Although many individuals have difficulty sustaining weight loss, some are able to maintain a substantial amount of weight loss over a long period of time. To increase the prevalence of successful weight loss maintenance, two types of research investigating weight loss maintenance have been conducted: observational and experimental. In observational research, successful weight loss maintainers are identified and information about how they maintain their weight loss is collected. With experimental research, variables that are believed to affect weight status are manipulated and weight change over time is measured.
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