An interventional study of Young Athlete Body Project in Eating Disorders in Adolescence, Body Dissatisfaction and Mental Health, sponsored by Norwegian School of Sport Sciences. Recruiting at 2 sites in Norway. Open to participants aged 13 Years to 17 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2026-08-31.
Sponsored by Norwegian School of Sport Sciences · Not applicable, Interventional, and Prevention
Body dissatisfaction is common among adolescents and is a well-established risk factor for the development of eating disorders. Young athletes may be particularly vulnerable because they are exposed to appearance-related pressures from both society and sport environments. Despite the high prevalence of body dissatisfaction and eating disorders among young athletes, there is a lack of evidence-based, large scale prevention programs specifically designed for young athletes.
The Young Athlete Body Project is an age- and sport-adapted version of the evidence-based Body Project, a cognitive dissonance-based prevention program that has been shown to reduce body dissatisfaction, internalization of appearance ideals, and eating disorder risk in adolescents and adults from diverse population groups. A pilot study of the Young Athlete Body Project among adolescent athletes demonstrated that the program was acceptable and perceived as beneficial by participants. The findings also indicated promising improvements in the internalization of the thin body ideal and increased awareness of appearance-related pressures, supporting the need for further evaluation in a larger randomized controlled trial.
The aim of the present study is to evaluate the effectiveness of the Young Athlete Body Project among adolescent athletes attending sports-specialized lower and upper secondary schools in Norway. The program aims to promote positive body image and body acceptance, reduce the internalization of appearance ideals, strengthen resistance to appearance-related pressures, and prevent body dissatisfaction and eating disorders among adolescent athletes.
The intervention program will contribute with new evidence-based knowledge on the effect of a prevention program targeting body dissatisfaction and eating disorders among adolescents athletes.
This study is a school-based cluster-randomized controlled trial conducted among adolescent athletes attending sports-specialized lower and upper secondary schools in Norway.
Based on statistical power analyses, approximately 1740 adolescent athletes aged 13-17 years are expected to participate in the study. The sample size calculation was based on effect sizes observed in the pilot study of the Young Athlete Body Project (0.40 for thin-ideal internalization and 0.23 for muscularity-ideal internalization), a significance level of α = 0.05, and 80% statistical power. The calculation accounted for the clustered study design by assuming an average cluster size of 60 students per school and an intraclass correlation coefficient (ICC) of 0.02. In addition, the sample size was adjusted for an anticipated attrition rate of up to 25%. Based on these assumptions, between 291 and 867 participants are required per study arm. To ensure adequate power for all primary outcomes and follow-up assessments, approximately 1740 participants will be recruited.
Participating schools will be randomized to either the intervention group or control group. Randomization will be conducted at the school level to minimize contamination between participants within schools. Data will be analyzed according to the intention-to-treat principle. Intervention effects will be evaluated using linear mixed-effects regression models with a random intercept for school to account for clustering at the school level.
The intervention, Young Athlete Body Project, is delivered during school hours over a five-week period and consists of two digital educational sessions followed by three in-person workshops. The educational sessions focus on (1) energy availability, nutrition, biological maturation and puberty in young athletes and (2) social media, body ideals and mental health in sport. These topics are part of the existing curriculum in sports-specialized lower and upper secondary schools and provide the foundation for the subsequent workshop activities. Students attending schools randomized to the intervention group will receive the educational sessions and take part in the workshops as part of their school program. Participation in the research component of the study, including completion of questionnaires and other study-related assessments, is voluntary and requires informed consent.
The workshops are conducted in small sex-specific groups of approximately ten participants and are led by trained instructors following a standardized intervention manual. The workshop content is adapted from the evidence-based Body Project and is based on cognitive dissonance principles. Through guided discussions, role-play activities, reflective exercises and written assignments, participants are encouraged to critically examine appearance ideals, body appearance pressures and sociocultural influences related to body image. The workshops also focus on strengthening body acceptance, reducing internalization of appearance ideals and developing strategies to cope with appearance-related pressures from sport, social media and society.
