I suddenly have amazing stamina. I've been riding a bunch recently and yet I'm cooking along at a pretty good clip. My legs definitely are beat but they seem to complain less.
I used up a good amount of energy trying to keep up with San Jose's lightly used Light Rail. You see, the LR has priority w/r/t traffic lights and shadowing the LR allows you to zoom through more signals. Unfortunately my timing was off and I managed to hit just about every traffic light anyway. The LR won out today.
It's going to be in the 100s today. I'm looking forward to the hot, hot, hot ride home.