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Richard J. Bloomer, Bradford Cole and Kelsey H. Fisher-Wellman

High-kilocalorie feedings induce oxidative stress. Acute exercise has the potential to attenuate postprandial oxidative stress. No study has determined whether there are racial differences in postprandial oxidative stress with and without a preceding bout of acute exercise.

Purpose:

To investigate the impact of acute exercise on blood oxidative- stress biomarkers, triglycerides (TAG), and glucose in African American (AA) and White (W) women.

Methods:

10 AA (age 29 ± 3 yr, body-mass index [BMI] 31 ± 3 kg/m2) and 10 W (age 30 ± 2 yr, BMI 30 ± 3 kg/m2) women consumed a meal of 1.2 g of fat and carbohydrate and 0.25 g of protein per kilogram body mass, on 2 occasions—with and without a session of aerobic exercise 15 min preceding the meal (45 min cycling at 65% heart-rate reserve)—in a random-order crossover design. Blood samples were collected premeal (fasted), and at 1, 2, 4, and 6 hr postmeal and assayed for TAG, glucose, xanthine oxidase activity, hydrogen peroxide (H2O2), and malondialdehyde (MDA). Area under the curve (AUC) was calculated for each variable.

Results:

AUC was lower for AA compared with W for both the exercise and the no exercise conditions for H2O2, MDA, and TAG (p < .01). However, acute exercise had no effect on decreasing the AUC for any variable in either AA or W women (p > .05).

Conclusions:

Postprandial lipemia and oxidative stress are lower in AA than in W overweight/obese women. However, acute exercise, performed at the intensity and duration in the current study, does not influence postprandial lipemia or oxidative stress in AA or W women.

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Riley Galloway, Robert Booker and Scott Owens

and racial differences within each opportunity. Table 2 Average Minutes of MVPA and Sedentary Time by School School n SES Class size Recess/day PE/day MI/day MVPA/day Sedentary/day 1 15 Low 15 19.13 ± 3.27 12.73 ± 2.15 2.13 ± 0.35 15.31 ± 6.53 275.03 ± 18.82 2 20 Low 20 12.85 ± 2.01 8.55 ± 1.28 0

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Laura Azzarito and Melinda A. Solmon

Recently, national studies have reported on young people’s low level of participation in physical activity. Because the effect of gender and racial differences among youth participating in physical activity have not been sufficiently addressed, examining the social construction of the body in physical education can provide valuable insights. This study uses poststructuralism as a lens to investigate how students’ construction of meanings around the body varied by gender and race, and how bodily meanings related to students’ participation in physical education classes. The participants were 528 students from public high schools. An instrument was used to assess students’ racial and gendered construction of bodily meanings around specific discursive constructs. Results indicated that students’ meanings differ by race and gender, especially in regard to size, power, muscularity, and appearance. These findings suggest that bodily meanings were influential in students’ self-reported levels of participation in physical education classes.

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Adam J. Zemski, Shelley E. Keating, Elizabeth M. Broad and Gary J. Slater

predictor . Sportscience, 10 , 46 – 50 . Katzmarzyk , P.T. , Bray , G.A. , Greenway , F.L. , Johnson , W.D. , Newton , R.L. , Jr. , Ravussin , E. , … Bouchard , C. ( 2010 ). Racial differences in abdominal depot-specific adiposity in white and African American adults . American Journal

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Daniel M. Smith and Sarah E. Martiny

the threat condition but not in the “no threat” condition ( Hively & El-Alayli, 2014 ). In the latter study, women in the threat condition performed worse than women in control groups, who instead were told that the task was a test of psychological factors or would reveal racial differences ( Stone