social attitudes – in Western culture, keeping active is valued more than sleep.An over-aroused brain is less able to fall asleep. vicious circle – insufficient sleep causes a teenager’s brain to become more active.In the evening, lights from televisions, mobile phones and computers can prevent adequate production of melatonin, the brain chemical (neurotransmitter) responsible for sleep light exposure – light cues the brain to stay awake.leisure activities – the lure of stimulating entertainment such as television, the internet and computer gaming can keep a teenager out of bed.hectic after-school schedule – homework, sport, part-time work and social commitments can cut into a teenager’s sleeping time.Teens who put down their smart-phones an hour before bed gain an extra 21 minutes sleep a night External Link, (that's one hour and 45 minutes over the school week) according to a study External Link by Vic Health and the Sleep Health Foundation using screen based devices – smart phones and other devices used around bed time reduce sleep time. ![]() This nightly ‘sleep debt’ leads to chronic sleep deprivation Yet, while the teenager falls asleep later, early school starts don’t allow them to sleep in.
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