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Not yet recruiting NCT07511738

Testing the Youth Physical Activity Promotion Model (YPAP) in Brazilian Adolescents

— Observational YPAP Model

For patients and families

In plain language

An automatic summary of structured registry data. It is an orientation aid, not a substitute for the official protocol or a physician assessment.

What is being studied
This is an observational study: the protocol does not assign a study treatment.
Who it may be relevant to
Registry conditions: YPAP Model. Basic parameters: 10 years — 13 years · All.
What needs checking
Age, condition and sex are only basic indicators. Prior treatment, laboratory values and other mandatory requirements appear in the eligibility criteria below.
Where it takes place
Brazil
Next step
Save the trial, show it to the treating physician, and confirm current recruitment with the study center. Costs, documents and travel →

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Official title

Testing the Conceptual Diagram of the Youth Physical Activity Promotion Model (YPAP) Using Cross-sectional Data From Brazilian Adolescents

Overview

This cross-sectional observational study aims to test the original conceptual diagram of the Youth Physical Activity Promotion Model (YPAP) in Brazilian adolescents. The study evaluates the relationships among predisposing, enabling, and reinforcing correlates described in the YPAP framework and investigates how these correlates interact with one another according to the pathways proposed by the model. A convenience sample of adolescents aged 10 to 13 years will be recruited through broad public dissemination as part of a larger experimental intervention project. Data will be collected at a single time point. Instead of traditional linear analytical strategies, the study will adopt complex, flexible, and non-linear methods such as network analysis to examine how correlates interconnect and influence physical activity behavior. Secondary analyses will explore whether the structure and strength of associations differ across demographic subgroups such as sex and socioeconomic level.

Detailed description

The Youth Physical Activity Promotion Model (YPAP) conceptualizes physical activity behavior in youth as influenced by interacting correlates organized within predisposing, enabling, and reinforcing domains. These domains interact dynamically and collectively shape physical activity, forming a structured diagram originally proposed by Welk and colleagues. This study aims to test this conceptual diagram using data from Brazilian adolescents aged 10-13 years. The objective is to evaluate whether the empirical relationships among correlates follow the directional pathways and interactions proposed by the original YPAP model. This study will analyze baseline data collected as part of a broader experimental intervention, although no intervention or exposure occurs for the purpose of this cross-sectional analysis. Recruitment will occur through broad public dissemination linked to the host project and community outreach strategies. Given the complexity of the model and the expected multilevel interdependencies among correlates, the analysis strategy will rely on flexible, non-linear methods-most prominently network analysis-to explore how variables cluster, how correlates influence one another, and how these structures relate to normative patterns expected from the original YPAP framework. Secondary aims include testing whether observed associations vary by key demographic moderators described in the model (sex, socioeconomic level).

Primary outcome measures

  • Accelerometer-Measured Physical Activity (MVPA) [Time frame: Baseline (single assessment)]
  • Total Body Mass [Time frame: Baseline (single assessment)]
  • Standing and Sitting Height [Time frame: Baseline (single assessment)]
  • Body Mass Index (BMI) [Time frame: Baseline (single assessment)]
  • Waist Circumference [Time frame: Baseline (single assessment)]
  • Waist-to-Height Ratio (WHtR) [Time frame: Baseline (single assessment)]
  • Body Fat Percentage [Time frame: Baseline (single assessment)]
  • Cardiorespiratory Fitness (Yo-Yo IR1C) [Time frame: Baseline (single assessment)]
  • Motor Competence (KTK) [Time frame: Baseline (single assessment)]
  • Cognitive Function (Tower of Hanoi) [Time frame: Baseline (single assessment)]
Secondary outcome measures (2)
  • Stratified network structure by sex [Time frame: Baseline]
  • Stratified network structure by socioeconomic level [Time frame: Baseline]

Eligibility criteria

Inclusion criteria

  • age 10-13 years;
  • medical clearance for physical activity.

Exclusion criteria

  • presence of any clinical diagnosis that may interfere the performance of assessments (including musculoskeletal, neurological, vascular, pulmonary, or cardiac disorders).

Criteria are shown verbatim from the registry (in English). Final eligibility is always assessed by the study center.

Healthy volunteers: Yes

Study design

Observational model
Other

Study locations

Brazil · 1 center
  • State University Of Rio de Janeiro — Rio de Janeiro

Publications

  • Jiang C, Razak NA, Rasyid NM, Cheng H. Investigating the youth physical activity promotion model among Chinese middle school students. BMC Public Health. 2025 May 19;25(1):1843. doi: 10.1186/s12889-025-23046-y. PMID 40389903
  • Belanger M, Giroux MA, Registe PPW, Gallant F, Jemaa S, Faivre P, Saucier D, Mekari S. Adolescent physical activity profiles as determinants of emerging adults' physical activity. Int J Behav Nutr Phys Act. 2025 Mar 25;22(1):35. doi: 10.1186/s12966-025-01732-9. PMID 40134004
  • Evenson KR, Catellier DJ, Gill K, Ondrak KS, McMurray RG. Calibration of two objective measures of physical activity for children. J Sports Sci. 2008 Dec;26(14):1557-65. doi: 10.1080/02640410802334196. PMID 18949660
  • Vasconcellos F, Seabra A, Cunha F, Montenegro R, Penha J, Bouskela E, Nogueira Neto JF, Collett-Solberg P, Farinatti P. Health markers in obese adolescents improved by a 12-week recreational soccer program: a randomised controlled trial. J Sports Sci. 2016;34(6):564-75. doi: 10.1080/02640414.2015.1064150. Epub 2015 Jul 24. PMID 26208409
  • Zhao C, Yuan J, Huang WW. Multilevel determinants of physical activity in children and adolescents: a meta-analysis guided by social ecological model. BMC Sports Sci Med Rehabil. 2025 Jul 15;17(1):202. doi: 10.1186/s13102-025-01225-z. PMID 40665401

Identifiers

NCT: NCT07511738 · YPAP Bra Adolescents

Primary sources (government registries)

View this study on ClinicalTrials.gov ↗