Rates of obesity in the United States have been increasing despite an increase of dieters. A new paradigm, intuitive eating, has been introduced to counter the negative effects of dieting. Intuitive eating has not been compared to dieters on a nutritional level, however. The main purpose of this study was to determine the nutritional differences between intuitive eaters and dieters. Participants were asked to complete questionnaires regarding food consumption and attitudes about eating. Participants (N = 32) were then classified as intuitive eaters or dieters and asked to complete six, 24-hr food logs. Data received from these food logs were compared based on group classification to determine statistical significance. The results of the ttests did not determine statistical significance between groups regarding food consumption (p > .05). A chi-square test used to determine if intuitive eaters consumed within 100 kilocalories of their recommended level of calorie consumption was found to be statistically significant (p < .05).

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Secondary amenorrhea, ovulatory disturbances, and luteal phase deficiency occur in normal-weight women with sub-clinical eating disorders. The purpose of this investigation was to examine the influence of Eating Attitudes Test (EAT-26) scores, energy intake, and frequency of activity on ovarian hormone status in normal-weight, college-age women. Fourteen normal-weight female students, ages 19 - 24, who were attempting weight loss and did not currently meet diagnostic criteria for an eating disorder, served as subjects. Food-intake, dieting behavior, and menstrual cycle function were recorded by subjects during a three month period. Biweekly blood samples were assayed for estradiol and progesterone for one menstrual cycle. Mean age, number of years dieting, and BMI were similar between subjects. Five subjects (36%) had progesterone levels indicative of luteal phase deficiency or anovulation. The EAT-26 score was not associated with menstrual cycle dysfunction. Frequency of exercise and serum progesterone concentration were significantly correlated. Subjects who exercised 7+ hours per week had significantly lower peak progesterone values (p<0.03) than subjects who exercised 1 -3 hours per week. Within the group of subjects scoring above 20 on the EAT-26, those who exercised 7+ hours per week had significantly lower peak progesterone values than subjects exercising 1 - 6 hours (p < 0.03). There was a positive correlation (r = 0.384, P = 0.21) between length of luteal phase and daily energy intake, however the relationship was non-significant. Normal-weight, premenopausal women dieting to lose weight experienced menstrual cycle dysfunction in the absence of significant weight loss or diagnosable eating disorder. / Master of Science

An increasing number of people are turning to online blogging communities devoted to self-change for smoking, shopping, and other behaviors. To understand processes underlying effective self-change, the current project tracked the language and social dynamics of a dieting blog community using computerized text analysis. Three research questions were asked: What predicts weight loss in blogs? What changes in blogging predict weight loss? Can we predict dropping out or successful weight loss based on the first two entries? A community of blogs devoted to weight loss was examined (n = 2530). Most bloggers were female, and on average, around 30 years old, approximately 200 pounds, with a goal weight of about 140 pounds. A sample of blogs by females that had blogged at least 15 entries within the first 15 weeks of blogging resulted in a total of 186 blogs, representing over 9,200 entries for analysis. Computerized text analysis was used to examine language for rates of self-focus, emotionality, cognitive processing, keeping food diaries, and social support. Rates of blogging were assessed by word counts, number of active weeks, and mean entries per week. Social support was assessed through the use of social words, the size of the social network, along with the positivity and negativity of the comments. The discrepancy between start and goal weight was also assessed. The results suggested that having larger weight loss goals and blogging about personal events was a more effective weight loss strategy than keeping an online food intake diary. The degree to which bloggers were socially integrated with the blog community was found to be a potent predictor of weight loss. Online components of behavioral treatment programs could encourage dieters to browse and comment on other dieters’ progress, and to share personal narratives rather than simply focusing on the benefits of food intake diaries, nutrition, and exercise. The current project points to the power of computerized text analytic tools to address important theoretical and practical social psychological issues that are evolving on the internet. Specifically, language analysis methods can identify which dimensions of blogging communities can help or hinder self-change processes. / text

Highly palatable and/or calorically dense foods, such as those rich in fat, engage the striatum to govern and set complex behaviors. Striatal dopamine signaling has been implicated in hedonic feeding and the development of obesity. Dieting and bariatric surgery have markedly different outcomes on weight loss, yet how these interventions affect central homeostatic and food reward processing remains poorly understood. Here, we propose that dieting and gastric bypass produce distinct changes in peripheral factors with known roles in regulating energy homeostasis, resulting in differential modulation of nigrostriatal and mesolimbic dopaminergic reward circuits. Enhancement of intestinal fat metabolism after gastric bypass may also modify striatal dopamine signaling contributing to its unique long-term effects on feeding behavior and body weight in obese individuals.

