|Title:||Prevention and Management of Weight Gain in Young Adulthood|
|Publisher:||University of Sydney.|
Faculty of Science.
School of Molecular Bioscience.
Discipline of Nutrition & Metabolism.
|Abstract:||Over the last few decades, prevalence of excess body weight has escalated among populations. Addressing this ‘obesity epidemic’ requires strategies for preventing population weight gain, particularly among groups with above average risk, such as young adults. The overarching aim of this research was to develop and evaluate a lifestyle program for the prevention and management of weight gain in young adults. Existing randomised controlled trials (RCTs) were systematically reviewed to identify characteristics of effective programs for young adults. These included self-monitoring of weight-related behaviours, tailoring feedback to be personally relevant, providing an initial consultation with subsequent support, increasing physical activity and reducing dietary energy density. Findings from this review informed the development of a mobile phone-based program which was piloted in a RCT with N=52 young adults. Participants achieved some short-term positive changes in their weight, diet and physical activity, although not significantly different from controls. Process findings from this pilot, including a preference for set weight targets, personalised regular contact, and support with planning meals and activity schedules, informed TXT2BFiT (‘Text to be fit’), a multi-component, nine-month, mobile phone-based program aimed at assisting young adults with managing their weight and weight-related dietary and physical activity behaviours. Efficacy of the TXT2BFiT program was tested in a primary RCT with a preliminary sample of N=118 young adults, found to be effective for reducing participants’ body weight, total energy intake, and frequency of energy-dense takeaway meals. Future research will test efficacy of the TXT2BFiT program among the target sample (N=352). If demonstrated to be effective, with wide reach regardless of socio-demographic profile, it may provide an equitable, cost-effective solution for the prevention and management of weight gain in young adults.|
|Description:||Includes published papers co-authored with others|
|Access Level:||Access is restricted to staff and students of the University of Sydney . UniKey credentials are required. Non university access may be obtained by visiting the University of Sydney Library.|
|Rights and Permissions:||The author retains copyright of this thesis. It may only be used for the purposes of research and study. It must not be used for any other purposes and may not be transmitted or shared with others without prior permission.|
|Type of Work:||PhD Doctorate|
|Type of Publication:||Doctor of Philosophy Ph.D.|
|Appears in Collections:||Sydney Digital Theses (University of Sydney Access only)|
|hebden_lh_thesis.pdf||PhD Thesis||11.5 MB||Adobe PDF|
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