Navigation Links
Exercise Controls Weight in White Girls Better Than in Black Girls: Study
Date:6/6/2012

By Kathleen Doheny
HealthDay Reporter

WEDNESDAY, June 6 (HealthDay News) -- Exercise appears less likely to prevent obesity among black teenage girls than their white peers, a new study shows.

British researchers who gauged the effect of exercise on more than 1,100 girls, aged 12 to 14, surmised that black teen girls may be less sensitive than white teen girls to the effects of physical activity to prevent obesity.

"Higher levels of physical activity were associated with lower risk of obesity among white girls but not among black girls," wrote study authors James White and Russell Jago.

This is of concern because obesity rates are increasing at a greater rate among black teen girls than other U.S. youths, putting them at greater risk for heart disease, according to background information in the study. Black American girls were 80 percent more likely than white girls to be overweight in 2007-2010, the U.S. Department of Health and Human Services' Office of Minority Health reported. And about four out of five black American women are overweight or obese.

"At present, we don't know whether these differences can be attributed to genetics," said White, a researcher at Cardiff University in Wales. While other studies have found black girls consume more calories than white girls, he said this study took those differences into account, suggesting there may be other reasons. "These may be genetic, but we don't really know," he said.

However, at least one expert believes the study results may reflect lifestyle differences, which can be addressed, not just genetics.

White and Jago, of the University of Bristol in England, evaluated data on girls who participated in the long-running National Heart, Lung, and Blood Institute Growth and Health Study.

The researchers were looking at factors associated with obesity and the development of heart disease risk factors.

For this study, published in the June issue of the Archives of Pediatric and Adolescent Medicine, the research team focused on 538 black girls and 610 white girls for whom they had data on physical activity, obesity and other measures.

The girls' overall level of physical activity was measured for three days with a device that could detect frequency of movement and speed. Their TV viewing hours, height, weight, body-mass index (BMI), percent of body fat and daily calorie intake were also recorded. BMI, a calculation based on height and weight, is a reference used to determine obesity.

At age 12, the activity levels were higher in white girls than in black girls. The black girls had a higher BMI and body fat percentage, and ate more calories daily. They also watched more TV: The median -- meaning half watched more, half watched less -- was 44.3 hours a week for black girls vs. 24.5 for white girls.

Median daily caloric intake was slightly higher for black girls -- 1,912 vs. 1,906 for white girls.

At 12 years of age, 14 percent of the black girls were obese, compared to 4.3 percent of the white girls. At 14 years, 15.6 percent of the black girls and 5.1 percent of the white girls were obese.

That no link was found between physical activity levels and obesity among black girls is consistent with other research showing that fat-burning rates in response to physical activity are lower in black girls during puberty and adulthood than in whites.

Lifestyle issues, rather than genetics, may partly explain the results, said Pete McCall, an exercise physiologist with the American Council on Exercise.

Noting that black girls watch much more TV than white girls, he said, "That would be one area to change." They could shut off the TV and get exercise, "but the neighborhood may not be conducive," he said.

Parent education and income might affect the results, too, McCall speculated. More than half the parents of white girls had a college degree, but fewer than one-quarter of the black girls' parents did. The incomes of white girls' parents were higher, too.

"College education and income levels [of the parents] can play a role in the amount of physical activity a person gets," he added.

The authors noted that the black girls began menstruating earlier than the whites, which could also influence weight gain.

Encouraging black teen girls to exercise is still important, but different approaches may be needed to prevent obesity in black girls, the authors said.

"Our findings require replication before any real recommendations can be made," White said. "They do, however, suggest that black girls should be particularly attentive in controlling their caloric intake."

More information

To learn more about obesity and black Americans, visit the U.S. Office of Minority Health.

SOURCES: Pete McCall, exercise physiologist, American Council on Exercise, San Diego; James White, Ph.D., researcher, University of Bristol, England; June 2012, Archives of Pediatric and Adolescent Medicine


'/>"/>
Copyright©2010 ScoutNews,LLC.
All rights reserved  

Related medicine news :

1. How does exercise affect nerve pain?
2. Exercise and a healthy diet of fruits and vegetables extends life expectancy in women in their 70s
3. Cyber exercise partners help you go the distance
4. Vigorous Exercise Might Keep Psoriasis at Bay
5. Exercise May Boost Survival in Breast, Colon Cancer Patients
6. Exercise Can Help Fight Heart Failure
7. Exercise Plus Computer Time May Boost Seniors Brains
8. Exercise Twice a Day Vital for Your Dogs Health, Expert Says
9. Guidelines say diet, exercise, weight control improve odds after cancer diagnosis
10. A comparison of 2 home exercises to treat vertigo
11. Exercise helps smokers to quit smoking, to remain smoke-free and to reduce the risk of death
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Exercise Controls Weight in White Girls Better Than in Black Girls: Study
(Date:5/25/2016)... ... 25, 2016 , ... First Choice Emergency Room , the largest network ... as the Medical Director of its new DeSoto facility. , “We are pleased ... location,” said Dr. James M. Muzzarelli, Executive Medical Director of First Choice Emergency Room. ...
(Date:5/25/2016)... ... May 25, 2016 , ... American Spine ... minimally invasive, endoscopic spine surgeries in the Montgomery County, Howard County and Washington, ... the Germantown office of American Spine every Monday. He will also perform surgeries ...
(Date:5/24/2016)... ... May 24, 2016 , ... BTC Media, ... blockchain event, Distributed: Health, to be held in Nashville, Tennessee on September 7, ... A 24-hour Hackathon preceding the event will host teams from around the world, ...
(Date:5/24/2016)... ... May 24, 2016 , ... Fire Door Solutions, ... one resource, from start to finish, for Life Safety compliance. These expanded ... surveys requested by the Joint Commission, and fire stopping reviews, inspections, and repairs. ...
(Date:5/24/2016)... , ... May 24, 2016 , ... Jericho Project has ... this role she will be responsible for fundraising and communications for the nationally-acclaimed nonprofit, ... impact of Jericho Project working to end homelessness at its roots. , “LaToya ...
Breaking Medicine News(10 mins):
(Date:5/24/2016)... Niederländische Chirurgen haben eine ... Ärzten erlaubt, ihre Expertise weltweit zu teilen und ... Streaming mit einer Instant-Messaging-Funktion und der Möglichkeit, in ... Europa, Afrika, Asien und den USA ... registriert. Information und Weiterbildung   ...
(Date:5/24/2016)... ARANZ Medical  Ltd a specialist ... has been named the Coretex Hi-Tech Emerging Company of the ... Dr Bruce Davey , CEO of ARANZ Medical says, ... good to be recognised for the work we are doing ... in 35 countries around the world from Sub-Saharan Africa through ...
(Date:5/24/2016)... 2016 Los innovadores de ... mundo, introduce catéteres para la intervención de extremidades ... compañía global especializada en el suministro de soluciones ... cartera incluyendo productos para tratar la enfermedad arterial ... son los dispositivos de primera entrada de la ...
Breaking Medicine Technology: