There are several types of work that remain to be done even though the night comes, a time usually used by many to rest.
For example work in hospital or become an aircraft pilot.
In recent years, more and more shops or department stores are open all night, to accommodate a 24-hour active community, who can only shop at night.
For those who work at night - with good planning - it is possible to stay up all night and sleep six to eight hours the next day.
In other words "normal" life but with the best body clock: working at night and sleeping during the day.
Although some people do not seem to matter with night work, a question worth asking is, what is the impact of night work on our bodies?
We know that the body secretes melatonin in the evening when we feel tired and melatonin it seems to deliver us, both physically and mentally, to get ready for bed.
For some people, changing the body clock-marked by a melatonin release time-is very workable.
This is evidenced by a study in Canada, which examined a group of police officers working night, which showed they issued melatonin during the day.
