If you aren’t doing so well in school or your sport, maybe it’s because you aren’t getting enough sleep, according to a Straits Times story (Monday, January 5, 2009).

Apparently four out of five teenagers in Singapore aren’t sleeping enough.

Dr Lim Li Ling, director of the Sleep Disorder Unit – one assumes everyone sleeps quite well there – at the Singapore General Hospital, told the Straits Times: “When children don’t get enough sleep, the consequences are significant. It affects their learning and growth.”

According to Dr Lim, a lack of sleep stunts your height and can also cause emotional problems (which may explain your ’emo’ friend).

For those who are student athletes, the need for sleep is even more important to recharge after intense training sessions.

How much sleep is needed (by age):

7 years old – 10.5 hours
8 – 10.25
9 – 10
10 – 9.75
11 – 9.5
12 – 9.25
13 – 9.25
14 – 9
15 – 8.75
16 – 8.5
15 – 8.75
16 – 8.5
17 – 8.25
18 – 8.25

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