Well that escalated quickly. It is exactly double the speed of what you did and for 2.3 times longer distance.
Sub 20 5K is no joke. I realized it when i was doing 500m intervals. I was going all out doing a little over 2 minutes. Then after some time i broke the 2 minutes barrier. I was finishing at 1:57 or so, dead legs, heart rate over the top, feeling i want to faint. And then it struck me, a sub 20' 5K is to do this thing 10 times in a row. Doing a distance at 20' 5K pace and then counting how many times you gotta repeat it to achieve it makes you realize the difficulty magnitude of it, the hard way.
I remember having similar experiences when i was running regularly, a pace of sub 5:00 was hard to maintain for longer than a km. I don't think i went sub 5 for longer than half a km. I'd be surprised if i ever did but i dont remember seeing it. But you know what i prob did it once or twice but it would have been high 4 if i did. Having said that, i did go sub 25 min for 5km, albeit on a treadmill (lol) and remember thinking 22:30 was the next milestone to tackle, so 20 in a real world run was certainly not close to achievable by any means given my training experience so far. So i'm going to start aiming for that sub 25 real world first and if i figure out a few things maybe 22:30. 20 is probably dreaming. haha. no longer using a treadmill for running it's stupid, im 75% my knee problems started because i was doing a lot of treadmill running, it just leads to RSI because you're not giving yourself enough variety and it was the start of my knee flareup problems, i'd feel it as soon as i started using the treadmill and i guess that the warning sign i should have taken seriously. My reasoning back then was mo farah runs so many hundred miles on a TM so its' ok for me, yeah no bad reasoning. So lots of goal post revising but it means yeah, lets start with sub 25 and then 22:30, maybe along the way i'll be know what my actual limits are. To be honest running is one sport which benefits from being as light and lean as possible and if i got down to 77.5kg again i'm sure i could break 22:30 real world just by being as fit as i was in the summer when i would have weighed 90+kg. It's comparing apples and oranges but the organism is the same.
That said, of all people in here, your dedication and commitment in a training plan ( and consequentially the progress towards the goal ) has no match. March seems to soon to me but id guess you can get it in a year or so. If this non-smoking progress continues going that well, i'll race you to it lol. My goal is next October.
thank you! lets race. Stay off the smokes and i have work to do!