Since I'm not managing to run often enough lately I did the first run of w5 again. It was fine (really pleased with my progress☺) & I think I'll do the second run next time (tomorrow). The thing is, I have noticed on the last few runs that I am left feeling rather low for a few hours afterwards - the exercise seems to be causing my mood to drop, rather than be improved by the endorphins, etc. I am eating and drinking well. Does anyone else experience this, or heard of it happening?