Lactate Threshold Training

Thanks Pindaman.

Do u remember how kitkats program could be adjusted to 800m?
I remember there was some info about it, but the tread is so huge and I could not find it.

I guess its just to add some volume to the interval sessions and reduce the speed abit?

What is actually the benefit/key of kit kats program?
Is it the weekly structure of 2 “hard”, 1 easy, “3 hard” 1 easy?
The type of sessions?
The variation from week to week?