The duration and type of sleep that we want to change with age. Age: not just a single factor as a judge. Each person has different needs. Some more and some less than his or her own needs. The duration of sleep may be less important to the quality of sleep. The need to sleep each day, it can change from day to day, depending on the circumstances facing. Teens generally need about 9 hours of sleep per night. They are usually not sufficient. It is not uncommon. For teenagers who want to sleep late and wake up early to complain about going to school. Natural sleep pattern changes in teenagers To sleep later than ever in the evenings for teenagers feel sleepy now, very late at night. If teenagers use some devices before a computer or mobile phone, it will make you have fun with them, although they advertise it is best not to have a tv or computer in your bedroom, teen. Trying to sleep and wake up as a teen, old time every day to help teens get the sleep they need.