Weight Stigma and Mental Health in Youth: A Systematic Review and Meta-Analysis

Body mass index moderates the association between diabetes distress and objective self-management behaviours in adolescents with type 1 diabetes and elevated A1Cs

OBJECTIVE

To examine the cross-sectional associations between diabetes distress, BMI (zBMI; BMI z-score), objectively measured mean daily blood glucose readings and insulin boluses administered, and A1C in adolescents with type 1 diabetes (T1D) using insulin pumps.

METHODS

T1D self-management behaviour data were downloaded from adolescents' (N = 79) devices and mean daily frequency of blood glucose readings and insulin boluses were calculated. Diabetes distress was measured (Problem Areas in Diabetes-Teen questionnaire [PAID-T]), A1C collected, and zBMI calculated from height and weight. Three multiple linear regressions were performed with blood glucose readings, insulin boluses, and A1C as the three dependent variables and covariates (age, T1D duration), zBMI, diabetes distress, and the diabetes distress x zBMI interaction as independent variables.

RESULTS

Participants (55.7% female) were 14.9 ± 1.9 years old with T1D for 6.6 ± 3.4 years. zBMI moderated the relationship between diabetes distress and mean daily insulin boluses administered (b = -0.02, p = 0.02); those with higher zBMI and higher diabetes distress administered fewer daily insulin boluses. zBMI was not a moderator of the association between diabetes distress and blood glucose readings (b = -0.01, p = 0.29) or A1C (b = 0.002, p = 0.81).

CONCLUSIONS

Using objective behavioural data is useful for identifying how adolescent diabetes distress and zBMI affect daily bolusing behaviour amongst adolescent insulin pump users. Although distinct interventions exist to improve T1D self-management or diabetes distress, none addresses them together while considering zBMI. Decreasing diabetes distress could be especially important for youth with high zBMI.

Exploring the interplay of weight-based teasing and sociodemographic factors in adolescent weight bias internalization

OBJECTIVE

Research has highlighted the potential adverse effects of weight bias internalization (WBI) on adolescents, but there has been little examination of WBI and sources of weight teasing (family, peers, or both) or across racial/ethnic diversity of adolescents. We aimed to examine the relationship between WBI and sources of weight teasing across sociodemographic characteristics and weight status in a diverse community sample of adolescents.

METHODS

Data were collected from a U.S. sample of 1859 adolescents aged 10-17 years (59% female; 43% White, 27% Black or African American, and 25% Latino). An online questionnaire was used to assess participants' experiences of weight teasing from family members, peers, or both, and their weight status, weight-related goals, WBI, and sociodemographic characteristics.

RESULTS

Adolescents experiencing weight teasing from both family and peers reported the highest levels of WBI, while those reporting no teasing exhibited the lowest levels. These patterns were observed across sex, race/ethnicity, weight status, and weight goals, and persisted after controlling for depressive symptoms. Notably, family influences played a salient role, with adolescents reporting higher WBI if teased by family only compared to teasing from peers only. Sex and racial differences were also observed in adolescents' experiences with weight-based teasing.

CONCLUSION

Our study reveals associations between adolescent weight-based teasing, WBI, and sociodemographic factors. Weight-based teasing, whether from family and peers or from family only, was associated with increased WBI. Interventions targeting weight stigma in youth should not be limited to peer-focused efforts, but should also emphasize supportive family communication.

Dose-Dependent Association Between Body Mass Index and Mental Health and Changes Over Time

Importance

Overweight and obesity affect 340 million adolescents worldwide and constitute a risk factor for poor mental health. Understanding the association between body mass index (BMI) and mental health in adolescents may help to address rising mental health issues; however, existing studies lack comprehensive evaluations spanning diverse countries and periods.

Objective

To estimate the association between BMI and mental health and examine changes over time from 2002 to 2018.

Design, Setting, and Participants

This was a repeated multicountry cross-sectional study conducted between 2002 and 2018 and utilizing data from the Health Behaviour in School-aged Children (HBSC) survey in Europe and North America. The study population consisted of more than 1 million adolescents aged 11 to 15 years, with all surveyed children included in the analysis. Data were analyzed from October 2022 to March 2023.

Main Outcomes and Measures

Mental health difficulties were measured by an 8-item scale for psychological concerns, scoring from 0 to 32, where a higher score reflects greater psychosomatic issues. BMI was calculated using weight divided by height squared and adjusted for age and sex. Data were fitted by multilevel generalized additive model. Confounders included sex, living with parents, sibling presence, academic pressure, the experience of being bullied, family affluence, screen time, and physical activity.

