ISLAMABAD: A new study from Norway suggests that ch
ildren who undertake moderate to vigorous activity that leaves them breathless and sweaty are less likely to develop symptoms of depression.
The researchers from the Norwegian University of Science and Technology (NTNU) and NTNU Social Research, both in Trondheim, Norway report their findings in the journal Pediatrics.Ch
ildren with learning, conduct, anxiety, or attention disorders have a higher risk of depression, as do ch
ildren under stress or who experience loss, or whose family has a history of depression.
The new study is part of a project called Tidlig Trygg i Trondheim that is following the development and mental health of ch
ildren born in Trondheim.
Researchers looked at data obtained from following hundreds of ch
ildren over the course of 4 years in order to search for links between physical activity and symptoms of depression
Measures of physical activity came from accelerometers that the ch
ildren were asked to wear around their waists for 24 hours a day for 7 consecutive days, a
nd only remove them when bathing or showering.
Measures of the ch
ildren’s mental health were assessed from structured interviews conducted with parents.
The team found that ch
ildren who were physically active at age 6 and 8 years were less likely to have symptoms of depression 2 years later.
“This is important to know, because it may suggest that physical activity can
be used to prevent and treat depression already in childhood,” says study author Silje Steinsbekk, associate professor in the department of psychology at NTNU.
“We also studied whether ch
ildren who have symptoms of depression are less physically active over time, but didn’t find that to be the case,” she adds.
Moderate to vigorous physical activity is defined as activity that is intense enough to make the person sweat and get out of breath.
Although the researchers did not examine the mechanisms through which moderate to vigorous physical activity might lower risk of depression, they cite a number of reasons that have been proposed in other investigations,
There is also evidence to suggest that “roughhousing” or “horseplay” can contribute to ch
ildren’s emotional and social development.
The authors note that while their study only found a small effect of physical activity on lower risk of depression, it was similar in size to those obtained by psychosocial intervention programs in ch
ildren and adolescents.
Given that nearly all ch
ildren can be targeted by efforts to increase their
amount of moderate to vigorous physical activity, “the gains at the population level might be substantial,” they note.
Researchers also suggest that there is now a need for randomized studies to test these findings and show whether increas
ing physical activity protects against depression.
Such studies are more robust than observational studies that follow a group, because they compare the effect of increas
ing physical activity in one group against the effect of not increasing it in another matched group rather like testing the effects of a drug in a clinical trial.
First author Tonje Zahl, NTNU said that “Being active, getting sweaty and roughhousing offer more than just physical health benefits. They also protect against depression.”