英国每日电讯:研究人员称,对于那些夜里不能睡安慰觉的人来说,比如说新妈妈们或者上夜班的护士,尽管他们每天的睡眠时间足够,但睡眠的效果相当于他们只睡了四个小时.

The Telegraph: Being woken up regularly during the night can leave parents and on-call workers feeling as sleep deprived as if they had only four hours rest a night.

Researcher discovered that being pulled from a deep slumber by a crying baby or a frantic emergency call, causes the same confusion, depression and fatigue as being severely sleep-deprived.

It means that even when people get a total of seven hours sleep a night, being forced to wake up for regular 15 minute feeds, or consultations, will leave them feeling like they had just four hours rest.