Results

Our analysis of 1 036 869 adolescents surveyed from 2002 to 2018, with a mean (SD) age of 13.55 (1.64) years and comprising 527 585 girls (50.9%), revealed a consistent U-shaped association between BMI and mental health. After accounting for confounders, adolescents with low body mass and overweight or obesity had increased psychosomatic symptoms compared to those with healthy weight (unstandardized β, 0.14; 95% CI, 0.08 to 0.19; unstandardized β, 0.27; 95% CI, 0.24 to 0.30; and unstandardized β, 0.62; 95% CI, 0.56 to 0.67, respectively), while adolescents with underweight had fewer symptoms (unstandardized β, -0.18; 95% CI, -0.22 to -0.15). This association was observed across different years, sex, and grade, indicating a broad relevance to adolescent mental health. Compared to 2002, psychosomatic concerns increased significantly in 2006 (unstandardized β, 0.19; 95% CI, 0.11 to 0.26), 2010 (unstandardized β, 0.14; 95% CI, 0.07 to 0.22), 2014 (unstandardized β, 0.48; 95% CI, 0.40 to 0.56), and 2018 (unstandardized β, 0.82; 95% CI, 0.74 to 0.89). Girls reported significantly higher psychosomatic concerns than boys (unstandardized β, 2.27; 95% CI, 2.25 to 2.30). Compared to primary school, psychosomatic concerns rose significantly in middle school (unstandardized β, 1.15; 95% CI, 1.12 to 1.18) and in high school (unstandardized β, 2.12; 95% CI, 2.09 to 2.15).

Conclusions and Relevance

Our study revealed a U-shaped association between adolescent BMI and mental health, which was consistent across sex and grades and became stronger over time. These insights emphasize the need for targeted interventions addressing body image and mental health, and call for further research into underlying mechanisms.

Weight stigma and mental health outcomes in early-adolescents. The mediating role of internalized weight bias and body esteem

BACKGROUND

Weight stigma is increasingly common in early adolescence and may lead to weight bias internalization, with negative consequences for mental health outcomes. This study aimed to: examine the relations of perceived weight stigma and internalized weight bias with early adolescents' internalizing symptoms and disordered eating behavior; explore the mediating role of internalized weight bias on the relations of perceived weight stigma with internalizing symptoms and disordered eating behaviors; examine body esteem as a mediator between internalized weight bias and mental health outcomes.

METHODS

A sample of 406 early adolescents (59.6% girls) aged between 11 and 13 participated in this cross-sectional study. They completed self-report measures assessing perceived weight stigma, internalized weight bias, body esteem, internalizing symptoms and disordered eating.

RESULTS

Path analysis indicated that perceived weight stigma was positively related with internalizing symptoms and internalized weight bias. Further, internalized weight bias was negatively related with body esteem and positively related with internalizing symptoms and disordered eating. Internalized weight bias mediated the relations of perceived weight stigma with internalizing symptoms, disordered eating and body esteem. Further, body esteem mediated the relations of internalized weight bias with internalizing symptoms and disordered eating behavior.

CONCLUSIONS

The findings highlight internalized weight bias as a psychological mechanism potentially explaining negative links of weight stigma with internalizing symptoms and disordered eating in early adolescence. The results emphasize the need for early intervention during this developmental stage, in order to prevent psychological and behavioral outcomes of weight stigma and internalized weight bias.

Exploring the association between internalized weight bias and mental health among Canadian adolescents

BACKGROUND

Internalized weight bias (IWB) has been identified as a correlate of higher depressive and anxiety symptoms in adolescents with higher weights. However, there has been limited investigation into how IWB relates to positive mental health and whether these associations differ across genders.

OBJECTIVES

To examine the associations between IWB and mental health (depression, anxiety, flourishing) in adolescents with higher weights, and to test the potential moderating role of gender.

METHODS

Canadian adolescents with higher weights (N = 7538, 60% boys, 36% girls, 4% gender diverse, ages 12-19) from the COMPASS study completed a survey during the 2021-2022 school year. Data were analysed using generalized linear models.

RESULTS

Highest IWB and poorest mental health were noted within gender diverse adolescents, followed by girls then boys. Gender moderated the relationship between higher IWB and higher depression, higher anxiety and lower flourishing, with the strongest relationships noted among girls.

