Weight Change Behaviors Research Articles

Association of weight and shape concern with weight change and weight-related behaviors in behavioral weight loss treatment.

Weight and shape concern (WSC) is a facet of negative body image that is common among individuals with overweight/obesity seeking behavioral weight loss treatment (BWL), but remains understudied. This secondary analysis evaluates associations between WSC, weight change, and weight-related behaviors among individuals in a 24-week BWL. Adults (n = 32) with body mass index 25-50kg/m2 completed a baseline WSC questionnaire, measured weight at 12 and 24 weeks, measured physical activity via accelerometer, and completed 24-hour dietary recalls. Adherence to self-monitoring dietary intake and weight were assessed. A series of linear mixed models were used to evaluate associations between baseline WSC and weight change, as well as weight-related behaviors. Results revealed no significant effect of WSC on weight change. There were significant WSC x time interactions, such that those rating WSC "very important" decreased self-weighing and the "low importance" group decreased their caloric intake during treatment. The "pretty important" group had greater minutes of activity than the "low importance" group. Findings indicated that WSC may impact weight-related behaviors that contribute to BWL success. This trial was pre-registered on ClinicalTrials.gov (NCT03739151).

Screen time, social media use, and weight-change behaviors: Results from an international sample of adolescents

This study aimed to investigate whether screen time and social media use are associated with weight-change behaviors among an international sample of adolescents. Cross-sectional data from the 2020 International Food Policy Study Youth Survey (ages 10–17; Australia, Canada, Chile, Mexico, United Kingdom, United States; N = 12,031) were analyzed. Self-reported hours of use of five forms of screen time (e.g., social media use), and total screen time per weekday were assessed. Use of six contemporary social media platforms (e.g., Facebook, Instagram) were also assessed. Weight-change behaviors included current attempts to gain weight, lose weight, stay the same weight, and not do anything to change weight, as well as dieting to lose weight in the past 12 months. Greater total screen time per weekday was associated with attempts to gain weight and lose weight, and dieting to lose weight. Specific social media platform use was associated with weight-change behaviors. For example, use of Twitter was most strongly associated with attempts to gain weight, lose weight, and dieting to lose weight. Findings underscore the international pervasiveness of screen time and social media use correlating with weight-change behaviors among adolescents. Global efforts are needed to ensure the appropriate use of screens and social media among adolescents.

Parent-adolescent dyadic associations among weight misperceptions, weight change behaviors, and dietary intakes

Prior research has shown that larger differences between individuals' actual and perceived bodily states are associated with their engagement in weight change behaviors. However, it remains unknown whether these intrapersonal associations extend to the parent-adolescent dyadic level. To address this research gap, the present study examined associations between parents' and adolescents' weight misperceptions (discrepancies between individuals' self-reported body mass indices and perceived weight statuses) relative to participants' own and their dyadic partners' weight change behaviors and dietary intakes. Participants included a large community sample of parent-adolescent dyads (N = 1,606 dyads) who completed the National Cancer Institute's FLASHE Study. Actor-partner interdependence models examined dyadic associations among participants' weight misperceptions (over- and under-perceptions) relative to their own and their dyadic partners' general weight change behaviors (current weight loss and gain behaviors), and low nutrient (e.g., processed foods) and nutrient-dense (e.g., fruits/vegetables) dietary intakes. Multiple intrapersonal and cross-dyad member associations were identified that varied based on the direction of weight misperceptions, the weight control behavior type, and whether the dyadic member was a parent or adolescent. For example, adolescents' weight under-perception was associated with a lower likelihood of their own, but not their parents', current weight loss behavior use, whereas parents who exhibited weight under-perception were less likely to report weight loss behaviors at the intrapersonal level and were less likely to have adolescents who reported weight loss behaviors. These results suggest that associations among weight misperceptions and weight control behaviors within the parent-adolescent dyadic context are complex, and that both inter- and intra-individual processes are implicated in these associations. The impact of these perceptual influences on parent-adolescent dyads' use of both healthy and disordered eating behaviors warrants further exploration in future research.

