[40.Older People Need Less Sleep?]
The popular notion
that older people need less sleep than younger adults
is a myth,
scientists said yesterday.
While elderly people tend to sleep for fewer hours
than they did when they were younger,
this has a negative effect on their brain's performance
and they would benefit from getting more,
according to research.
Sean Drummond,
a psychiatrist at the University of California, San Diego,
said that older people
are more likely to suffer from broken sleep,
while younger people are better at
sleeping efficiently straight through the night.
More sleep in old age, however,
is associated with better health,
and most older people would feel better and more alert
if they slept for longer periods, he said.
"The ability to sleep in one chunk overnight
goes down as we age
but the amount of sleep we need to function well
does not change,"
Dr Drummond told the American Association
for the Advancement of Science conference in San Diego.
"It's definitely a myth that older people need less sleep.
The more healthy an older adult is,
the more they sleep like they did when they were younger.
Our data suggests that older adults
would benefit from continuing
to get as much sleep as they did in their 30s.
That's different from person to person,
but the amount of sleep we had at 35
is probably the same amount as we need at 75."