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Schools are ideal settings to promote adolescent physical activity (PA), yet school-based interventions have shown limited long-term impact. This position paper presents key issues surrounding school-based PA interventions. Collaborative conceptual thinking drawing on multi-author expertise and available evidence advanced our understanding and opinion. Key arguments: 1) the adoption of a systems approach, which maximizes partnership action and leverages policy, is crucial for understanding the complexities of implementing whole-school programs; 2) a reorientation to an assets perspective optimizes existing strengths and resources allowing greater emphasis on the full range of physical, cognitive, emotional and social benefits that PA provides, and 3) a move beyond traditional positivist research designs to advance our knowledge of what works better, for whom and in what context is needed for greater progress We provide suggestions, specifically advocating for systems approaches, as a realistic way to improve how we support PA in schools in the future. [ABSTRACT FROM AUTHOR]

Objective: To identify family- and school-based correlates of specific energy balance-related behaviours (physical activity, sedentary behaviour, breakfast consumption, soft drink consumption) among 10-12-year-olds, using the EnRG framework (Environmental Research framework for weight Gain prevention).Design: A literature review to identify observational studies exploring at least one family- or school-based correlate of the specific behaviours, resulting in seventy-six articles.Setting: Eighteen studies were conducted in Europe, forty-one studies in North America and seventeen studies in Australasia.Subjects: Healthy children aged 10-12 years.Results: Parental and maternal physical activity, doing physical activities with parents and parental logistic support were identified as the most important, positive correlates of physical activity. Parental rules was the most important correlate of sedentary behaviour and was inversely related to it. School socio-economic status was positively related to physical activity and inversely related to sedentary behaviour. The available studies suggested a positive relationship between soft drink availability at home and consumption. Soft drink availability and consumption at school were the most important school-based correlates of soft drink consumption. A permissive parenting style was related to more soft drink consumption and less breakfast consumption.Conclusions: An important role has been awarded to parents, suggesting parents should be involved in obesity prevention programmes. Despite the opportunities a school can offer, little research has been done to identify school-environmental correlates of energy balance-related behaviours in this age group. Obesity prevention programmes can focus on the most important correlates to maximize the effectiveness of the programme. Future research should aim at longitudinal studies. [ABSTRACT FROM AUTHOR]

Background: Adapting co-creation research processes and/or public health interventions improves the fit between the intervention and population of interest, potentially resulting in more relevant and effective interventions. Mode 2 research approaches (e.g., co-creation, co-production, co-design, community-based participatory research, and participatory action research) can ensure that adaptations fit the socio-cultural and economic contexts. However, an overview of existing practices and how to co-adapt is lacking. This study aimed to provide an overview of the use of co-adaptation in co-creation processes and/or public health interventions., Methods: We conducted a rapid review search on the Health CASCADE co-creation database. Relevant peer-reviewed studies reporting on co-adaptation of public health interventions were identified. A call for case studies via social media and co-authors' snowballing was issued to perform interviews with co-creation researchers gaining insights into how co-adaptation was applied from unpublished studies and practice. Interviews were analysed using template analysis., Results: Fourteen studies addressed various public health issues by co-adapting co-creation processes, intervention activities, communication platforms, monitoring strategies, training components, and materials' language and tone. Most studies lacked detailed reporting on the co-adaptation process, though some provided information on group composition and number, duration, and methods applied. Two out of 14 studies used a framework (i.e., Intervention Mapping Adapt), seven described their adaptation procedure without naming a specific framework, and five did not report any procedures or frameworks. Five of seven case studies used adaptation frameworks (e.g., ADAPT guidance). Interviews provided insights into the co-adaptation process emphasising the importance of contextual fit, integrating prior knowledge, and logging adaptations., Conclusions: This study is the first introducing the concept of and exploring co-adaptation of co-creation processes and/or public health interventions. It provides details regarding adaptations made, whether and which frameworks were used, and procedures applied to adapt. The findings highlight the need for tailored frameworks for co-adaptation and better reporting of co-adaptation processes., Competing Interests: Declarations. Ethics approval and consent to participate: Ethical approval was granted with code 2122003 by the Ethics Committee of the faculty of Psychology, Education and Sport Sciences at Blanquerna – Ramon Llull University. Written informed consent was obtained from all interview participants who were not co-authors. Consent for publication: Not applicable. Competing interests: The authors declare no competing interests., (© 2025. The Author(s).)

