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Earlier studies associated the first year of college with a dramatic increase in body weight, termed the "freshman 15". However, recent studies showed that weight gain might be smaller. The purpose of this review was to evaluate the extent of observed weight/body composition changes, including factors associated with them, among students entering university. Searches were conducted for studies examining weight/body composition changes during freshman semesters. Most studies were not comprehensive in assessing numerous potential causative factors for weight gain. Methods for assessing diet, physical activity, and behavioral factors varied among studies. Weight changes were often not quantified by measures of body composition (lean/fat) to ascertain that changes were limited just to gains in fat mass. Overall, weight changes ranged from 0.7-3.1 kg, but among individuals who gained weight, the range was narrower, 3.1-3.4 kg. There may be specific groups of students with a greater predisposition for weight gain and future research should focus on identifying those groups.

Objective: The aims of the study were to assess whether women during the first year of college experience (1) significant weight gain; (2) a prospective relation between dietary restraint and weight gain; (3) an increase in disordered eating; and (4) a prospective relation between dietary restraint or concern about the Freshmen 15 (i.e., weight gain of 15 lbs during the freshman year of college) and disordered eating.\n\nMethod\nParticipants were 336 female students in their first year of college who completed questionnaire measures of Body Mass Index (BMI), eating disorder pathology, dietary restraint, body image, and self-esteem.\n\nResults\nParticipants' mean weight gain was approximately 3 lbs (1.5 kg), and among those who gained weight, the mean gain was 7.32 lbs (3.3 kg). Dietary restraint in September did not predict weight change in April, but participants who lost weight reported significantly greater dietary restraint than those participants who gained weight. Eating disorder symptoms increased significantly from September to April. Dietary restraint, concern about the "Freshman 15", and self-esteem in September uniquely predicted EDE-Q Weight and Shape Concern subscale scores in April.\n\nDiscussion\nFemale students in their first year of college gain a small but significant amount of weight, and weight gain was mostly unrelated to dietary restraint. Disordered eating increases during the first year of college and, is predicted by prospective dietary restraint and concerns about weight gain.