CONCLUSION

IWB interventions should be tailored to gender subgroups that may be particularly vulnerable to maladaptive mental health outcomes associated with IWB. System-level changes that mitigate perpetuation of weight bias and discrimination which lead to IWB are also essential, particularly for girls.

Adolescent Females' Dyadic Conversations About Body, Weight, and Appearance

Body talk among adolescent females has been associated with negative outcomes, including depressed mood, disordered eating, and body dissatisfaction. Yet, little work has investigated the manifestation of body talk in actual conversations between adolescent females or explored pathways through which body talk is spread (e.g., co-rumination). The present study examined body talk among adolescent female dyads (N = 23 dyads) ages 13 to 17 (Mage = 15.12) using an observational design. Reciprocally nominated dyads were recruited from a high school in the southeastern United States. Conversations between dyads were qualitatively coded using an applied thematic analysis approach. Identified themes were related to weight, appearance, and personality. Results provide insight into the social context in which sociocultural norms of weight stigma, body dissatisfaction, and eating-related psychopathology may be reinforced. Findings have implications for informing the development of interventions to reduce co-rumination of negative weight- and appearance-related body talk and to promote positive body image and healthy weight among adolescent girls.

Childhood obesity and adolescent follow-up depressive symptoms: exploring a moderated mediation model of body esteem and gender

Obesity is a well-recognized risk factor for adolescent depressive symptoms, but mediating mechanisms of this association have scarcely been studied. This study is unique in examining an indirect pathway of this link via body esteem (BE) prospectively from childhood (8-12 years) to adolescence (13-18 years). In addition, potential gender moderation was examined. This study utilized data from a case-control study comparing 100 children with and without obesity matched on important confounders (age, gender, and socioeconomic status). Our findings provide support for the mediating role of BE in the link between childhood weight status and adolescent depressive symptoms at a 5-year follow-up. This mediation effect did not differ between boys and girls. The findings suggest the relevance of specifically targeting children's BE in preventive intervention programs among children with obesity to prevent future mental health problems.

Stigma-Generating Mechanisms in Families Enrolled in a Pediatric Weight Management Program: A Qualitative Study of Health Identities and Healthcare Authenticity

In recent years, there has been increased awareness of obesity as a condition that carries a high level of stigma, as well as growing recognition of its prevalence and harm. Despite the increasing body of research on this topic, there is a gap in the literature regarding mechanisms that generate or exacerbate perceptions of weight stigma, especially within families and pediatric healthcare settings. The present study aims to identify potential stigma-generating mechanisms by focusing on inter-relational dynamics within these contexts. We conducted in-depth, semi-structured interviews with 11 families and analyzed the data by applying sociological theories on health identities and authenticity. Our study found four themes that represent potential stigma-generating mechanisms by being explicitly related to familial health identities and healthcare authenticity: (1) negotiating and reconstruction familial self-understanding, (2) between guilt, shame and conflicts, (3) navigating weight perceptions, and (4) the necessity of positivity and relevance. Our study shows the complexities of weight stigma within family and pediatric healthcare settings, emphasizing the need for sensitive and tailored support, as well as the value of working authentically as crucial aspects in preventing and/or reducing stigma.

Weight Stigma and Mental and Emotional Health Among Sexual and Gender Minority Individuals: A Scoping Review

Purpose: Weight stigma is associated with poor mental and emotional health and may be especially harmful to sexual and gender minority (SGM) individuals due to co-occurring minority stress. The literature on this topic has not been synthesized. We conducted a scoping review of the literature on weight stigma and mental and emotional health among SGM individuals to synthesize findings, highlight gaps, and identify clinical and research implications. Methods: Following Preferred Reporting Items for Systematic Reviews and Meta-Analyses extension for Scoping Reviews, we searched PubMed, CINAHL, PsycINFO, and Scopus in April 2022. Included studies examined the relationship between weight stigma and mental and emotional health among SGM people of any age. We did not restrict study design or publication date. Results: Of 513 records identified, 23 met inclusion criteria. Most focused on sexual minority individuals; one focused specifically on gender minority individuals. Weight stigma was associated with poorer mental and emotional health in nearly all studies. The most common outcomes examined were self-esteem, maladaptive eating, and depressive symptoms. Five studies, all using the same dataset, focused on adolescents; none focused on older adults. Conclusions: Weight stigma is associated with poorer mental and emotional health among SGM individuals and, through its intersections with minority stress, might impact SGM individuals differently than their cisgender and heterosexual counterparts. There are important gaps regarding weight stigma's effect on SGM adolescents and gender minority individuals and its relationship with a broader range of mental and emotional health outcomes.

