In fact, many adolescents are getting as little as 7 hours of sleep per night resulting in chronic sleep loss. (familysleepinstitute.com)
Such chronic sleep loss may eventually interfere with a person's performance on tasks that require focus, becoming particularly noticeable at nighttime. (articles.mercola.com)
Some people living near wind turbines complain of chronic sleep loss, headaches and other symptoms. (science.howstuffworks.com)