The incidence of morbid obesity (BMI ≥ 40 kgmˉ²) is increasing at an exponential rate. Currently, the most viable option for weight loss is bariatric surgery. Success following surgical procedure is guided by the individuals ability to make behavioral changes. A better understanding of the physical activity behavior of individuals who undergo bariatric surgery will enable the development of effective post-surgical exercise guidelines and interventions to enhance surgical weight loss outcomes. PURPOSE: To define the physical activity profile of subjects 2-5 years post bariatric surgery by examining the relationship between physical activity and weight loss. Additionally, this study examines the association between physical function, psychosocial correlates of physical activity, and weight loss. METHODS: Thirty-seven adults (percentage excess weight loss (%EWL) = 62.15 ±19.93, age = 50.76 ±9.99 years) participated. Subjects wore an activity monitor to measure their physical activity. Body height, weight, physical function, psychosocial variables of physical activity (self-efficacy, expected outcomes (benefits) and perceived barriers) and health related quality of life were measured. Assessment also included demographics, medical history, and dietary questionnaires. RESULTS: This study determined that subjects who have undergone bariatric surgery participated in 205.33 ±136.98 minutes per week of ≥ 3METs for ≥ 1 minute bouts. The average dropped to 47.56 ± 69.84 minutes per week when including only bouts of 10 continuous minutes or more. Physical activity was correlated with %EWL (r=0.47, p=<0.01) and self-efficacy (r=0.39, p<=0.02), but not with physical function, expected outcomes (benefits), perceived barriers, or HRQOL. Physical function was correlated with %EWL (p<0.05). CONCLUSIONS: The subjects activity level failed to meet standards that have been shown necessary for weight maintenance. Those subjects that were more confident in their ability to exercise were more active and had more success losing weight. These findings suggest that behavioral interventions should include a strategy to address self-efficacy. The disparity between physical activity and physical function would suggest that subjects are capable of performing most exercise and mobility activities. Future research should focus on exercise interventions that address self-efficacy and other behavioral barriers (e.g. musculoskeletal pain, psychosocial factors, and social stigma) with the goal of maximizing post surgical weight loss success.
| Identifer | oai:union.ndltd.org:PITT/oai:PITTETD:etd-04232009-101049 |
| Date | 08 June 2009 |
| Creators | Josbeno, Deborah |
| Contributors | Melissa Kalarchian, PhD, John M. Jakicic, PhD, Amy Otto, PhD, Patrick Sparto, PhD |
| Publisher | University of Pittsburgh |
| Source Sets | University of Pittsburgh |
| Language | English |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.library.pitt.edu/ETD/available/etd-04232009-101049/ |
| Rights | unrestricted, I hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to University of Pittsburgh or its agents the non-exclusive license to archive and make accessible, under the conditions specified below, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report. |
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