Objectives: Co-adaptation is a collaborative process to adapt existing interventions to new contexts and offers a promising way to scale (co-created) public health interventions. However, there is limited understanding of how co-adaptation processes are experienced. This study examined whether a robust co-creation process can be maintained when adapting a previously co-created intervention to promote adolescents' healthy sleep. Adolescents' experiences during this co-adaptation process were explored, using five key dimensions of co-creation (1) multistakeholder collaborative action, 2) co-learning towards innovation, 3) contextual knowledge production, 4) generating meaning, 5) open, trustful, and inclusive dialogue) as the guiding framework., Study Design: Qualitative observational study., Methods: Qualitative data were collected from a co-adaptation process with an action group of adolescents (n = 8) and researchers (n = 2). Over eleven sessions (50 min) following Intervention Mapping, a needs assessment was conducted, and the original intervention's goals and materials were adapted. Data sources included session transcripts, facilitator reflections, adolescent evaluations (n = 5), and focus group transcripts (n = 3), elaborating on adolescents' experiences during sessions, and were analysed using Qualitative Content Analysis (QCA)., Results: All five dimensions of co-creation were reflected in adolescents' experiences of co-adapting the healthy sleep intervention. They enjoyed collaborating, committed to the project, reported ongoing possibilities for learning, and produced contextual knowledge from their lived experiences. The process felt meaningful, with a respectful atmosphere. However, challenges like the exclusion of students outside the group and time constraints were also encountered., Conclusions: The presence of the five dimensions of co-creation in this study demonstrates that robust co-creation research can be maintained also when co-adapting a previously co-created intervention to a new context with a new group of stakeholders., (Copyright © 2025 The Authors. Published by Elsevier Ltd.. All rights reserved.)

Objective: Sleep deprivation and reduced sleep quality are common in adolescents and negatively impact their physical and mental wellbeing. This study evaluates the effect of a participatory-developed school-based healthy sleep intervention for adolescents., Method: A 16-week long intervention, cocreated with adolescents, was conducted with two schools with four schools serving as measurement-only controls. Intervention elements included a kickoff event, posters, Instagram posts, an application, and class activities. Data on sleep parameters, sleep hygiene, and psychosocial factors were collected before, immediately after, and 6 months after implementation ( N = 1,176; 15.2 ± 0.7 years; 37.9% girls). Sleep duration was objectively measured with activity trackers in a subsample ( n = 133). Generalized linear mixed models were applied to analyze the intervention effect in RStudio., Results: Participants in the intervention group demonstrated significant increases in sleep knowledge and larger decreases in supportive peer and parental factors compared to the control group. At 6 months, the intervention group displayed increased self-reported weekend sleep duration and objectively measured week sleep duration. There was a significantly smaller increase in the use of screens in bed and barriers toward screen use in bed in the intervention group compared to the control group. Finally, a significant decrease in peer modeling and mental support of parents was observed in the intervention group (versus significant increase and no significant change in the control group, respectively)., Conclusion: Researchers developing healthy sleep interventions should consider combining a participatory approach with a theory-based protocol including the use of active parental components. (PsycInfo Database Record (c) 2025 APA, all rights reserved).

