DUG -- Apologies. No offense intended. My comment was more aimed at a cumulative lack of sleep over a long period of time, not related at all to just individual dayhikes. If I misinterpreted your post, I'm sorry.

Sneeze away, my friend.

If future generations are to remember us with gratitude rather than contempt, we must leave them more than the miracle of technology. We must leave them a glimpse of the world as it was in the beginning, not just after we got through with it.
- Lyndon Johnson, on signing the Wilderness Act into law (1964)