Pivot from Pain to Productive: Conversations about Weight Management in Youth with Obesity

ABSTRACT

The prevalence of childhood obesity is almost 20% and affects 14.7 million youth. It is not a matter of if but when and how often sports medicine clinicians will care for patients with obesity. Considering the social, emotional, medical, and physical impact of obesity, we need a nuanced approach to communicate with patients and develop effective treatment plans to maintain or encourage physical activity. Neuromusculoskeletal impairments, physical complications, pain, biomechanical differences, and physical deconditioning act as potential barriers to treatment. This article introduces ways to pivot the conversation from musculoskeletal pain to a productive, well-received conversation about a holistic approach to weight management that also promotes physical activity and overall wellness in youth with obesity. Special attention is given to equipping clinicians with recommendations that incorporate the use of inclusive language, health behavior theories, and tenets of motivational interviewing to deliver equitable treatment regardless of body habitus.

The relationship between internalized weight stigma and physical and mental health-related quality of life in a large sample of women: a structural equation modeling analysis

PURPOSE

Health-related quality of life (HRQOL) refers to an individual's perception of their physical and mental health status over time. Although emerging evidence has documented a negative association between weight stigma (i.e., negative weight-related attitudes and beliefs towards individuals with overweight or obesity) and mental HRQOL, its influence on physical HRQOL still needs to be fully clarified. This study aims to investigate the impact of internalized weight stigma on mental and physical HRQOL by employing a structural equation modeling (SEM) approach.

METHODS

The Short Form Health Survey 36 (SF-36) and the Weight Bias Internalization Scale (WBIS) were administered to a sample of 4450 women aged 18-71 (M_age = 33.91 years, SD = 9.56) who self-identified in a condition of overweight or obesity (M_BMI = 28.54 kg/m²; SD = 5.86). Confirmatory factor analysis (CFA) was conducted to assess the dimensionality of the scales before testing the proposed structural model.

RESULTS

After establishing the adequacy of the measurement model, SEM results revealed that internalized weight stigma was significantly and negatively associated with both mental (β = - 0.617; p < 0.001) and physical (β = - 0.355, p < 0.001) HRQOL.

CONCLUSION

These findings offer additional support to prior research by confirming the association between weight stigma and mental HRQOL. Moreover, this study contributes to the existing literature by strengthening and extending these associations to the physical HRQOL domain. Although this study is cross-sectional in nature, it benefits from a large sample of women and the use of SEM, which offers advantages over traditional multivariate techniques, e.g., by explicitly accounting for measurement error.

LEVEL OF EVIDENCE

Level V, descriptive cross-sectional study.

Weight stigma and bias: A guide for pediatric clinicians

Introduction

Many children and adolescents with obesity experience weight stigma and bias, which can have detrimental mental health, medical, and social consequences. Weight stigma in the healthcare setting threatens the therapeutic relationship between health care providers and their pediatric patients and families.

Methods

Data supporting this guidance were derived from cited references.

Results

Based upon referenced citations, this review offers 7 best practices for pediatric providers to work to reduce weight stigma including: assess for personal weight bias, improve communication, provide a welcoming clinic environment, seek out additional training and informative experiences, evaluate the messaging and culture of the organization, screen for trauma and bullying, and enlist the help of board-certified obesity medicine specialists.

Conclusions

Providers have an important role in mitigating the harmful effects of weight stigma. It is our hope these recommendations, as well as the other resources provided, will help providers to begin to address their own individual weight biases, as well as the institutional weight biases where we care for patients.

Weight Stigma and Barriers to Effective Obesity Care

Weight stigma is prevalent with negative consequences for health and well-being. This problem is present in health care; stigmatizing attitudes toward patients with obesity are expressed by medical professionals across diverse specialties and patient care settings. This article summarizes the ways in which weight stigma creates barriers to effective care, including poor patient-provider communication, reduced quality of care, and healthcare avoidance. Priorities for stigma reduction in healthcare are discussed, with a clear need for multifaceted approaches and inclusion of people with obesity whose perspectives can inform strategies to effectively remove bias-related barriers to patient care.