Changes in the Prevalence and Correlates of Weight-Control Behaviors and Weight Perception in Adolescents in the UK, 1986-2015

In the context of the growing prevalence of childhood obesity, behaviors aimed at weight loss and their psychological burden might be increasing. To investigate whether the prevalence of weight-control behaviors and weight perception, including their association with depressive symptoms, has changed in the 3 decades between 1986 and 2015. This study used data from repeated cross-sections from successive longitudinal birth cohort studies. These included general population samples of UK adolescents aged 14 to 16 years from 3 ongoing birth cohorts: the British Cohort Study 1970 (children born between April 5 and 11, 1970; data collected in 1986), the Avon Longitudinal Study of Parents and Children (mothers with expected delivery between April 1, 1991, and December 21, 1992; data collected in 2005), and the Millennium Cohort Study (children born between September 1, 2000, and January 11, 2002; data collected in 2015). A total of 22 503 adolescents with data available on at least 1 weight-control or weight-perception variable in midadolescence were included in the study. Data were analyzed from August 1, 2019, to January 15, 2020. Self-reported lifetime dieting and exercise for weight loss, current intentions about weight (doing nothing, lose weight, stay the same, gain weight), and weight perception (underweight, about the right weight, overweight) adjusted for body mass index. The secondary outcome was depressive symptoms. The main exposure was time (ie, cohort); secondary exposures were weight-change behaviors and weight perception. The study cohort included 22 503 adolescents (mean [SD] age, 14.8 [0.3] years; 12 061 girls [53.6%]; and 19 942 White individuals [89.9%]). A total of 5878 participants were from the British Cohort Study, 5832 were from the Avon Longitudinal Study of Parents and Children, and 10 793 were from the Millennium Cohort Study. In 2015, 4809 participants (44.4%) had dieted and 6514 (60.5%) had exercised to lose weight compared with 1952 (37.7%) and 344 (6.8%) in 1986. Furthermore, 4539 (42.2%) were trying to lose weight in 2015 compared with 1767 (28.6%) in 2005. Although girls were more likely to report these behaviors in all years, their prevalence increased more in boys over time (lifetime dieting in boys: odds ratio [OR], 1.79; 95% CI, 1.24-2.59; in girls: OR, 1.23; 95% CI, 0.91-1.66; currently trying to lose weight in boys: OR, 2.75; 95% CI, 2.38-3.19; in girls: OR, 1.70; 95% CI, 1.50-1.92). Adolescents also became more likely to overestimate their weight (boys describing themselves as overweight adjusting for body mass index, 2005 vs 1985 OR, 1.60; 95% CI, 1.17-2.19; 2015 vs 1985 OR, 1.36; 95% CI, 1.04-1.80; girls describing themselves as underweight, after adjusting for body mass index, 2015 vs 1986 OR, 0.51; 95% CI, 0.28-0.91). Girls who described themselves as overweight experienced increasingly greater depressive symptoms over time compared to girls who described their weight as about right (mean difference 1986, 0.32; 95% CI, 0.22-0.41; mean difference 2005, 0.33; 95% CI, 0.24-0.42; mean difference 2015, 0.56; 95% CI, 0.49-0.62). These findings suggest that the growing focus on obesity prevention might have had unintended consequences related to weight-control behaviors and poor mental health. Public health campaigns addressing obesity should include prevention of disordered eating behaviors and be sensitive to negative impact on mental health.

Effects of Azithromycin on Behavior, Pathologic Signs, and Changes in Cytokines, Chemokines, and Neutrophil Migration in C57BL/6 Mice Exposed to Dextran Sulfate Sodium.

