I do wonder, if trolls are here to troll or just they don't understand actually what threshold is?
Either way, I guess from his recent racing sirpoc LTHR is likely in the 177-179 range? Recent HM as a guide. He sometimes touches this maybe by the end of the last rep for a minute or two, but certainly not always
Look look at his HR in 10*1k WAY above threshold classic 'pace' at the weekend , but I think HR topped out around 175 by rep 10. It's all about pace versus duration. I think that's what he has worked out as almost a cheat code to keep a remarkable run of training just keeping going over and over again. This seems to have been adapted for himself, combining a lot of different methods through trial and error.
If you take his Vdot threshold, that's around 3:19-3:20. Yet he can easily complete 10*1k in 3:12-13 average without probably ever going over threshold. It would be nice to hear from him with regards as to how easy this felt or how many more reps he could do on top of the 10? IMO this would be a good clue as to how hard this really is for him.
What stuck me was the explanation I think he wrote on Strava. This is MORE aggressive than doubles, but still on the cautious side. You are trying to get as much as you can out on just a single session as opposed to doubles, but also making sure you don't get burnt, playing with fire and that you can still run and complete a workout again in 48 hours. It's a highwire act that requires real discipline and understanding of what the bigger picture is.
I imagineas you get way more experienced training like this, you can get closer to looking over the edge into the abyss but never falling into that slope of no return. Whereas starting out, it makes sense to just very much stay on the cautious side until you get a grip and handle on things.
I was incredibly sceptical myself of this approach and thread earlier in the year but having seen genuine actual improvement , especially in the 5k-HM range for so many people, it's become hard to ignore to be honest. If you aren't considering this at some point as an older time crunched runner, you are probably on the wrong path. Does it work for everyone? Clearly not. As a blanket approach across the board? I'm not sure there is likely something that would suit or benefit a larger percentage of runners out there at the moment.