Whew! Tempo running is much harder than my normal running speed. Today I did a 10 minute jog, 3 minute tempo run, and 10 minute jog (of which I walked the first 2). To be fair, my ENTIRE 3 minute tempo run just happened to be on a long and steep hill. Yikes! Also, I think I may have been doing more of a fast run than a tempo run. Either way, I'm tired, but mostly pleased. My next run is a 30-minute steady jog. No biggie. P.S. Perfect running weather today! How awesome!