Girl Sleeping

Ten hours of sleep a night can increase the span of life because it is a major factor in rejuvenating the body and activating the immune system.
Quoting a study BBC reported that the people who reach 100 are three times more likely to spend at least 10 hours a night in bed.

Talking to BBC, Dr Danan Gu, of Portland State University in Oregon, said that having a good sleep of 10 hours a day or an average daily sleep time of about seven-and- a-half hours including naps may increase the time span of life.

He said that when humans sleep, their cells regenerate and they also remove toxins and activate immune system cells.