The sleep issue is an odd one to me as I've always found that vigorous exercise gets rid of lack of sleep yuckiness. There's been many a climb where we've gotten a 2 or 3:00 start, and sure, you start out feeling like your head is full of cotton, etc., but over the course of an hour or so, everything is fine. I've always assumed that exercise clears whatever toxins, etc. are causing that feeling. Perhaps it is an individualist thing.
I will say that the next night's sleep is usually outstanding!
