Originally Posted by
simonaway427
I don't know about you...but my heart rate is all over the map depending on my level of hydration, fatigue, heat/cold stress etc...
My view would be that if I was dehydrated, fatigued or not warmed up I shouldn't be starting the TT in the first place.
I would find it very difficult to pace a TT based on heart rate.
Pacing is difficult. But if one does not have a powermeter, HR and perceived exertion is all one has. And as far as I am concerned, HR is reasonably predictable. My LTHR tests at 162. When I was racing (last year, I haven't done any this season) my average HR in crits lasting around an hour was - 162. That's pretty decent evidence that the numbers are consistent and predictable.