I really don’t understand the way my alertness cycles work.  I also can’t decide if it is a question of interest…

I try to get up every weekday morning at 6am to shower and have breakfast before leaving a little past 7:30.  This rarely happens anymore.

Work lasts from 9a to a little after 5:30p, most days.  commuting by subway generally takes a little over an hour each way. 

Recently, I’ve also tried to make it to the gym for at least 30mins every weekday evening, and I try to get some WoW on, as well as wedding details, and some website projects.  very busy.

Recently, I’m awake and aware as soon as I get home, and can be up and doing things until 2 in the morning with little difficulty.  Then I get to work the next day, and I’m tired, sluggish, and can’t focus all day, but as soon as I get home again I’m alert and ready to go.

What is going on?  Maybe I’ll try to bring some work home and see how that goes.  Would probably provide an answer to the alert-cycle vs. interest-cycle question…