The transition from secondary school to college or university is a well-known and well-studied risk period for weight and/or fat gain and not meeting the dietary recommendations. Higher education acts as a promising setting to implement nutrition interventions. An important condition for intervention success is that interventions are implemented as intended by the protocol and integrated in the institutional policy. Unfortunately, to date, there is only little understanding of the factors influencing adoption and implementation of nutrition interventions in higher education settings. This study aimed to provide insight into stakeholders' perspectives on facilitators and barriers to adoption and implementation of nutrition interventions promoting healthy and sustainable diets among higher education students in Flanders. Eight online group interviews and three online individual interviews were conducted involving a total of 37 stakeholders (e.g., staff of student services and student restaurants) from ten Flemish higher education institutions with varying food policy quality scores, and one external catering company which provides catering in higher education institutions. A semi-structured interview guide based on the Consolidated Framework for Implementation Research (CFIR-framework) was used to facilitate the interviews. Afterwards, the data were analyzed using a combined inductive and deductive thematic approach led by the CFIR-framework. Most of the institutions' food policies focused on the provision and promotion of healthy and sustainable nutrition. Therefore, the reported factors in the present study consequently relate primarily to these two strategies. Stakeholders preferred to adopt low cost and institution-tailored interventions supported by experts and evidence, considering them easier and less resourceful to implement in the specific context of the institution. They stressed the importance of considering both students' and institution stakeholders' needs and perspectives in the development of nutrition interventions and implementation plans. Furthermore, interventions should be focused on a combination of different ecological levels and various strategies. Future interventions should be developed participatively and should be focused on a combination of both individual and environmental levels. Higher education institutions are encouraged to use opportunities such as creating win-win situations within the institution, working together with research groups and engaging students through student associations. The findings of this research add to the literature on implementation science and inform future development and implementation of nutrition interventions in higher education settings., Competing Interests: Competing interests: The authors declare no competing interests. Ethical approval: The present study was approved by the Ethics Committee of Ghent University Hospital, Gent, Belgium (Ref. nr. ONZ-2023-0077). Consent to participate: All participants signed an informed consent prior to participation. Consent for publication: All participants signed an informed consent prior to participation. The manuscript does not contain any individual person’s data in any form (including any individual details, images or videos)., (© 2024. The Author(s).)

Aims: A significant number of children and adolescents are insufficiently physically active and have a sedentary lifestyle, which is associated with adverse health outcomes, necessitating effective interventions. Using a participatory approach, which engages youth in intervention development, may enhance intervention effectiveness, as such interventions are believed to be more tailored to the needs of the target group. This scoping review aimed to provide an overview of the results of process and effect evaluations of studies that developed school-based physical activity and/or sedentary behaviour interventions using a participatory approach among children and adolescents., Methods: Six databases (MEDLINE, Embase, Web of Science, CENTRAL (Cochrane Central Register of Controlled Trials), Scopus and SPORTDiscus) were searched. Studies were included when they evaluated the participatory process, intervention implementation or health-related intervention effects. A quality assessment was completed using two QualSyst checklists. Extracted data included characteristics of studies, interventions, and participatory processes; characteristics of participants from whom data were collected; outcomes measured and measurement methods used; and key findings., Results: Twenty-five papers, covering 18 original studies, were included. Studies suggested that participatory processes were generally perceived positively, resulting in pupils feeling empowered, experiencing ownership and gaining certain skills. Participatory developed interventions also seemed to be generally well received, although the intervention dose delivered and intervention reach seemed to vary between studies. Finally, studies generally tended to report no effects on health., Conclusions: Although a participatory approach could be promising in empowering pupils and promoting intervention acceptance, apparent differences in intervention implementation and limited effectiveness highlight the need to enhance participatory processes and intervention effectiveness., Competing Interests: Declaration of conflicting interestsThe authors declared no potential conflicts of interest with respect to the research, authorship and/or publication of this article.