Functionality appreciation is inversely associated with positive psychotic symptoms in overweight/obese patients with schizophrenia

BACKGROUND

While the relationship between negative aspects of body image and positive schizophrenia symptoms was extensively investigated and is relatively well-established, there is a dearth of literature on the relationship between positive symptoms and positive aspects of body image, such as body appreciation and functionality appreciation, in patients with schizophrenia. This study aimed to (1) compare weight stigma, body and functionality appreciation between obese/overweight and normal-weight patients with schizophrenia, and (2) explore the associations between these variables and positive psychotic symptoms in the obese/overweight group.

METHOD

A cross-sectional study was conducted in the Psychiatric Hospital of the Cross, Lebanon during September 2022 recruiting selected in-patients diagnosed with schizophrenia. Patients were classified as overweight/obese if they had a BMI > 25 (N = 76 (37.25%), aged 55.57 ± 11.30 years, 42.6% females). The Weight self‑stigma questionnaire, the Functionality Appreciation Scale, and the Body Appreciation Scale, and the Positive and Negative Syndrome Scale (PANSS) were used.

RESULTS

No significant difference was found between overweight/obese and normal-weight patients for all variables, except for weight stigma; a significantly higher weight stigma score was significantly found in overweight/obese compared to normal-weight patient. In the bivariate analysis, higher functionality appreciation was significantly associated with higher positive PANSS scores. The results of the linear regression, taking the positive PANSS score as the dependent variable, showed that higher functionality appreciation (Beta = - 0.52) and higher social support (Beta = - 0.16) were significantly associated with lower positive PANSS scores, whereas having a secondary education level compared to illiteracy (Beta = 7.00) was significantly associated with higher positive PANSS scores.

CONCLUSION

Although based on cross-sectional data, these findings preliminarily suggest that higher functionality appreciation can help reduce the severity of positive psychotic symptoms in overweight/obese schizophrenia patients, and that interventions aimed at improving functionality appreciation could be regarded beneficial therapeutic targets in the treatment of psychosis.

Support for weight-related anti-discrimination laws and policies: Modelling the role of attitudes toward poverty alongside weight stigma, causal attributions about weight, and prejudice

In the present study, we sought to position support for weight-related anti-discrimination laws and policies within a broader political and socioeconomic context. Specifically, we hypothesised that individualistic (rather than structural) anti-poverty attitudes would provide the basis for negative weight-related dispositions. To test this hypothesis, we asked 392 respondents from the United Kingdom to complete measures of support for weight-related anti-discrimination laws and policies, attributions about the causes of being larger-bodied, and weight-related stigma and prejudice. Path analysis with robust maximum likelihood estimation indicated that greater individualistic anti-poverty attitudes were significantly and directly associated with lower support for weight-related anti-discrimination laws and policies. This direct association was also significantly mediated by weight-related stigma and via a serial mediation involving both weight-related stigma and prejudice. Although greater individualistic anti-poverty attitudes were significantly associated with greater personal attributions for being larger-bodied, the latter did not emerge as a significant mediation pathway. The present findings highlight the importance of considering broader political and socioeconomic contextual factors that may provide a basis for the development, maintenance, and manifestation of negative weight-related dispositions.

An integrative model of weight stigma, body image, and physical activity in adolescents

Negative weight-related experiences and internalized weight stigma have been associated with poorer body image and reduced physical activity in adolescents. However, exploring body image and physical activity as discrete weight stigma outcomes fails to consider the theoretically- and empirically-supported covariation between the two. The present study tested a novel integrated model of the associations among negative weight-related experiences and internalized weight stigma (via weight-related distress), body image (shame, authentic pride, body appreciation), and physical activity. Canadian adolescents (N = 311, M_age ± SD = 16.00 ± 1.01, 75.5% girls) completed a cross-sectional self-report survey. A structural equation model with maximum likelihood robust estimation was tested. Higher negative weight-related experiences were indirectly associated with poorer body image (i.e., higher shame; lower authentic pride and appreciation) through higher weight-related distress. Authentic pride was associated with moderate-to-vigorous physical activity. Higher negative weight-related experiences were indirectly associated with lower physical activity through higher weight-related distress and lower body-related authentic pride. These findings elucidate targetable individual mechanisms and larger systems that could improve body image and foster physical activity among adolescents who encounter negative weight-related experiences and internalized weight stigma.

