I've been following Joe Friel on Twitter for a few days now and every damn day he says pretty much the same thing.
"Montrose to Crested Butte, CO. Long day in saddle. TSS 292."
At first it did not even realize he was using an acronym and them I'm like, what the hell does TSS mean? So I looked it up:
Training Stress Score (TSS) - The TSS represents a calculated number that takes into account the duration and intensity of a workout to arrive at a single score of the overall training load and physiological stress created by that session. One hour of functional threshold (as hard as you can go for one hour) = 100 Training Stress Score points.
Welcome to the new world. At one point you could just sort of rely on your breathing and how labored it was. Then came heart rate which was quickly eclipsed by power. And now there is TSS.
Shit. Soon you won't be able to exercise without toting along a CPU. Oh wait, that's already happening…
"How was your ride honey?"
"Well, my TSS was 255…"