We all know that sleep is [1] to your [2] and mental health. But, how can we know whether we're [3] sleeping well? For people who work during the night, their sleep probably does not look [4] like other peoples' sleep. It can be hard to measure your sleep patterns against those of the people around you.
On [5] , adults should optimally receive between seven and nine hours of sleep each night, but those needs vary [6] . For example, some people feel best with eight hours of sleep, while others do well with six to seven hours at night and daytime napping. Some people feel okay when their sleep schedule changes, while others feel very affected by a new schedule or even one night of insufficient sleep.