Background: Mutual learning and shared decision-making are key elements of Participatory Action Research (PAR), highlighting the important role of the facilitator to support this. This study aims to illustrate how a facilitator can contribute to successful PAR sessions based on the reflection of three PAR projects., Methods: Participatory sessions took place with adolescents for 3-4 school years. After each session (n = 252 sessions across three projects), facilitators filled in a reflection form that assessed the group process and their facilitating role. Facilitators independently coded a selection of 135 reflection forms partly deductive and partly inductive based on core PAR principles derived from a pragmatic literature search., Results: A well-prepared session - for example, including active and creative participatory methods and a clearly stated goal - contributed to efficiency and the necessary flexibility. Making agreements, making sure everyone is heard and taking 'fun-time' appeared important for creating and maintaining a safe, functional and positive atmosphere. Finally, facilitators needed to encourage co-researchers to take the lead and adapt to the group dynamics, to ensure ownership and shared decision-making., Conclusion: In-depth qualitative analyses of a standardized reflection form used in three different PAR projects resulted in various lessons to support facilitators in collaborating with co-researchers in PAR projects., (© 2024. The Author(s).)

Background: Co-creation is seen as a way to ensure all relevant needs and perspectives are included and to increase its potential for beneficial effects and uptake process evaluation is crucial. However, existing process evaluation frameworks have been built on practices characterised by top-down developed and implemented interventions and may be limited in capturing essential elements of co-creation. This study aims to provide a review of studies planning and/or conducting a process evaluation of public health interventions adopting a co-creation approach and aims to derive assessed process evaluation components, used frameworks and insights into formative and/or participatory evaluation., Methods: We searched for studies on Scopus and the Health CASCADE Co-Creation Database. Co-authors performed a concept-mapping exercise to create a set of overarching dimensions for clustering the identified process evaluation components., Results: 54 studies were included. Conceptualisation of process evaluation included in studies concerned intervention implementation, outcome evaluation, mechanisms of impact, context and the co-creation process. 22 studies (40%) referenced ten existing process evaluation or evaluation frameworks and most referenced were the frameworks developed by Moore et al (14%), Saunders et al (5%), Steckler and Linnan (5%) and Nielsen and Randall (5%).38 process evaluation components were identified, with a focus on participation (48%), context (40%), the experience of co-creators (29%), impact (29%), satisfaction (25%) and fidelity (24%).13 studies (24%) conducted formative evaluation, 37 (68%) conducted summative evaluation and 2 studies (3%) conducted participatory evaluation., Conclusion: The broad spectrum of process evaluation components addressed in co-creation studies, covering both the evaluation of the co-creation process and the intervention implementation, highlights the need for a process evaluation tailored to co-creation studies. This work provides an overview of process evaluation components, clustered in dimensions and reflections which researchers and practitioners can use to plan a process evaluation of a co-creation process and intervention., Competing Interests: Competing interests: None declared., (© Author(s) (or their employer(s)) 2024. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.)

Aims: Adolescents living in vulnerable socioeconomic conditions are confronted with tobacco-related health disparities. As school-based interventions appear to be less effective among these youngsters, other approaches are necessary. One promising avenue is youth social work settings that offer sport and recreational activities (SR-settings). SR-settings have been examined as a levering context for health promotion, but evidence regarding smoking prevention is currently lacking., Methods: This study describes the protocol of a non-randomised cluster controlled trial evaluating a smoking prevention intervention for adolescents. At least 24 SR-settings are needed for the intervention and control group. A mixed-method design will be used. Quantitative measures will be used to assess effectiveness, involving validated questionnaires on smoking initiation behaviour and influencing factors (i.e. attitude, self-efficacy, social influence and risk perception). In addition, feasibility will be assessed with regard to intervention fidelity, dose and reach. Data will be collected at baseline, three and nine months following the intervention. To gain deeper understanding on the impact and underlying processes of the intervention, we will conduct qualitative interviews with users (adolescents) and implementers (youth workers within the SR-settings) of the intervention., Conclusions: Conducting this trial will offer novel insights into the effectiveness of a smoking prevention intervention designed for adolescents living in vulnerable socioeconomic conditions. A mixed-method design will enable to measure impact, implementation and underlying processes of the intervention. Overall, this design will enhance our understanding on the suitability of SR-settings as contexts for smoking prevention initiatives targeting hard-to-reach youth. This trial is registered on Clinicaltrials.gov: NCT05920772., Competing Interests: Declaration of conflicting interestsThe authors have no conflicts of interest to declare.

