Navigation Links
For obese teen girls, aerobic exercise may trump resistance training in health benefits
Date:11/7/2013

Bethesda, Md. (Nov. 7, 2013)Obesity has more than doubled in children and tripled in adolescents in the United States in the past 30 years, according to the Centers for Disease Control and Prevention. The growing rate of childhood obesity is a major health concern since overweight and obese youth are at increased risk of developing several diseases once considered reserved for adults. These new pediatric diseases include type-2 diabetes, metabolic syndrome, and non-alcoholic fatty liver disease, a condition in which fat builds up in the liver, potentially impairing its function over time. Although both diet and exercise have been considered as first lines to treat childhood obesity, SoJung Lee of the Children's Hospital of Pittsburgh, University of Pittsburgh School of Medicine and her colleagues recently showed that when obese adolescent boys increased physical activity alone, they improved several markers of health. These include reducing total fat, fat packed around organs in the abdomen (known as visceral fat, a risk factor for diabetes), and liver fat, and improving fitness of their heart and lungs.

To see if physical activity might work in the same way for obese adolescent girls, Lee and her colleagues performed a new study that compared the health effects of two different types of exerciseaerobic exercise and weight liftingover three months to remaining sedentary. Although their results show beneficial effects for both types of exercise, the researchers found that girls who performed aerobic exercise, but not weight lifting, had significant reductions in visceral fat and liver fat, as well as improvements in insulin sensitivity, another risk factor for diabetes that's linked with obesity.

The article is entitled "Aerobic Exercise But Not Resistance Exercise Reduces Intrahepatic Lipid Content and Visceral Fat and Improves Insulin Sensitivity in Obese Adolescent Girls". It appears in the online edition of the American Journal of Physiology-Endocrinology and Metabolism, published by the American Physiological Society.

Methodology

The researchers recruited 44 obese girls between 12 and 18 years old. They separated these volunteers into three groups. One group was assigned to perform 60 minutes of aerobic exercise three days a week for three months, either running on a treadmill or using an elliptical trainer. A second group was assigned to perform the same amount of resistance exercise, but instead participated in aerobic exercise program, doing 10 whole body resistance exercises using weight machines over the course of each hour-long session. A third group was asked not to participate in any structured physical activity program over the course of the study. Before the exercise programs began, all the study participants had a detailed physical exam, which included measuring their total fat, visceral fat, liver fat, and fat embedded in their muscles through various noninvasive means. The researchers also measured the volunteers' insulin sensitivity, a risk factor for diabetes, as well as basic health measures including weight and physical fitness.

Results

The researchers found that those in both exercise groups had less total fat and intramuscular fat by the end of the three-month study period compared to the sedentary group. However, the two exercise groups differed significantly in other measures. Overall, those in the aerobic exercise group lost visceral and liver fat and improved their insulin sensitivity, but those in the other groups didn't.

Importance of the Findings

These findings suggest that for teen girls, aerobic exercise might be superior to resistance exercise for cutting health risks associated with obesity. They also note that, anecdotally, girls in the aerobic exercise group seemed to enjoy their workouts more than those in the resistance exercise group, an opposite sentiment from the obese boys in their previous study.

"Therefore, given the superior improvements in metabolic health with aerobic exercise and the enjoyment factor, we propose that aerobic exercise may be a better mode of exercise for adolescent girls of this age group," they write.


'/>"/>

Contact: Donna Krupa
dkrupa@the-aps.org
American Physiological Society
Source:Eurekalert

Related biology news :

1. Obese stomachs tell us diets are doomed to fail
2. Obese dads pass on predisposition to obesity and metabolic disorders to their kids
3. Food contaminants worsen metabolic problems in obese mice
4. People with a disability more likely to be obese, have chronic illnesses
5. Obese male mice father offspring with higher levels of body fat
6. Eating fewer, larger meals may prove healthier for obese women
7. Obese dogs at risk of health condition experienced by humans
8. Obese moms give birth to heart healthier kids following bariatric surgery
9. Obese patients face higher radiation exposure from CT scans -- but new technology can help
10. Researchers unravel genetic mechanism of fatty liver disease in obese children
11. New study compares diets for weight management in obese children
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/21/2016)... VANCOUVER, British Columbia , June 21, 2016 ... been appointed to the new role of principal ... has been named the director of customer development. ... , NuData,s chief technical officer. The moves reflect ... development teams in response to high customer demand ...
(Date:6/9/2016)... -- Perkotek an innovation leader in attendance control systems is proud to announce the introduction ... to make sure the right employees are actually signing in, and to even control ... ... ... ...
(Date:6/2/2016)... 2016 The Department of Transport Management ... 44 million US Dollar project, for the , ... Personalization, Enrolment, and IT Infrastructure , to ... and implementation of Identity Management Solutions. Numerous renowned international vendors ... Decatur was selected for the most compliant and ...
Breaking Biology News(10 mins):
(Date:6/23/2016)... ... 2016 , ... Mosio, a leader in clinical research patient ... and Retention Tips.” Partnering with experienced clinical research professionals, Mosio revisits the hurdle ... and strategies for clinical researchers. , “The landscape of how patients receive and ...
(Date:6/23/2016)... , June 23, 2016 Houston ... with the Cy-Fair Sports Association to serve as ... the agreement, Houston Methodist Willowbrook will provide sponsorship ... and connectivity with association coaches, volunteers, athletes and ... with the Cy-Fair Sports Association and to bring ...
(Date:6/23/2016)... ... June 23, 2016 , ... Supplyframe, the Industry Network ... Supplyframe Design Lab . Located in Pasadena, Calif., the Design Lab’s mission is ... projects are designed, built and brought to market. , The Design Lab is ...
(Date:6/23/2016)... 23, 2016 Andrew ... http://doi.org/10.17925/OHR.2016.12.01.22 Published recently in ... journal from touchONCOLOGY, Andrew D Zelenetz , ... cancer care is placing an increasing burden on ... biologic therapies. With the patents on many biologics ...
Breaking Biology Technology: