Graduate Thesis Or Dissertation

 

Short and long-term effectiveness of a weight loss program Public Deposited

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https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/6d56zz663

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  • The purpose of this study was to determine that a behavioral lifestyle modification approach to weight loss changes participants' dietary intake and physical activity levels and that these changes were associated with weight loss and weight loss maintenance. Behavioral factors important in other weight control studies were also investigated to see if they are important indicators of successful weight control in this program as well. A group of previously validated questionnaires, along with a weight history written for this study, was administered to current participants in Providence Health System's Smart CHOICES program both before and after program participation. The same questionnaires were administered to past participants in a one-time follow-up for the CHOICES program approximately 2 years after program completion. The study found that current participant successful weight losers did decrease their percentage of energy intake from fat more than did non-successful weight losers over the course of the program. Also, successful weight losers decreased their caloric intake and increased physical activity levels during the program and these changes did not occur in non-successful weight losers. The Eating Inventory scales for cognitive restraint and Westenhoefer's flexible control showed expected increases and disinhibition and hunger scores showed expected decreases among successful weight losers. However, non-successful weight losers showed these same changes except for the hunger scores, which did not decrease during the program. There were no differences found between past participant weight loss maintainers and non-maintainers in caloric intake, percentage fat intake, physical activity levels, Eating Inventory scales, or flexible and rigid control. When compared to successful weight losers among the current participants, there were suggestions that past participant weight loss maintainers and non-maintainers regressed toward their pre-treatment levels in percentage of fat intake, physical activity levels, and flexible control scores over time. While the Smart CHOICES program is effective in bringing about short-term behavior change to produce weight loss, maintenance of weight loss is a problem in this program as it is in other lifestyle modification programs. The factors differentiating successful weight maintenance from weight regain after loss in this program were not identified.
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