Originally Posted by Doctor Morbius
Quick question for skydive69 and my58vw if you would please indulge me...
When you guys are doing your Time Trials, how quickly do your heart rates get above 90%?
It depends. If I'm fatigued, it can take 10 minutes or so to get to 90%. If I'm really fatigued, I won't be able to sustain 90% at all. That's when I know it's time to take a rest day.
If I'm rested and reasonably warmed up, I can reach 90% in 2-3 minutes.