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18. Butte NF, Puyau MR, Adolph AL, Vohra FA, and Zakeri I. Physical activity in
nonoverweight and overweight Hispanic children and adolescents. Med Sci Sports Exerc
39: 1257-1266, 2007.
19. Byberg L, Zethelius B, McKeigue PM, and Lithell HO. Changes in physical activity
are associated with changes in metabolic cardiovascular risk factors. Diabetologia 44:
2134-2139, 2001.
20. C.-Y. Ji and Cooperative Study on Childhood Obesity: Working Group on Obesity
in China (WGOC). The prevalence of childhood overweight/obesity and the epidemic
changes in 1985–2000 for Chinese school-age children and adolescents Obesity Reviews
9: 78-81, 2008.
21. Cali AM, and Caprio S. Obesity in children and adolescents. J Clin Endocrinol
Metab 93: S31-36, 2008.
22. Calle EE, and Kaaks R. Overweight, obesity and cancer: epidemiological evidence
and proposed mechanisms. Nat Rev Cancer 4: 579-591, 2004.
23. Caprio S. Insulin resistance in childhood obesity. J Pediatr Endocrinol Metab 15
Suppl 1: 487-492, 2002.
24. Caprio S, Daniels SR, Drewnowski A, Kaufman FR, Palinkas LA, Rosenbloom AL,
and Schwimmer JB. Influence of race, ethnicity, and culture on childhood obesity:
implications for prevention and treatment: a consensus statement of Shaping America's
Health and the Obesity Society. Diabetes Care 31: 2211-2221, 2008.
25. Centers for Disease Control and Prevention. Obesity - At A Glance 2009
http://www.cdc.gov/chronicdisease/resources/publications/AAG/obesity.htm. [08/16,
2010].
26. Chen C. Overview of obesity in Mainland China. Obes Rev 9: 14-21, 2008.
Object Description
| Title | The vicious cycle of inactivity, obesity, and metabolic health consequences in at-risk pediatric populations |
| Author | Hsu, Ya-Wen |
| Author email | ywxxbirdy@yahoo.com; yawenhsu@usc.edu |
| Degree | Doctor of Philosophy |
| Document type | Dissertation |
| Degree program | Preventive Medicine (Health Behavior) |
| School | Keck School of Medicine |
| Date defended/completed | 2011-03-09 |
| Date submitted | 2011 |
| Restricted until | Restricted until 26 Apr. 2012. |
| Date published | 2012-04-26 |
| Advisor (committee chair) |
Chou, Chih-Ping Spruijt-Metz, Donna |
| Advisor (committee member) |
Unger, Jennifer B. Azen, Stanley Paul Palinkas, Lawrence A. |
| Abstract | PURPOSE: This dissertation examined the associations between physical activity, sedentary behavior, overweight, and the metabolic syndrome (MetS) in at-risk pediatric populations in the United States and in China. Study 1 identified the independent influences of physical activity, sedentary behavior, and other weight-related correlates on overweight status in Chinese youth. Study 2 explored the influences of physical activity and sedentary behavior on MetS in US minority youth. Study 3 compared the longitudinal trends of physical activity and sedentary behavior between youth with and without MetS in a sample of US minority female youth.; METHODS: Participants were youth (ages 8-18 years) in the United States and in China. Study 1 used baseline data from of a longitudinal smoking prevention and health promotion study conducted in the 7 large cities in China for Chinese youth ages 11-18 years. Study 2 used baseline data from three related pediatric obesity studies that share a set of common methods and measures (US Latino and African American youth ages 8-18 years). Data for Study 3 are from a longitudinal, observation study for Latina and African American female youth ages 8-11 years at baseline.; RESULTS: In Study 1, Chinese youth were more likely to be overweight if they spent more time being sedentary, slept <7 hours/night, were male, were younger, participated more in vigorous physical activity, had higher levels of parental education, better self-perceived health status, a higher frequency of vegetable intake, and a lower frequency of sweet/fast food intake. In Study 2, lower levels of moderate-to-vigorous physical activity (by accelerometry) and higher levels of sedentary behavior (by 3-day physical activity recall) are associated with increased the metabolic risk independent of each other and body composition. In Study 3, a significant decline in MVPA and an increase in sedentary behavior were observed over one year. Sedentary behavior as measured by accelerometry increased 23.42 minutes/per quarterly visit, adding up to 93.68 minutes/per year more in youth with MetS than in those without.; CONCLUSION: Overweight-related correlates seem to play different roles in the Chinese culture than in Western cultures. Findings from this dissertation support a vicious cycle of increasing inactivity, obesity, and metabolic complications. These findings, coupled with longitudinal evidence of the effects of activity levels on obesity and MetS, suggests that physical activity and sedentary behavior could function as antecedents as well as consequences of overweight or MetS in youth. |
| Keyword | Chinese youth; metabolic syndrome; minority youth; obesity; physical activity; sedentary behavior |
| Geographic subject (country) | USA; China |
| Coverage date | 1970/2010 |
| Language | English |
| Part of collection | University of Southern California dissertations and theses |
| Publisher (of the original version) | University of Southern California |
| Place of publication (of the original version) | Los Angeles, California |
| Publisher (of the digital version) | University of Southern California. Libraries |
| Provenance | Electronically uploaded by the author |
| Type | texts |
| Legacy record ID | usctheses-m3779 |
| Contributing entity | University of Southern California |
| Rights | Hsu, Ya-Wen |
| Repository name | Libraries, University of Southern California |
| Repository address | Los Angeles, California |
| Repository email | cisadmin@lib.usc.edu |
| Filename | etd-Hsu-4455 |
| Archival file | uscthesesreloadpub_Volume23/etd-Hsu-4455.pdf |
Description
| Title | Page 145 |
| Contributing entity | University of Southern California |
| Repository email | cisadmin@lib.usc.edu |
| Full text | 134 18. Butte NF, Puyau MR, Adolph AL, Vohra FA, and Zakeri I. Physical activity in nonoverweight and overweight Hispanic children and adolescents. Med Sci Sports Exerc 39: 1257-1266, 2007. 19. Byberg L, Zethelius B, McKeigue PM, and Lithell HO. Changes in physical activity are associated with changes in metabolic cardiovascular risk factors. Diabetologia 44: 2134-2139, 2001. 20. C.-Y. Ji and Cooperative Study on Childhood Obesity: Working Group on Obesity in China (WGOC). The prevalence of childhood overweight/obesity and the epidemic changes in 1985–2000 for Chinese school-age children and adolescents Obesity Reviews 9: 78-81, 2008. 21. Cali AM, and Caprio S. Obesity in children and adolescents. J Clin Endocrinol Metab 93: S31-36, 2008. 22. Calle EE, and Kaaks R. Overweight, obesity and cancer: epidemiological evidence and proposed mechanisms. Nat Rev Cancer 4: 579-591, 2004. 23. Caprio S. Insulin resistance in childhood obesity. J Pediatr Endocrinol Metab 15 Suppl 1: 487-492, 2002. 24. Caprio S, Daniels SR, Drewnowski A, Kaufman FR, Palinkas LA, Rosenbloom AL, and Schwimmer JB. Influence of race, ethnicity, and culture on childhood obesity: implications for prevention and treatment: a consensus statement of Shaping America's Health and the Obesity Society. Diabetes Care 31: 2211-2221, 2008. 25. Centers for Disease Control and Prevention. Obesity - At A Glance 2009 http://www.cdc.gov/chronicdisease/resources/publications/AAG/obesity.htm. [08/16, 2010]. 26. Chen C. Overview of obesity in Mainland China. Obes Rev 9: 14-21, 2008. |
