In a study that sought to examine the impact of a 30-minute delay in school start time on adolescents' sleep, mood, and behavior, it was discovered that students reported significantly more satisfaction with sleep and experienced improved motivation. Daytime sleepiness, fatigue, and depressed mood were all reduced. Most health-related variables, including Health Center visits for fatigue-related complaints, and class attendance also improved. The results of this study support the potential benefits of adjusting school schedules to adolescents' sleep needs, circadian rhythm, and developmental stage.
Owens, J. A., Belon, K., Moss, P. (2010). Impact of delaying school start time on adolescent sleep, mood, and behavior.