Physical Activity In Children Research Articles

Associations among motor competence, health-related fitness, and physical activity in children: A comparison of gold standard and field-based measures

ABSTRACT This study compared the associations among motor competence, health-related fitness, and physical activity measured by gold standard and field-based methods in children. A total of 248 first-grade children (153 boys) aged 6–7 years participated in the study. Motor competence was assessed using the Test of Gross Motor Development, Second Edition (TGMD −2). Gold standard measures were percent body fat using dual-energy X-ray absorptiometry, peak oxygen uptake per weight using a gas analyser, and moderate-to-vigorous physical activity using accelerometers. Field-based measures were body mass index, maximum speed during progressive running on a treadmill, and a physical activity questionnaire. Multiple regression analysis adjusted for age and sex was used to examine the associations of motor competence with one of the health-related variables and compared differences by measurement method. The results indicated that field-based measures models showed lower associations (R2 = 0.02–0.17) than the gold standard (R2 = 0.21–0.27) and lower standardised regression coefficients for sex and motor competence, except for maximum speed. In conclusion, gold standard measures resulted in stronger associations between motor competence, and health-related fitness and physical activity in children. Examining the contribution of motor competence in children’s health using field-based tests can underestimate it.

229 Evaluation of the Global Matrix of Para Report Cards on Physical Activity of Children and Adolescents with Disabilities

Abstract Purpose Physical activity provides a wide range of health benefits for children and adolescents with disabilities (CAWD). However, despite CAWD being at higher risk of physical inactivity, there is a lack of surveillance systems that capture physical activity data of CAWD. To address this gap, the Global Matrix of Para Report Cards on physical activity of CAWD was set up with 14 participating countries/jurisdictions (Ng et al., 2023) based on the methodology of the Active Healthy Kids Global Alliance’s Global Matrix 4.0 (Aubert et al., 2023). This study aims to evaluate the process, outcome, and impact of the Global Matrix of Para Report Cards. Methods The evaluation was informed by the Global Matrix 3.0 evaluation process (Aubert et al., 2020). Process, outcome, and impact indicators were informed by online surveys, reports/publications, and website analytics of the special issue published in Adapted Physical Activity Quarterly. Results Two online surveys have been completed by 64-71% of targeted respondents. Moderate-to-high satisfaction rates were reported for the development of and participation in the Global Matrix initiative and open-ended comments reported issues (e.g., data availability, inconsistency in definitions) and positive feedback (e.g., networking/collaboration, visibility). The participating Report Card teams assigned and contributed a total of 139 physical activity grades—overall physical activity, organised sport, active play, active transport, physical fitness, sedentary behaviour, family and peers, schools, community and environment, government—to the Global Matrix of which 45% were incomplete. Twelve Report Card teams published a short Para Report Card article for their country. As of February 2024, >47,000 views have been recorded for the special issue comprising the Global Matrix and country Para Report Card articles. Conclusions This evaluation highlights the need for more discussion on the definitions of disability and benchmarks of physical activity indicators to improve the grading process and more support in accessing and synthesising data related to CAWD. These are important steps to support inclusion and representation of CAWD in (inter)national surveillance of physical activity and health.

The Role of Diet and Physical Activity in Obesity and Overweight in Children with Down Syndrome in Developed Countries.

Down's syndrome (DS), or Trisomy 21, represents the most common chromosomal abnormality in live births, characterized by an extra chromosome 21. Children affected by Down's syndrome are more susceptible to the development of obesity and of becoming overweight compared with other children. Furthermore, they seem to present a more unfavorable lipid profile than the non-DS obese pediatric population. Diet and physical activity are closely related to the development of overweight and obesity, and they can be assessed using questionnaires such as the Mediterranean Diet Quality Index in children and adolescents (KIDMED) and the Godin-Shephard Leisure-Time Physical Activity Questionnaire. This review aims to undertake a comprehensive analysis of the intricate interplay between diet and physical activity in children affected by Down's syndrome. Specifically, it seeks to deepen understanding regarding the question of how diet and exercise can influence and prevent the development of overweight and obesity in that special pediatric population.

Strengths and weaknesses in Scottish policies for childhood physical activity and nutrition: insights from the 2021 active healthy kids report card.

Strengths and weaknesses in Scottish policies for childhood physical activity and nutrition: insights from the 2021 active healthy kids report card.

