Sleeping less than 8 hours a night
may be linked to weight gain in teens,
shows a new study presented at
CHEST 2011, the 77th annual meeting
of the American College of Chest
Physicians (ACCP) . Furthermore,
obesity was linked to short sleep
duration in teen males, with the
fewest hours slept linked to the
highest BMI levels.
"Sleep is food for the brain. When
teens do not get enough sleep, they
fall asleep in class, struggle to
concentrate, look and feel stressed,
get sick more often, and do not meet
their obligations due to tiredness ,"
said study author Lata Casturi, MA,
RPSGT, Baylor College of Medicine
Sleep Center in Houston, TX. "Teens
who sleep fewer than eight hours may
also consume more calories than
those who sleep more than eight
hours. Therefore, they have a higher
risk for obesity and associated health
problems, including high blood
pressure , heart disease, and stroke."
Ms. Casturi and colleagues, including
coauthor Anita Rao, presently a 10th
grader at Dawson High School in
Pearland, TX, surveyed 255 teens (108
males and 147 females) in high school
to obtain self- reported measures of
height and weight (used for BMI
calculation) and both weekday and
weekend quantity of sleep. Among
males, results indicated the average
sleep time on weekdays was 6 hours
32 minutes and on weekends 9 hours
10 minutes. Among females, the
average weekday sleep time was 6
hours 30 minutes and the average
weekend sleep duration was 9 hours
22 minutes. Teen males who slept 7
hours or less on weekdays had an
average BMI that was 3.8 percent
higher than those who slept more
than 7 hours. Likewise, teen females
who slept 7 hours or less had a BMI
that was 4.7 percent higher than
females who got more than 7 hours
of sleep per weekday.
But how does lack of sleep really
affect weight gain? According to
researchers, hormones leptin and
ghrelin work in a "checks and
balances" system to control feelings of
hunger and fullness. Ghrelin, which is
produced in the gastrointestinal tract,
stimulates appetite, while leptin,
produced in fat cells, sends a signal to
the brain when you are full. "When
you don't get enough sleep, it drives
leptin levels down, which means you
don't feel as satisfied after you eat.
Lack of sleep also causes ghrelin levels
to rise, which means your appetite is
stimulated, so you want more food,"
said co-author Radha Rao, MD,
DeBakey VA Medical Center, Houston,
TX. "The two combined, can set the
stage for overeating, which in turn
may lead to weight gain."
Furthermore, after adjusting for
potential cofounders, short sleep
duration (<8 hours) was associated
with obesity in male teens. A negative
correlation also was found between
weekday sleep duration and obesity in
males, with the fewest hours of
weekday sleep associated with the
highest BMI. There was no evident
correlation between obesity and
weekday sleep hours in teen females.
The researchers believe the sex-
related difference in sleep and weight
gain may be due to the differences in
body composition during puberty.
"Males and females experience
differential growth rates and hormone
secretion during puberty. The sleep
factors that impact metabolism may
increase weight gain differently in the
two sexes," explained Ms. Casturi.
In addition to weight gain, lack of
sleep during teenage years can result
in poor sleep habits that continue into
adulthood and result in long-term
health consequences.
"Sleep promotes growth in children
and adolescents and strengthens the
immune and nervous systems. Hence,
sleep deprivation early in life may
cause the youngsters to suffer from a
lifetime of irreversible higher health
risks," said Anita Rao. Researchers
recommend that parents educate
teens about good sleep habits early in
life, which include setting a regular
sleep schedule, turning off
technological devices at night, and
avoiding caffeine and exercise at
bedtime.
"Sleep deprivation can have an
immediate impact on our physical
performance and cognitive function,
but can also lead to long term health
problems, including cardiovascular
and respiratory conditions," said
Suhail Raoof, MBBS, FCCP, President of
the American College of Chest
Physicians. "Developing good sleep
habits in adolescence may help to
reduce the risk of related health
conditions later in life."
may be linked to weight gain in teens,
shows a new study presented at
CHEST 2011, the 77th annual meeting
of the American College of Chest
Physicians (ACCP) . Furthermore,
obesity was linked to short sleep
duration in teen males, with the
fewest hours slept linked to the
highest BMI levels.
