I'm not normally so tired after, what is for me, a reasonably short long run. And it was on the flat too.

I just think that my whole body is tired and needs a good rest, and yesterday I was just a bit flat.

So I'll take it easy for the next couple of weeks and hopefully get my energy back again.

... and I wouldn't call it euphoria so much as relief that it is over with and I can lie down and sleep (after a beer of course) hehe