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D-40 Free Communication/Poster - Physical Activity Interventions in Adults - Part II Thursday, June 2, 2016, 1: 00 PM - 6: 00 PM Room: Exhibit Hall A/B

Influence of a Physical Activity Intervention on Perceived Barriers and Benefits in Women

2117 Board #269 June 2, 3

30 PM - 5

00 PM

Lundberg, Kathryn E.; Walch, Tanis J.; Fitzgerald, John S.; Whitehead, James R. FACSM

Author Information
Medicine & Science in Sports & Exercise: May 2016 - Volume 48 - Issue 5S - p 596
doi: 10.1249/01.mss.0000486790.66645.b2
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Young adults face an abundance of behavior choices when entering college. One important decision is to regularly participate in physical activity. Common barriers to physical activity may hinder an individual’s decision to make healthy behavior choices, such as physical activity.

PURPOSE: To examine the impact of a women’s physical activity intervention on perceived benefits and barriers, body composition, and energy expenditure.

METHODS: Non-randomized experimental design was used between two groups (n=50) of college-aged women. The first group was enrolled in one of two one-credit physical activity courses (intervention; n=15, age=21.93 years). The second group was enrolled in a freshman general requirement course (control; n=35, age=19.8 years). The intervention included a 7-week physical activity program (150 minutes/week) developed based on the Health Belief Model, which targeted perceived barriers and benefits to exercise. Each session highlighted behavior change strategies targeting barriers and benefits, followed by a physical activity session. Pretest and posttest measurements included: Exercise Benefits/Barriers Scale to assess barriers and benefits to physical activity, BODPOD to measure body composition, and accelerometry to estimate daily energy expenditure (SenseWear armband). ANCOVA was used to evaluate differences between groups after the intervention (SPSS).

RESULTS: Intervention women increased fat-free mass (0.49kg) compared to a loss of fat-free mass in control (-2.5kg; p=0.03). Physical performance, a benefit subscale to exercise, also showed a trend (control=−0.07; intervention= 0.13, p= 0.07). There was no significant difference in energy expenditure between groups.

CONCLUSIONS: The increase in fat-free mass is a significant finding when looking at energy balance and weight management over time. Resting metabolic rate is strongly associated with fat-free mass; accounting for 70% of resting metabolic rate. A trending increase in physical performance suggests a physical activity intervention may be effective for preventing sedentary behavior and promoting physical activity in college-age populations. Policies that mandate a physical activity course for freshman students may be one way to protect against chronic disease and overweight/obesity.

© 2016 American College of Sports Medicine