I probably overtrained last week... I couldn't do any fast running (tried), I had constant fatigue, etc. The heat doesn't help... Anyway, I skipped the second half of the week and as of yesterday (Monday), I restarted the week. I'm not sure I can maintain this kind of running. I already forgot how hot the summer is here. Last night I went to run at 9pm. The sun was down, and by the time I finished, it was pitch dark of course. Guess what the temperature was. 90 degrees. now wonder it was hard. (Nevertheless, I did 10 miles at 7:44/mile.)