Background: While there is increasing evidence for negative physical health consequences of high volumes of sedentary time and prolonged sedentary time in adolescents, the association with cognition is less clear. This study investigated the association of volumes of habitual sedentary time and prolonged sedentary time with executive functions and short-term memory in adolescents., Methods: This study has a cross-sectional observational study design. Volumes of sedentary time and prolonged sedentary time (accumulated sedentary time spent in bouts of  ≥ 30 min) were measured using the Axivity AX3 accelerometer. Six cognitive functions (spatial and verbal short-term memory; and working memory, visuospatial working memory, response inhibition and planning as executive functions) were measured using six validated cognitive assessments. Data were analysed using generalised linear models., Results: Data of 119 adolescents were analysed (49% boys, 13.4 ± 0.6 year). No evidence for an association of volumes of sedentary time and prolonged sedentary time with spatial and verbal short-term memory, working memory, and visuospatial working memory was found. Volumes of sedentary time and prolonged sedentary time were significantly related to planning. One hour more sedentary time or prolonged sedentary time per day was associated with respectively on average 17.7% (95% C.I.: 3.5-29.7%) and 12.1% (95% C.I.: 3.9-19.6%) lower scores on the planning task., Conclusions: No evidence was found for an association of volumes of habitual sedentary time and prolonged sedentary time with short-term memory and executive functions, except for planning. Furthermore, the context of sedentary activities could be an important confounder in the association of sedentary time and prolonged sedentary time with cognition among adolescents. Future research should therefore collect data on the context of sedentary activities., Trial Registration: This study was registered at ClinicalTrials.gov in January 2020 (NCT04327414; released on March 11, 2020)., (© 2024. The Author(s).)

To date, it remains unknown which psychosocial determinants identified by several leading behavior change theories are associated with different sleep parameters among adolescents. Therefore, this study investigates whether changes in knowledge about healthy sleep, attitude toward healthy sleep and going to bed on time, self-efficacy to engage in healthy sleep behavior, perceived parental and peer norms, perceived barriers (e.g., worrying, fear of missing out), and perceived support (e.g., bedtime rules, encouragement) related to healthy sleep are associated with changes in adolescents' sleep duration on school days and free days and sleep quality over a period of 1 year. Two-wave data of 1648 Flemish adolescents (mean age = 15.01, SD = 0.65, 46.3% female) were analyzed using linear models. Increased levels of parental social support, positive attitude towards and perceived advantages of healthy sleep, norm-knowledge, and perceived peer behavior were associated with sleep duration, with parental social support having the strongest association. Increased levels of perceived barriers were associated with decreased levels of sleep quality parameters, and increased levels of self-efficacy, positive attitude, and parental modeling were associated with improved sleep quality parameters, with perceived barriers having the strongest association. The current results indicate that behavior change theories are useful in the context of adolescent sleep behavior and suggest that perceived parental support (i.e., bedtime rules) and perceived barriers are most strongly associated with adolescents' sleep duration and/or quality., (© 2023. The Author(s).)

