How does shift work affect sleep?
Generally, the body is programmed to sleep best overnight and to be most alert during the day. Shift work isn’t easy because it involves working against your body’s natural rhythm. You need to be active and alert at night when your body is designed to sleep — and need to sleep in the day when you’re wired to be awake.
Working at night or irregular shifts can keep you from getting the regular sleep time that most daytime workers take for granted. ‘Research has found that shift workers have 1-2 hours less sleep on average per 24 hours than non-shift workers.’