Highly palatable and/or calorically dense foods, such as those rich in fat, engage the striatum to govern and set complex behaviors. Striatal dopamine signaling has been implicated in hedonic feeding and the development of obesity. Dieting and bariatric surgery have markedly different outcomes on weight loss, yet how these interventions affect central homeostatic and food reward processing remains poorly understood. Here, we propose that dieting and gastric bypass produce distinct changes in peripheral factors with known roles in regulating energy homeostasis, resulting in differential modulation of nigrostriatal and mesolimbic dopaminergic reward circuits. Enhancement of intestinal fat metabolism after gastric bypass may also modify striatal dopamine signaling contributing to its unique long-term effects on feeding behavior and body weight in obese individuals.

Relationships between body dissatisfaction, dieting methods, father absence, and puberty timing were investigated in this study. Participants included adolescent females from Wave 1 of the National Longitudinal Survey of Adolescent Health. Logistic regression results indicated that girls without a biological father in the home were significantly more likely to have an early onset of puberty than on-time or late. Girls who experienced early puberty exhibited higher levels of body dissatisfaction, but didn't use more dieting methods. Early onset girls more likely used dieting methods if their biological father was present than absent; however, no significant difference in body dissatisfaction was shown. A negative relationship with fathers indicated more body dissatisfaction. None of the attained findings were found when the biological mother was absent, and having a stepfather did not seem to matter. Evidence was revealed that fathers play a role in their daughters' view of their own bodies.

Introduction: Weight dissatisfaction and misperception are widespread problems in the United States as are unhealthy weight loss practices. These negative body image issues can lead to eating disorders which have serious health and quality of life consequences. Objective: To evaluate the extent to which the prevalence of distorted body image and unhealthy dieting tactics exist in adults in the US and how these are related. Methods: Data from NHANES 2000-20006 on adults aged 20-59 was used. Weight perception was assessed with the physical exam measurements of weight status and the weight history questionnaire item asking if the person considered him or herself to be underweight, normal weight or overweight. Weight loss techniques were assessed with the weight history questionnaire items asking what methods they used if they tried to lose weight. Respondents were classified as having a weight perception discord if their perception was greater than actual weight status, and as having a concord in all other cases. Results: The total sample was 6,022. 10% had a perception discord and 15% used unhealthy weight loss practices. After adjustment, a significant relationship between a perception discord and behaviors was not found--this held true for both men and women. Discussion and Conclusion: Our results were similar overall to past studies; our inability to find a relationship could have been hampered by stigma associated with the subject matter. There are clearly other factors related to the adoption of unhealthy weight loss behaviors, which need to be determined.

Research has shown that elite female athletes competing in competitive sports may experience weight consciousness and face demands to conform to unrealistic standards of body weight. The purpose of this research was to investigate body image and dieting behaviours in adolescent female athletes and non-athletes. A self-reporting questionnaire was administered to 60 athletes aged between 13-16 years derived from eight different sporting populations, and a control group consisting of 60 non-athletes or inactive individuals aged between 13-16 years. Two major areas relating to weight and eating behaviours were examined: disordered eating and distorted body image. Other variables under investigation included current attempts at weight loss, level of acceptance of thin female stereotypes promoted by the media, reasons for dieting, and perception of one’s own body image. Results indicated that the majority of the athletes displayed a positive body image and were generally happy with their overall body shape. This group was less likely to employ weight loss behaviours. However, the non-athletes were more likely to display distorted body image and distorted eating behaviours. Consistent with the cultural expectations of thinness, large proportions of the non-athletes wished to lose weight, even though their actual weight (i.e. Body Mass Index) was normal or underweight. Weight concerns in the non-athlete group related more to attaining a media driven “ideal” of femininity. The weight concerns recorded amongst a small number of athletes were related more to improving sporting performance. Although no clinically diagnosed cases of eating disorders were recorded, eating behaviours, weight reduction practices and body image beliefs indicated that the adolescent female non-athletes may be at risk of developing disordered eating and body image problems.