Abstract In the early 1990s, medical research found that teenagers have biologically
different sleep and wake patterns than the preadolescent or adult population. On the basis of
that information, in 1997 the seven comprehensive high schools in the Minneapolis Public ...

Methods In April of Year 1 (1998), a total of 9,966 students from grades 6 to 12, who
obtained parental permission, filled out questionnaires concerning their sleep habits on
school and nonschool nights and various aspects of their daytime functioning. Specifically, ...

With the onset of adolescence, teenagers require 9.2 hr of sleep and experience a delay in
the timing of sleep. In the “real world” with early school start times, however, they report less
sleep, striking differences between their school-weekend sleep schedules, and significant ...

ABSTRACT Background: High school students are reported to be excessively sleepy,
resulting in decreased academic performance, increased psycho-social problems and
increased risk of morbidity and mortality from accidents. Early school start times have ...

Sleep timing undergoes profound changes during adolescence, often resulting in
inadequate sleep duration. The present study examines the relationship of sleep duration
with positive attitude toward life and academic achievement in a sample of 2716 ...

Abstract The American Academy of Pediatrics recognizes insufficient sleep in adolescents
as an important public health issue that significantly affects the health and safety, as well as
the academic success, of our nation's middle and high school students. Although a ...

Research from JAMA Pediatrics — Impact of Delaying School Start
Time on Adolescent Sleep, Mood, and Behavior.

Abstract The authors have integrated the major findings on the sleep–wake cycle and its
performance correlates in adolescents. Basic research shows that lack of synchronicity
between early school start times and the circadian rhythm of adolescents (and the sleep ...

Research suggests that teens require more than 9 hours of sleep per night in order to
function optimally. 1 Insufficient sleep in teens is common2 and could eventuate in
excessive sleepiness3 and such onerous consequences as academic difficulties, ...

The results from this three-year research study, conducted with over 9,000 students in eight
public high schools in three states, reveal that high schools that start at 8: 30 AM or later
allow for more than 60% of students to obtain at least eight hours of sleep per school night ...