Moderate Tempo Run

So today I went out for my first run since I've been feeling better (total stomach flu = 1 week, still managed 2 runs!) - but I wasn't feeling particularly well today either due to residual effects of the stomach thing, or the Tylenol PM from last night. I did a short loop - 4.2 miles in 34 minutes, including 20 minutes 'fast' which I'm guessing covered about 2.7 miles - but that's a big time guess. I'm calling it a tempo run, because it fit the description of comfortably hard - although it's nowhere near where I want to be running those.