Here we characterized the murine dextran sulfate sodium (DSS) model of acute colitis. Specifically, we evaluated azithromycin and metronidazole treatment regimens to assess their effects on animal wellbeing, pathologic changes, barrier function, cytokine and chemokine profiles, and neutrophil migration in colon tissue. Azithromycin treatment significantly reduced the severity of colitis, as assessed through body weight change, water consumption, macroscopic lesions, and animal behaviors (activity level, climbing, and grooming), but did not alter food consumption or feeding behavior. Mucosal barrier function (evaluated by using FITC-labeled dextran) was decreased after DSS exposure; azithromycin did not significantly alter barrier function in mice with colitis, whereas metronidazole exacerbated the colitis-related deficit in barrier function. In addition, metronidazole appeared to exacerbate disease as assessed through water consumption and animal behaviors (overall activity, climbing, grooming, and drinking) but had no effect on weight loss, macroscopic lesions, or eating behavior. Pathologic changes were typical for DSS treatment. Antibiotic treatment resulted in reduced levels of proinflammatory cytokines and chemokines and decreased neutrophil adhesion and emigration in DSS-exposed mice. The results highlight the importance of clinical and behavioral assessments in addition to laboratory evaluation as tools to evaluate animal welfare and therapeutic efficacy in disease models. Data from this study suggest that azithromycin may convey some benefits in the mouse DSS colitis model through modulation of the immune response, including neutrophil migration into tissues, whereas metronidazole may exacerbate colitis.

An exploration of the psychometric properties of the SATAQ-4 among adolescent boys in Japan

Research among Western adult and adolescent males suggests that sociocultural influences are implicated in the drive for muscularity and weight-change behaviors. However, few studies have examined these relationships among adolescent boys from non-Western backgrounds. The current study sought to assess the psychometric properties of the Sociocultural Attitudes Towards Appearance Questionnaire-4 (SATAQ-4), a 22-item, 5-factor measure of sociocultural influence on appearance ideals, among Japanese (n = 984) adolescent boys. Relationships between appearance-related pressures, appearance ideal internalization, appearance-related teasing, drive for muscularity, and weight-change behaviors were also assessed. Exploratory and confirmatory factor analyses identified a four factor solution (Internalization: Thin/Low Body Fat, Internalization: Muscular/Athletic, Pressures: Media, and Pressures: Family/Peers) with 16 items in this sample. Correlational analyses supported the construct validity of the SATAQ-4. Thin internalization was associated with strategies to lose weight, while muscular internalization was associated with drive for muscularity and strategies to gain weight. Further, peer and parental appearance teasing was associated with perceived appearance pressures from family and peers, as well as weight change strategies. Overall, results suggested modification of the SATAQ-4 when used with Japanese samples, but supported its use to assess sociocultural influences. Additionally, the results highlight that sociocultural influences and muscularity concerns among Japanese adolescent boys are associated in similar ways with weight change strategies as has been established for adolescent males in Western countries.

Abstract P251: Relationship Between Body Size of Social Network Members and Body Size Norms of South Asian Adults

