According to the VOA Special English Health Report, written by Caty Weaver, when the persons sleep an amount enough hour according to their age, and anyway this amount hours are a bedtime routine, in consequence they get better results in different field of their development.

“ Parents know a nightly bedtime is not always easy to enforce. But researchers say bedtime rules may improve a child's development.”

Researchers say that the child go to bed around the same time every night and early bedtime, they get better results in score (higher score) and in the develop of the abilities in language, reading, and math skills. Beside, a study in the journal Sleep Medicine reveals that when the children go to bed after nine o`clock, they delayed more to fall asleep and slept less.

Other study says that the adults should slept between seven and eight hours each night; while the teenagers and young adults should slept nine hours or more. Like this, who make sport can to improve their performance ; for example the sporty persons run faster. They “should be part of an athlete's training program because reduce a sleep debt”