Yep, I would love some advice on this. I can't keeo resorting to sleeping pills or large quantities of wine every time I run a decent pace over a distance of greater than 8 miles. For example, I ran the leeds half last sunday, had finished by 11:45am, and the body, though feeling knackered, never calmed down - even after a bottle of red wine in the evening!
So what should I do? Afternoon naps have been considered, but so far I have found them to make the problem worse than better, although I am willing to try again if enough people recommend it! And of course I could try running at dawn or something, but that won't be possible every time.