I'm always fall-asleep-at-my-desk tired.  My job can get boring from time to time, but I don't think I should be nodding off while I'm trying to work (or even browse the internet).  I'm trying to pinpoint what's making me so tired.  I don't smoke anymore so that's not it.  I am a very healthy eater.  I try to eat 3 meals and 2 snacks a day and I keep the portions small, so I don't think I'm malnourished or overfed.  Everywhere I look, I read that I should exercise, but I work out 3 to 4 times a week including 40 minutes of cardio per session. I guess I could use more sleep.  I go to bed at around 11 and wake up around 5:30...but plenty of people get less sleep and are fine.

 So why is it I'm nodding off?  Am I that bored?  Is it a combination of things in my lifestyle?  For example, do I need to be sleeping MORE because I exercise?  Or smoke a couple of cigarettes to break up my routine? 

I hate it...I feel like I'm doing everything I can do to lead a healthy lifestyle but I'm still suffering from lethargy. Anybody else have or had these troubles?