PARENTAL ATTITUDES AND SUPPORT TOWARD SCHOOL SPORTS

This cross-sectional study examined parents’ attitudes, their support, and perceptions of school involvement in school sports using a newly developed Parental Attitudes and Support for School Sports and Perceptions of School Involvement Questionnaire (PASSIQ). The study also examined the association between parents' gender and children's sports participation concerning these attitudes and support levels. A total of 380 parents were included in the study, with 341 valid responses analyzed. Our findings indicate that higher levels of parental support are strongly associated with more positive attitudes toward school sports (p < 0.001). While perceptions of school support showed a marginally significant positive relationship (p = 0.083), extended participation in sports was generally associated with lower parental attitudes, potentially reflecting concerns about burnout or shifting perceptions over time. Notably, the interaction between parents' gender and children's sports participation revealed that for male parents, extended sports participation of their children significantly enhanced positive attitudes toward school sports (p = 0.004). These results highlight the importance of considering parental support and gender-specific responses when developing strategies to promote positive attitudes and support for school sports. The PASSIQ proved to be a reliable and valid tool for assessing these constructs, providing a foundation for future research and interventions to foster supportive environments for children's physical activity.

Assessing the implementation of healthy eating and physical activity policies and practices in Early Childhood Education and Care in New South Wales, Australia: A cross-sectional study.

Australian children are not meeting the recommended physical activity (PA) and healthy eating (HE) guidelines. Health behaviour practices implemented in community settings such as early education services can improve child's health outcomes and are therefore key to help meet guidelines. This study aimed to measure the implementation of HE and PA policies and practices in Early Childhood Education and Care (ECEC) services in New South Wales (NSW), Australia, and to examine their association with service characteristics. A random sample of 1122 centre-based ECEC services were invited to a cross-sectional survey measuring HE and PA policy and practice implementation. Regression analyses were conducted to assess the relationship between the service characteristics and implementation of policies/practices. In total, 565 ECEC services completed the survey. Results show that while some practices are implemented, the implementation of practices promoting HE and PA education is low. Practices related to educator training for HE (18%) and PA (13%) were poorly implemented. The implementation of practices such as 'providing educator training around child PA', 'engaging families in activities to increase child PA' and 'encouraging supportive feeding practices' were significantly higher in services located in major cities than regional/remote services. 'Having a PA policy' and the practice of 'limiting the use of screen time' was significantly higher in long day care services than in preschools. The implementation of 'providing educator-led PA', 'providing free play opportunities' and 'having a PA policy' was significantly lower in private not-for-profit community managed services than in private for-profit services. Implementation of various HE and PA policies and practices in regional/remote services, private not-for-profit services and preschools across NSW could be improved. SO WHAT?: Future research should be prioritised towards identifying factors influencing the implementation of these policies and practices to best tailor implementation support efforts for those who need it the most.

A cross-sectional study assessing modifications to the delivery of a multi-component implementation strategy (the Get Outside, Get Active program) to improve child physical activity in early childhood education and care services.

The Get Outside, Get Active (GOGA) program is a randomised controlled trial which tested the impact of a multi-component implementation strategy to support early childhood education and care (ECEC) services to replace indoor-only free play with indoor-outdoor-free play. This cross-sectional study aims to describe the extent and nature of modifications made to implementation strategies and Behaviour Change Techniques (BCTs) using the Framework for Reporting Adaptations and Modifications to Evidence-based Implementation Strategies (FRAME-IS) and to describe the fidelity of BCT delivery throughout GOGA. An audit of records was undertaken throughout the intervention delivery period in the intervention arm. GOGA included 14 standard BCTs within six implementation strategies. Modifications and BCT delivery were recorded by Health Promotion Officers via project records. Modifications were categorised according to the FRAME-IS. BCT delivery was recorded using a checklist. Forty-four ECEC services received the GOGA program. Overall, 60 modifications were recorded. According to FRAME-IS categories, most modifications related to: content; format; pragmatic or practical considerations; tailoring/tweaking/refining in nature; fidelity was inconsistent; the goal was to increase the acceptability, appropriateness, or feasibility of the implementation effort; the rationale was at the practitioner level; and were unplanned/reactive. Overall, 96.4% of standard BCTs were delivered as intended. GOGA was delivered with high fidelity to protocol as indicated by the level of BCT delivery. This article details a thorough approach to documenting modifications and provides guidance for future studies. SO WHAT?: This article contributes to the emerging evidence regarding documentation of adaptations and modifications to public health implementation interventions.