Data will be collected using self-report questionnaires administered at baseline, immediately following the intervention, and at 6-, 12-, and 24-month follow-up assessments. Outcomes will be assessed using the Body Appreciation Scale-2 (BAS-2), the Sociocultural Attitudes Towards Appearance Questionnaire-4 (SATAQ-4), the Eating Disorder Examination Questionnaire short form (EDE-Q short form), and additional questions assessing mental health and psychosocial functioning. In addition, a randomized subsample of participants will be invited to participate in qualitative interviews to evaluate their experiences with and perceived benefits of the program. All participants scoring ≥15 on the EDE-Q short form, together with a sex-matched sample of participants scoring below this cut-off, will be invited to complete the Eating Disorder Examination (EDE), a structured diagnostic interview assessing eating disorder symptoms, behaviors, and related cognitions. These interviews will be used to strengthen the validity of self-reported questionnaire data and provide a more comprehensive assessment of eating disorder outcomes.
The study will evaluate both short-term and long-term effects of the intervention and provide evidence regarding the effectiveness of a school-based body image and eating disorder prevention program specifically adapted for adolescent athletes.
645 studies on the registry are indexed under Feeding and Eating Disorders; 153 are open to participants now.
This study's planned enrollment of 1,740 is above the median of 71 across 452 interventional studies indexed under Feeding and Eating Disorders.
Browse Feeding and Eating Disorders studies →Norwegian School of Sport Sciences is the lead sponsor of 46 studies on the registry; 6 are open to participants now.
Compared within Feeding and Eating Disorders, this study's primary condition as ClinicalTrials.gg classifies it; the registry's first condition term is Psychological Well-Being. The counts are of registry records indexed under each term, refreshed daily. How we classify →
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Exclusion Criteria:
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Informed consent
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Participants receive the Young Athlete Body Project intervention, a five-week program consisting of two 60-minute digital educational sessions and three 60-minute instructor-led group workshops. The program addresses nutrition, health, social media, body image, and mental health in sport, and includes dissonance-based activities designed to reduce body dissatisfaction and body ideal internalization.
Behavioral: Young Athlete Body Project
Participants in the control group receive one 60-minute digital educational session covering nutrition, health, social media, body ideals, and mental health in sport.
The Young Athlete Body Project is a five-week school-based intervention consisting of two 60-minute digital educational sessions followed by three 60-minute instructor-led group workshops. The educational sessions cover (1) nutrition in relation to health, puberty, and athletic performance, and (2) social media, body ideals, and mental health in sport. The workshop component is delivered in small, gender-specific groups and is based on kognitive dissonance theory. Workshop activities focus on reducing internalization of appearance ideals, promoting positive self-talk, critically evaluating media influences, and developing strategies for managing body-related pressures in sport. The intervention is adapted for adolescent athletes and tailored to the sporting context. All workshops are delivered according to a standardized manual by trained instructors.
Also known as: YABP intervention
Short- and long-term effect of the Young Athlete Body Project intervention on internalization of thinness and muscularity ideals
Change in internalization of thinness and muscularity ideals from baseline to post-intervention and follow-up, using the internalization subscales of the Sociocultural Attitudes Towards Appearance Questionnaire-4 (SATAQ-4). Items are rated on a Likert scale, with higher scores indicating greater internalization of thinness and muscularity ideals.
Time frame: Baseline, post-intervention (5 weeks), 6 months, 12 months, and 24 months after intervention.
Short- and long-term effects of the Young Athlete Body Project intervention on body appreciation
Change in body appreciation from baseline to post-intervention and follow-up, measured using the Body Appreciation Scale-2 (BAS-2). Items are rated on a 5-point Likert scale, with higher scores indicating greater body appreciation.
Time frame: Baseline, post-intervention (5 weeks), 6 months, 12 months, and 24 months after intervention.
Short- and long-term effect of the Young Athlete Body Project intervention on eating disorder symptoms
Change in eating disorder symptoms using the Eating Disorder Examination Questionnaire Short Form (EDE-QS). Scores range from 0 to 3, with higher scores indicating more severe eating disorder symptoms.
Time frame: Baseline, post-intervention (5 weeks), 6 months, 12 months, and 24 months after intervention.
Acceptability of the Young Athlete Body Project intervention among adolescent athletes
Acceptability of the intervention among participating students assessed through qualitative interviews conducted after completion of the intervention. The assessment will explore participants' experiences with the intervention content, delivery format, perceived relevance, satisfaction, and perceived benefits.
Time frame: Post-intervention (5 weeks)
Plan to share: No — Individual participant data will not be publicly shared due to privacy and confidentiality considerations involving adolescent participants.
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Norwegian School of Sport Sciences