Since they're having success at triathlon + ironman triathlon, is there some info out there on how they'd train for the marathon?
I've always had difficulty doing any 'normal' training schedule -- it always leads to overtraining, even if I'm carefully staying within the paces set out for me. So the idea that these sessions can be effective even though they're relatively light is really appealing to me. I wouldn't expect to jump into 4x threshold sessions a week, but starting with 2 and building up to 3 and then maybe someday 4 sounds enticing. And I think one obvious change for marathoning is to drop the hill workout and do a long run instead.
So maybe something like doing the 5x6min session on Tuesday and the 10x3min session on Thursday and an easy 120min run on Saturday? And once that feels very comfortable, think about adding a 2nd session on Tues/Thurs? And then I'd still want a few weeks where the long run has some marathon pace in it, so probably dropping some threshold sessions the following week to recover from that.
Anyone else wanna take a stab at how they'd use these threshold sessions as the basis for a marathon training plan?