Post from ediets.com

Health and Diet
Anybody who’s ever worked the night shift knows how difficult maintaining healthy eating habits can be. Late shift hospital employees tend to gain more weight and exercise less than their daytime counterparts. Plan your meals so you avoid the vending machines. Eat the same way you would if you were working daytime hours. Have breakfast before work and dinner at the end of your shift. Make time to exercise.

Fitness
If exercise and a healthy diet haven’t trimmed your abdominal fat, add stress reduction to your daily routine. Studies have shown that high levels of cortisol – a stress hormone - contribute to fat on your midsection. To decrease the stress hormone, practice stress reduction techniques, get plenty of sleep and avoid smoking and alcohol consumption.