Remarkable Thing

A remarkable thing happened to me last night. I was in Spin Class and I had had a tiresome day at work; comptuer kept crashing, After Effects was being bitchy. I don't know what was up with that. It's usually quite stable. Anyway I went to Spin Class and it was an Inteval ride. That means that you do short intervals of high energy then you remove all of the resistance from the bike and try to lower your heart rate and recover. The last interval was a high resistance sprint and I just went for it.
For the first time, ever, I sweated drops off of my forehead and face onto the bike. I just don' t sweat like that, y'all. The instructors do. I really pushed myself and I think I found my 92% threshold, which was 174 beats a minute. I maintained that for about 20-30 seconds and had to back off the resistance. I could stick at 170 beats a minute OK, it was kickin my ass but I could keep doing it, so I think that is my 85% number.
It was an awesome thing to work like that, and an hour later I was still glowing from it.
I just wanted to share.