Shifts (Score 1)

I'm currently working on a helpdesk a startup company that provides 24/7 service. I literally change schedules each week between first, second, and third shift. I often find that when going back to first shift, I'm still on my "work during the night, sleep during the day" sleep schedule and have a lot of difficulty staying awake during the middle and towards the end of my shift. I couldn't say whether I would have this problem if my schedule was more consistent, but I suspect that I wouldn't.