"Sleep is food for the brain. When
teens do not get enough sleep, they
fall asleep in class, struggle to
concentrate, look and feel stressed,
get sick more often, and do not meet
their obligations due to tiredness ,"
said study author Lata Casturi, MA,
RPSGT, Baylor College of Medicine
Sleep Center in Houston, TX. "Teens
who sleep fewer than eight hours may
also consume more calories than
those who sleep more than eight
hours. Therefore, they have a higher
risk for obesity and associated health
problems, including high blood
pressure , heart disease, and stroke."
Ms. Casturi and colleagues, including
coauthor Anita Rao, presently a 10th
grader at Dawson High School in
Pearland, TX, surveyed 255 teens (108
males and 147 females) in high school
to obtain self- reported measures of
height and weight (used for BMI
calculation) and both weekday and
weekend quantity of sleep. Among
males, results indicated the average
sleep time on weekdays was 6 hours
32 minutes and on weekends 9 hours
10 minutes. Among females, the
average weekday sleep time was 6
hours 30 minutes and the average
weekend sleep duration was 9 hours
22 minutes. Teen males who slept 7
hours or less on weekdays had an
average BMI that was 3.8 percent
higher than those who slept more
than 7 hours. Likewise, teen females
who slept 7 hours or less had a BMI
that was 4.7 percent higher than
females who got more than 7 hours
of sleep per weekday.
But how does lack of sleep really
affect weight gain? According to
researchers, hormones leptin and
ghrelin work in a "checks and
balances" system to control feelings of
hunger and fullness. Ghrelin, which is
produced in the gastrointestinal tract,
stimulates appetite, while leptin,
produced in fat cells, sends a signal to
the brain when you are full. "When
you don't get enough sleep, it drives
leptin levels down, which means you
don't feel as satisfied after you eat.
Lack of sleep also causes ghrelin levels
to rise, which means your appetite is
stimulated, so you want more food,"
said co-author Radha Rao, MD,
DeBakey VA Medical Center, Houston,
TX. "The two combined, can set the
stage for overeating, which in turn
may lead to weight gain."
Furthermore, after adjusting for
potential cofounders, short sleep
duration (<8 hours) was associated
with obesity in male teens. A negative
correlation also was found between
weekday sleep duration and obesity in
males, with the fewest hours of
weekday sleep associated with the
highest BMI. There was no evident
correlation between obesity and
weekday sleep hours in teen females.
The researchers believe the sex-
related difference in sleep and weight
gain may be due to the differences in
body composition during puberty.
"Males and females experience
differential growth rates and hormone
secretion during puberty. The sleep
factors that impact metabolism may
increase weight gain differently in the
two sexes," explained Ms. Casturi.
In addition to weight gain, lack of
sleep during teenage years can result
in poor sleep habits that continue into
adulthood and result in long-term
health consequences.
"Sleep promotes growth in children
and adolescents and strengthens the
immune and nervous systems. Hence,
sleep deprivation early in life may
cause the youngsters to suffer from a
lifetime of irreversible higher health
risks," said Anita Rao. Researchers
recommend that parents educate
teens about good sleep habits early in
life, which include setting a regular
sleep schedule, turning off
technological devices at night, and
avoiding caffeine and exercise at
bedtime.
"Sleep deprivation can have an
immediate impact on our physical
performance and cognitive function,
but can also lead to long term health
problems, including cardiovascular
and respiratory conditions," said
Suhail Raoof, MBBS, FCCP, President of
the American College of Chest
Physicians. "Developing good sleep
habits in adolescence may help to
reduce the risk of related health
conditions later in life."
Tidak ada komentar:
Posting Komentar