I started a job on Tuesday that is both technical in some respects, but physical in others. I'm part of a project to stage 3,000 PCs for deployment, and I spend my days surrounded by HP boxes and lifting PCs from one area to the next. This is my first physically demanding job, and today (Saturday) I had trouble bringing up a small load of laundry from the basement. At work, when I lift PCs off the floor, I lift with my legs, but taking a PC off the workbench to put back into the box, I have to lift from the waist. Should my nutrition requirements be changing? (keep in mind, I have no fridge at work) Any suggestions to keep from blowing my lower back out?