When it comes to curbing obesity, exercise doesnt have the same effect on African-American girls as white girls, a new study suggests.
According to research published in the Archives of Pediatrics & Adolescent Medicine, black girls are less responsive to the benefits of physical activity.
Researchers studied the exercise levels and caloric intake of a group of 1,148 adolescent girls at age 12. Two years later, lower levels of obesity correlated with higher levels of exercise in white girls. Surprisingly, the same wasnt true for black girls those who reported frequent physical activity were just as likely to be obese two years later as ones who rarely exercised.
The studys authors pointed to earlier research that helps explain why African-American girls might be at a disadvantage in the weight game, such as having lower metabolic rates and lower rates of fat oxidation than their white peers.
Other potential contributing factors are a higher daily caloric intake and more sedentary behaviors, like watching TV, the study says.
The authors note that promoting activity would have less impact in this high-risk population.
In other words, obesity campaigns directed at African-American girls should consider focusing less on exercise and more on controlling caloric intake.
Its not just physical activity, Ginny Ehrlich, chief executive of the Alliance for a Healthier Generation, told the Los Angeles Times newspaper.
Thats particularly important for African-American girls.
Ehrlich says she would be hesitant to share the findings with young black women because body image is already a really sensitive subject.
It creates yet another barrier to what might already feel like a struggle, she told the Times. When we talk with young people, we talk about healthy living eating better and moving more. Were trying to stay away from messaging around obesity.
But its a difficult message to avoid when it comes to black women, whose rate of obesity is the highest of any single ethnic or gender group, at 39.4%, according to the Times.
Measured by their body mass index (BMI), four in five black women are overweight.
Toni Carey, co-founder of the national running group Black Girls Run!, suggests that weight issues African-Americans face might have a deeper cultural context.
Carey told the Times that when she first began running, her mothers first reaction was, Thats something that black people dont do. She said, Your uterus is going to fall out and all sorts of things.
Young African-American girls might not exercise simply because its not something theyre used to seeing, Carey explained.
If you arent seeing your peers out there running and exercising or you hear them say, I dont want to mess up my hair, its more likely that youre not going to engage in that physical activity.
Carey added that some black families might stick to recipes that dont emphasize nutrition, or those strapped for cash wont be able to afford healthy ingredients If you have to eat off the dollar menu, thats what you do.
Black girls benefit from exercise less than whites: study - New York Daily News