Originally Posted by
mollusk
So how exactly is this number useful when training on anything other than something significantly uphill?
TSS/STS/LTS and TSB are general guidelines at best, to begin with. I live with a measure of ambiguity within them.
My CP is different on flats vs. hills, but the difference is more pronounced the longer the time window. So TSS is using a lot of z4-5-6-7 intervals that are much, much, much shorter than an hour. At 1min, my power is basically equal, I would guess. At 5min, the difference is probably 1/2 the 10% I see at one hour. So 5% translated through TSS algorithm that weighs the stuff that is most equal the most: meh - It's just not enough to worry about.