This one, I went for it. I really busted my butt today in a near all out effort on my 10k mtn bike course (that includes gravel roads and numerous hill climbs). I went out fast, up off the seat a lot. Beat my previous PR by about 1:35 min.
Conditions: dry, partly cloudy, 74º with occasional strong headwinds. I was hampered a bit by equipment, my seat slid down and my up shifter was sticking. I was also rude to a neighbor who stopped to tell me something from his car, I drove on by yelling, "Can't stop, doing a time trial!!"
New PR: 25:41
end of road - 5:14
turnaround - 13:12
Fasting today, blood work tomorrow. Should easily be below 148 tomorrow.