Objective: Perceptions of a healthy body weight may be influenced by social norms within a social network. This study tested the hypothesis that social network body size is associated with body size norms in South Asian adults from the Mediators of Atherosclerosis in South Asians Living in America (MASALA) study. Methods: South Asian adults (n=700) were asked to list their personal social network members, defined as the “people who you regularly talk with about things that are important to you,” at the social network ancillary study examination (2014-2017). Participants’ perceptions of their network members’ body sizes, their own body size (self-body size), and a healthy body size (body size norm) for men and women were assessed using the Stunkard 9-figure scale. The Stunkard scale is a silhouette figure rating scale consisting of 9 male and 9 female figures of increasing body size (range 1-9). Participants’ height and weight were measured, and body mass index (BMI) was calculated. The average body size of network members was the main independent variable. Body size norm was the dependent variable in a regression model that controlled for age, sex, gender of Stunkard figure, cultural identity, self-body size, participants’ measured BMI, and social network size. A random intercept term was included at the participant level to account for clustering of male and female body size norms within participants. Results: Participants’ average age was 59 years (SD+/-9 years) and 43% were female. The average body size norm for male and female Stunkard images was 3.6 (SD+/-1.0) and 3.4 (SD+/-0.8), respectively. Participants’ average self-body size was 4.7 (SD+/-1.5). There were 2,991 social network members identified (mean number of network members=4, SD=1), and the majority (70%) were kin. The average network body size was 3.9 (SD +/-1.1). For every unit increase in their networks’ average body size, participants’ perceptions of body size norms increased 0.31 points on the Stunkard scale (p<0.01; 95% CI: 0.25, 0.36), independent of self-body size and BMI. Perception of a healthy body size norm was 0.25 points lower for female Stunkard figures than for male figures (p<.01; 95% CI: -0.30, -0.20). Conclusions: Having social network members with larger body sizes was associated with a higher body size norm in South Asian adults. Norms for female body images were smaller than for male images. Long-term follow-up of the MASALA cohort will determine if network members’ body size and body size norms are associated with weight change and weight-control behaviors in South Asians.

P2477Assessing self-measurement, activity, and weight change behaviors of connected scale users who reduced their pulse wave velocity over 4 months

P2477Assessing self-measurement, activity, and weight change behaviors of connected scale users who reduced their pulse wave velocity over 4 months

Relationship of night and shift work with weight change and lifestyle behaviors.

To prospectively study the association of night and shift work with weight change and lifestyle behaviors. Workers participating in the Netherlands Working Conditions Cohort Study (2008 and 2009) (N = 5951) reported night and shift work, weight and height. Groups included stable night or shift work, from day work to night or shift work, from night or shift work to day work, and no night or shift work in 2008 and 2009. Regression analyses were used to study association changes in night and shift work with weight change and changes in lifestyle behaviors. A larger weight change was seen in normal-weight workers changing from day to shift work (β = 0.93%; 95% confidence interval, 0.01 to 1.85) compared with stable no shift workers. No further associations of night and shift work with weight change were observed, neither in normal-weight, overweight, and obese workers. Despite the fact that starting night or shift work is associated with some unhealthy lifestyle habits, this study did not confirm a positive association of night and shift work with weight change over 1 year, except for normal-weight workers moving from day to shift work.

Relationships between body image, nutritional supplement use, and attitudes towards doping in sport among adolescent boys: implications for prevention programs

BackgroundReports of high levels of use of protein powders and nutritional supplements among young men is a concern because these substances may act as a gateway for the use of drugs and illegal substances to enhance appearance or sports performance. The aim of this study was to investigate the relationship between body dissatisfaction, weight change behaviors, supplement use, and attitudes towards doping in sport among an adolescent male sample.MethodsParticipants were 1148 male adolescents (age range 11-21 years) in Australia who completed a self-report questionnaire that measured weight change behaviors, supplement use, body dissatisfaction (Male Body Attitudes Scale; MBAS) and attitudes towards doping in sport (Performance Enhancing Attitudes Survey; PEAS).ResultsThere was a positive correlation between MBAS total and PEAS scores (r = .19, p < .001), indicating that the young men who were more dissatisfied with their bodies were more likely to support the use of doping in sport. Young men who were currently attempting weight loss or weight gain, and those currently consuming energy drinks (ηp2 = .01, p < .01) and vitamin/mineral supplements (ηp2 = .01, p < .01) were also significantly more supportive of doping in sport. However, those involved in weight lifting, and using protein powders were not (p > .05).ConclusionsThese findings suggest that body dissatisfaction, weight change behaviors, and supplement use are related to more lenient attitudes towards doping in sport among adolescent boys. Future research might examine whether combining educational content for the prevention of body dissatisfaction and the use of drugs in sport may have a greater preventive impact than current programs aimed at young men.

