Today was the first workout in a loooong time where I thought I was going to throw up, pass out, and/or die.
I went through a set of Tabata intervals for the first time, today. I did four intervals. I wanted to do six. I'm working up to eight (assuming I ever try this insanity again). And by the end of the second one, my body was trying so hard to slow down, I didn't think I could do a third, let alone a fourth.
But the workout only took twenty minutes, and by the end my throat felt raw (you know where you feel something like the metallic taste of blood) and I wanted to drape myself over my handlebars like a wet transition towel. I had to force myself to finish up the last five minutes of my cool down, because I wanted so badly to hop off the bike and curl up in the fetal position on the floor.
In short, it was an awesome workout.