Temporal Changes in Energy-Balance Behaviors and Home Factors in Adolescents with Normal Weight and Those with Overweight or Obesity

This study aimed to examine the temporal changes in energy-balance behaviors and home factors in adolescents with normal weight and those with overweight or obesity (OWOB). Adolescents or parent proxies completed survey assessments two to four years before (T0; n = 82 ), ≤ six months before (T1; n = 68 ), and ≤ three months after the COVID-19 pandemic outbreak (T2; n = 82 ), to capture energy-balance behaviors (i.e., physical activity [PA], screen time, sleep) and home factors (i.e., food environment, food worry, parent support for PA). At T0 and T1 (before pandemic), participants visited our laboratory for anthropometric measurements. At T2, parent proxies also completed a survey to report the COVID-19 pandemic exposure and impact. The participating families experienced moderate levels of pandemic exposure and impact, although exposure was higher in the OWOB group F 1,78 = 5.50 , p < . 05 . Repeated-measure multivariate analyses of covariance (RM-MACOVAs) did not show significant time by weight status interaction effects (p > 0.05 ; adjusted for race and sex). However, the models detected significant time (T0 vs. T2) by race (White vs. non-White) interaction effect λ 7,66 = 0.81 , p < 0.05 , with greater increase in food worry F 1,72 = 4.36 , p < . 05 but less increase in screen time F 1,72 = 4.54 , p < . 05 among the non-White group. Graphical visualization depicted some favorable change patterns in adolescents with normal weight (vs. those with OWOB) for certain behaviors and home factors (e.g., number of days per week ≥ 60 mins PA, food worry). These findings suggest that the COVID-19 pandemic exerted greater adverse effects on adolescents with OWOB and specifically on screen time and food worry among non-White adolescents.

Care of Gender Diverse Youth with Obesity

PURPOSE OF REVIEW

The relationships between gender identity, body image, and gender expression are complex, requiring a gender affirming approach to address weight management. This purpose of this review is to describe the essentials to caring for gender diverse youth, as well as the differences and intersections among those with obesity.

RECENT FINDINGS

Gender-affirming hormone therapy may lead to abnormal weight gain and increased body mass index, or worsen obesity and exacerbate weight-related complications. Moreover, given the high prevalence of victimization, marginalization, and stigmatization among gender diverse people and youth with obesity, care guidelines and treatment goals should also include reducing the negative impact of social-related complications. Despite the overlap in clinical care and lived experiences that impact the health of gender diverse youth with obesity, there is very little research to help guide clinicians. Careful attention to medical and behavioral comorbidities, barriers to care, and health disparities can inform clinical practice. Future research that specifically addresses nuances to care for gender diverse youth with obesity can help to establish standards of care to address their unmet needs and further support clinicians, patients and their families.

Effects of Weight-Related Self-Stigma and Smartphone Addiction on Female University Students' Physical Activity Levels

Physical inactivity is a common health problem in female college students, and factors such as weight self-stigma and smartphone addiction may negatively impact physical activity in this population. The aim of the current study was to investigate the associations between these variables and identify the moderating effects of smartphone addiction between weight stigma and physical activity. Using a cross-sectional study, information on the level of physical activity in the past week, weight-related self-stigma, and smartphone addiction, as well as demographics, were collected via an online survey from 391 female college students in Taiwan. Participants in two groups of moderate to high and low physical activity were compared using a zero-order bivariate correlation in terms of independent variables. A moderated mediation model using Model 14 in the Hayes’ PROCESS macro with 1000 bootstrapping resamples was applied to assess moderation effects. There were significant differences in terms of weight status, smartphone addiction, and weight stigma between active and inactive groups (p < 0.001). All independent variables except for age were positively correlated (0.14 < r < 0.45). Multivariate regression models indicated that weight status was associated with weight stigma (odds ratio [OR] = 9.13, p < 0.001; 95% CI = 6.90, 11.35). Weight status (OR = 0.47, p = 0.03; 95% CI = 0.23, 0.93), weight stigma (OR = 0.96, p = 0.03; 95% CI = 0.922, 0.997), and smartphone addiction (OR = 0.11, p = 0.003; 95% CI = 0.03, 0.47) were associated with physical activity. The moderating role of smartphone addiction on the association between weight stigma and physical activity was also identified (OR = 1.05, p = 0.049; 95% CI = 1.0001, 1.1004). The moderating effect of smartphone addiction on the association between weight stigma and physical activity suggests that designing interventions to address the negative impacts of both weight stigma and smartphone addiction may help to improve physical activity in female college students.