Understanding Weight Change Behaviors through Online Social Networks

Online Social Networks (OSNs) provide a good way to make connections with people with similar interests and goals. In particular, health-centered OSNs are emerging to provide knowledge and support for those interested in managing their own health. This paper provides an empirical analysis of a health OSN, which allows its users to record their foods and exercises, track their diet progress toward weight-change goals, and socialize and group with each other for community support. Based on about five month data collected from more than 107,000 users, the authors studied their weigh-in behaviors and tracked their weight-change progress. The authors found that the users’ weight changes correlated positively with the number of weigh-ins, the number of their friends, and their friends’ weight-change performance. The authors also show that the users’ weight changes have rippling effects in the OSN due to social influence. The strength of such online influence and its propagation distance appear to be greater than those in a real-world social network.

Assessing the Stages of Change Among African American Women in a Weight Management Program.

The objective of this study was to assess the relationship between stage of change (SOC) and behavioral outcomes among African American women entering obesity treatment in two settings. Fifty-five overweight/obese (body mass index = 26.50-48.13), but otherwise healthy African American women, 23 to 56 years old, attended a 13-week weight loss-treatment program that took place at churches (n = 36) or a university (n = 19). Participants were weighed, completed SOC measures, and had a physical fitness test at pre- and posttreatment. Pretreatment measures of SOC placed 47% of the participants as actors, 31% as contemplators, and 22% as maintainers. Of the 45 women who reported posttreatment SOC, 7% regressed, 44% did not change, and 31% progressed in SOC. Pretreatment SOC predicted posttreatment weight loss in the church setting but not in the university setting. At churches, contemplators lost more weight than actors and maintainers. The church may be a more conducive setting for weight change behaviors for African American women who are categorized as contemplators in the SOC model.

A Prospective Study of Extreme Weight Change Behaviors Among Adolescent Boys and Girls

This study examined changes in extreme weight change attitudes and behaviors (exercise dependence, food supplements, drive for thinness, bulimia) among adolescent boys and girls over a 16 month period. It also investigated the impact of body mass index, puberty, body image, depression and positive affect on these attitudes and behaviors 16 months later. The participants were 847 young adolescents (411 boys, 436 girls). Participants completed questionnaires evaluating the above variables on three occasions, eight months apart. Girls obtained higher scores on exercise dependence, drive for thinness and bulimia. Changes in depression and body image importance were the strongest predictors of changes in these extreme attitudes and behaviors among boys; changes in depression, body dissatisfaction and body image importance were the strongest predictors for girls. The need for gender specific educational and intervention programs for adolescents are discussed.

A prospective study of pressures from parents, peers, and the media on extreme weight change behaviors among adolescent boys and girls

The current study was designed to evaluate the role of sociocultural influences over a 16 month period on strategies to lose weight, extreme weight loss strategies, and strategies to increase muscles among adolescent boys (n=344) and girls (n=246). All participants completed measures of body dissatisfaction, body image importance, strategies to lose weight, extreme weight loss strategies, and strategies to increase muscles. Measures of perceived pressure to lose weight or increase muscles from mother, father, best male friend, best female friend and the media were also evaluated. Data were gathered on three occasions, 8 months apart. The results demonstrated that boys showed a decrease in strategies to lose weight and increase muscles over time, whereas girls showed an increase. Both boys and girls showed an increase in extreme weight loss strategies with girls demonstrating a greater increase than boys. The sociocultural influences generally were perceived by girls to relate to messages to lose weight, whereas for boys they were perceived to relate to increasing muscles. Messages from parents, particularly fathers, were strong predictors of both strategies to lose weight and increase muscles among boys, with the media and best male friend playing a limited role. For girls, the strongest influences were mothers and best female friends, with few influences from fathers or the media. The results of this study are discussed in terms of the importance of the various sociocultural influences in shaping body change strategies among young adolescent boys and girls, and the implications of these findings for intervention programs for adolescents.