Published on August 10th, 2009 in THE PHILADELPHIA INQUIRER.
Kids' screen time is linked to development of hypertension
More time plopped in front of a screen - computer, video, video game, and, particularly, television - may raise the risk of elevated blood pressure in children, according to a new study.
The researchers tracked activity levels of 111 children ages 3 to 8 - 57 boys and 54 girls - round-the-clock for a week via measurements from an accelerometer worn over the right hip as well as parents' reports of the average time their child spent sitting or engaging in activities that ranged from painting to watching TV. They also considered age, sex, height, percentage of body fat, and other differences.
Excessive TV time and total screen time were linked to elevated blood pressure - a risk factor for cardiovascular disease and other health problems - even when possibly related measures, such as body fat, were separated from the analysis. Children who spent less than 30 minutes a day in front of a screen tended to have the lowest blood pressures, the researchers report in the August issue of Archives of Pediatrics and Adolescent Medicine. (The average was 90 minutes.)
Interestingly, the researchers did not find an association between blood pressure and sedentary behavior in general, leading them to suggest that factors specific to watching a screen - eating foods high in sugar, fat and salt, for example, or disruptive sleep patterns that have been associated with TV time - might play a role. - Heather J. Chin
Read the full article here.
From the colorful costumes of "Barney and Friends" to Saturday morning cartoons like "Dora the Explorer," television programming has long targeted the pre-preschool set in America. If we take a cue from France, however, that could change.
Last week, the High Audiovisual Council, France's broadcast authority, banned French channels from airing any TV shows with a target audience of children under three years old. The goal, as stated in the published ruling, is to "protect children under three from the [negative] effects of television."
"Television viewing hurts the development of children under three years old and poses a certain number of risks, encouraging passivity, slow language acquisition, over-excitedness, troubles with sleep and concentration as well as dependence on screens," wrote the council.
The ruling affects both French channels and cable operators that air foreign channels, specifically BabyFirstTV and BabyTV. BabyTV is owned by Rupert Murdoch's News Corp. and BabyFirstTV is owned by a Fox Entertainment affiliate, as well as Netherlands-based and LA-based investment groups.
Program development will be affected and French cable operators that air foreign channels with baby-targeted programs will now be required to air warning messages to parents, such as: "Watching television can slow the development of children under three, even when it involves channels aimed specifically at them."
While such baby-marketed products are touted as specially designed for parent-baby interactive viewing, critics argue that such specific channels are more often used as a babysitting tool.
In a June newspaper interview, France's minister for culture and communication, Christine Albanel, also urged parents not to use 24-hour channels as a sleep aid, deeming it actually counterproductive to a good night's sleep. Research shows that background noise and artificial light such as those from TVs impede the body's ability to wind down and rest.
Area medical professionals agree. Dr. Gary Emmett, director of hospital pediatrics at Thomas Jefferson University Hospital, said, "While watching TV is not always harmful, it is not always helpful." It also often has long-term effects on learning and physical health, since the time spent in front of the TV takes away from other activities.
"Reading is directly correlated to success in school, while watching TV, and other things that [doctors] regard as passive, is not ... and is counter-related," he said.
Research published this July in the journal Childhood Development has also highlighted the negative effects of background noise on a toddler's ability to concentrate and learn, instead fostering restlessness and distraction.
BabyFirstTV first aired in the United States in 2006 to much debate over the value of such programming towards the youngest and most undeveloped, impressionable segments of society. The American Academy of Pediatrics recommends that children below age three should have zero hours of TV watching. However, a 2003 Kaiser Family Foundation study found that two-thirds of children under age six live in a home where the TV is on half the time, while one-third of children live in a home where it is on "most of the time" or "always."
According to Dr. Emmett, parents can help by fostering active playtime with other children and by reading storybooks with them. There is also a Philadelphia-area branch of the national charity NEMOURS that calls for a "two-one-five-zero" program: two hours or less of screen time a day, one hour of running or swift walking, five portions of fruit and vegetables a day and no sweets or sugary drinks.
Heather J. Chin can be reached at hchin@thebulletin.us