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2009-07-23 10:03:31
Researchers have confirmed what parents have long believed - running around in
the day means your child may well fall asleep faster at night.
But the study of 500 children provides a figure: for every hour they sit, they
need three minutes longer to nod off.
Interestingly, it was not relevant what the child did while they sat. TV was no
more detrimental than quietly reading.
And the Archives of Disease in Childhood found those who took longer to get to
sleep were no worse behaved.
Experts from Monash University in Melbourne and the University of Auckland
looked at 519 seven-year-olds.
The majority fell asleep within 45 minutes, and the average "sleep latency" -
the time it took - was 26 minutes.
Sleepyhead
Children who were very physically active during the day tended to take less
time to fall asleep, but the more prominent association was between being
sedentary and taking longer to drift off.
Those who fell asleep faster also tended to sleep for longer. There has been
much discussion about the impact of reduced sleep duration on children.
"As short sleep duration is associated with obesity and lower cognitive
performance, community emphasis on the importance of promoting healthy sleep in
children is vitally important," the researchers wrote.
Activity is not the be all and end all, and shouldn't be encouraged right
before bedtime
Mandy Gurney Sleep specialist
"This study emphasises the importance of physical activity for children, not
only for fitness, cardiovascular health and weight control, but also for
sleep."
They did not however find any evidence of bad behaviour, as measured by
professional charts, among those who took longer to fall asleep. Nor did they
find any significantly different sleep latencies for children who went to bed
after 9pm.
Mandy Gurney, founder of children's sleep clinic Millpond, said the research
was useful confirmation of the benefits of exercise for sleep as well as
fitness and weight.
"But activity is not the be all and end all, and shouldn't be encouraged right
before bedtime. What's essential is a routine wind-down hour, a quiet time
before bed. A warm bath, but no longer than 10 minutes, and then straight into
a darkened bedroom.
"That way you make the most of the the natural sleep trigger of the warm water,
and you can cap it all off with a bedtime story."