Background: Adolescents' sleep deteriorated over the last decades, urging the need to develop effective interventions. Using participatory action research (PAR) is a promising and unique approach to target adolescents' sleep. This study aims to describe the process and results of combining PAR and intervention mapping (IM) to guide future researchers on developing and planning of the implementation and evaluation of interventions promoting healthy sleep in adolescents., Methods: In each of three intervention schools (two with general and technical education and one with technical and vocational education), an action team including adolescents (age 13- 15 years, n=max. 12) and a researcher was composed to develop and plan the intervention. During weekly sessions (n=ranging from 23 to 34 per school), the action team went through the six steps of IM. A short PAR was performed with parents (n=7) to develop parental intervention components., Results: Combining PAR and IM resulted in interventions focusing on the importance of healthy sleep, regular sleep patterns and associated behaviors: screen behaviors, physical activity, dietary behavior and relaxation. Several differences in the participatory process (i.e. more guidance needed during brainstorms in the vocational/technical school) and developed intervention (i.e. less intrusive intervention components in the vocational/technical school) were observed between schools., Conclusion: Combining PAR with IM resulted in more extensive interventions than other existing school-based sleep interventions. Future studies should investigate whether a participatory developed sleep intervention could be transferred to another setting using a shorter participatory process., Competing Interests: The authors declare that they have no conflict of interests., (© 2023 The Author(s).)

Background: Previous research on the association between sports participation and body composition has shown mixed findings. The family home is considered one of the most influential environments on childhood obesity. Thus, the association between sports participation and body composition in children may be influenced by an obesogenic home environment., Objectives: To investigate if an obesogenic family environment moderates the association between sports participation and body composition in children., Methods: A total of 3999 children (54% girls; 11.6 ± 0.7 years) and their parent(s) were included from the ENERGY project. A composite obesogenic family environment risk score was created from 10 questionnaire items. Height, weight (to calculate body mass index), and waist circumference were obtained by trained researchers and used as indicators of body composition., Results: The composite risk score significantly moderated the association between sports participation and both waist circumference and body mass index. In children from families with moderate and high obesogenic risk, organized sports participation was significantly associated with smaller waist circumference (moderate risk: -0.29, 95% CI -0.45 to -0.14; high risk: -0.46, 95% CI -0.66 to -0.25) and lower body mass index (moderate risk: -0.10, 95% CI -0.16 to -0.04; high risk: -0.14, 95% CI -0.22 to -0.06), but not in children with a low obesogenic family risk score., Conclusions: Enrolling children in sports activities from an early age can be important for healthy weight maintenance, especially among children from obesogenic family environments., (© 2023 World Obesity Federation.)

Tobacco smoking uptake is still a major public health concern, especially among youngsters living in vulnerable situations. Finding optimal ways to engage youngsters in smoking prevention is important. Compared to traditional settings such as schools, social work settings providing sports-based and recreational activities (SR-settings) tend to reach and engage youngsters more. This study aimed to gain insight into the reasons for smoking uptake among youngsters living in vulnerable situations and the conditions through which SR-settings are potentially beneficial for smoking prevention initiatives. Data were collected in two SR-settings in Flanders, Belgium, by means of five focus group discussions and six individual interviews with youngsters (n = 38, mean age = 12.9 ± 2.61 years, 69.7% boys) and eight individual interviews with youth workers (n = 8, mean age = 27.5 ± 7.95 years, 87.5% men). A thematic analysis (TA) approach was applied to analyse the data. Besides individual factors, such as attitudes towards smoking, the desire to be part of a group and conformity to group norms seem to be important drivers of smoking uptake among youngsters in vulnerable situations. The presence of powerful role models in SR-settings with whom youngsters identify may counteract group norms by encouraging healthy behaviour. SR-settings seem suitable for questioning perceptions of vulnerable youngsters, unlike other settings where they may struggle to be heard. The conditional characteristics of SR-settings, such as authentic group processes, having meaningful roles, and being heard, make these contexts promising venues for smoking prevention efforts among vulnerable youngsters. Youth workers who have established trusting relationships with youngsters seem well-suited to communicate smoking prevention messages. A participatory approach, in which youngsters are involved in developing smoking prevention programs, is desirable., (© The Author(s) 2023. Published by Oxford University Press. All rights reserved. For permissions, please email: journals.permissions@oup.com.)