which I guess is 95% of the battle and I don't mind the monotony of it because it reduces the risk of me being a moron and doing something badly wrong and getting hurt again.
I've knocked the 5k PB down over the summer to 18:51 which given the temperatures that was run in is good work since the previous PB was set in perfect conditions, but nothing absolutely groundbreaking just yet. Then I got badly ill at the start of August and lost nearly 3 weeks of normal running before slowly getting back to it and setting myself up for yesterday's HM but a bit cautious as it took until a couple of weeks ago for me to feel like I had recovered what was lost.
Yesterday was a perfect day in the UK to set a quick time, cool, no wind and overcast conditions. I thought I was good to run a 1:29-something as long as nothing went wrong and maybe a 1:28 if stars aligned. 3k in I realised that I already felt strong enough to break from the original plan and push the pace slightly, and after another 3k I felt the same thing again. I just started latching onto the next group, sitting with them for a little bit and then deciding I wanted to be in the group ahead and then just doing it. It didn't feel like it required extra effort, it just happened. By the time I got into the final 5k, I was comfortably running what I thought was my PB 5k pace and just breezing past people who themselves weren't fading or seemingly struggling. I even had one final gear to go up in the last few hundred metres and came across the line in 1:25:13. I still can't quite believe it.
I'm glad I found this thread, massive thanks to everyone who has made a positive contribution in here. I'm one of the lucky sods who has got a ballot entry into London next year, so I'll give the marathon build a go, and hopefully I can report back with a time that begins with a 2.