Improving physical activity and screen time in Australian Outside School Hours Care: Study protocol.

Children's physical activity and screen time behaviours impact their physical health and well-being. In Australia, less than half of children meet daily physical activity recommendations and only one-third meet daily screen time recommendations. Nearly half a million Australian school children aged 5-12 attend Outside School Hours Care (OSHC) weekly, activities undertaken at OSHC play a key role in meeting these recommendations. Currently, physical activity and screen time practices in OSHC vary and lack policy guidance. The Activated OSHC program is a policy-based intervention that supports OSHC services to implement the physical activity and screen time guidelines. 192 OSHC services across Australia will be recruited. 96 services will be randomly allocated to receive the Activated OSHC program. OSHC coordinators will complete online surveys examining physical activity and screen time scheduling, cost, acceptability, and feasibility. Primary outcome; changes in the proportion of intervention and control services meeting OSHC sector physical activity and screen time guidelines, and secondary outcomes; changes in children's physical activity and screen time behaviours; changes in staff behaviour will be assessed using mixed-effects regression models. The aim of this study is to examine the impact of the Activated OSHC program on children's physical activity and screen time. Recent Australian research in Outside School Hours Care (OSHC) has identified significant inconsistency in practices related to physical activity and screen time, compounded by an absence of explicit policy guidance. The Activated OSHC program is a policy-based intervention that supports OSHC services to implement the Australian OSHC physical activity and screen time guidelines. This study will assess the implementation and effectiveness of the Activated OSHC program in an effectiveness-implementation hybrid type 2 trial design. Implementation of outside school hours care sector physical activity and screen time guidelines may improve children's physical activity and screen time behaviours.

Sex differences in physical activity of US children at age 13 months: child and Mother Physical Activity Study (CAMPAS)

BackgroundLower physical activity (PA) has been observed in females compared to males among preschool-aged and older children. However, the timing of when the sex gap emerges is unclear. The purpose of this study was to investigate whether females have lower PA levels than males in the early toddler age and to explore whether gross motor competency and PA parenting practices might explain a sex difference in PA.MethodsThe study design was cross-sectional. Participants were a community-based sample of 137 children aged 10–16 months residing in US Midwest urban/suburban area. Participants’ mothers completed a survey that contained a demographic questionnaire, the Ages and Stages Questionnaire gross motor competency subscale, and a PA parenting practices questionnaire. Participating children wore an ActiGraph accelerometer on their hip for 7 days. Accelerometer-measured time spent in moderate- and vigorous intensity PA (MVPA; minutes/day) and in total PA (minutes/day) were calculated. Multivariable linear regression analysis was conducted to predict MVPA and total PA by sex, gross motor competency, PA parenting practices, and socioeconomic status.ResultsAmong 137 participants (54.0% female), average age was 13.6 months (SD = 1.7). MVPA was 72 ± 25 and 79 ± 26 min/day for females and males, respectively (p = 0.14). Total PA was 221 ± 48 and 238 ± 47 min/day for females and males, respectively (p = 0.04). Both gross motor competency and PA-encouraging parenting practices were positively associated MVPA (p = 0.01 and p = 0.02, respectively) and total PA (p = 0.02 and p = 0.01, respectively); however, these relationships did not differ by sex (p = 0.11 and p = 0.89, respectively). After accounting for gross motor competency and PA parenting practices, total PA was 15 min/day lower among females than males (p = 0.04).ConclusionsThis cross-sectional study of US children observed a sex gap in total PA at 10–16 months of age. Gross motor development and PA parenting practices did not differ by child sex nor explain the sex difference in PA. A longitudinal investigation should follow to further narrow down when sex differences in PA emerge and to determine the factors that lead to this difference.

Nutrition and physical activity practices in family day care: A cross-sectional survey of Australian family day care educators.

Munch & Move is a New South Wales (NSW) Ministry of Health program offering family day care (FDC) educators training to support children's healthy behaviours. This study examined educators' nutrition, physical activity and screen time practices and relationships between Munch & Move training and professional development (PD) on these practices. NSW FDC educators (n = 186) completed an online survey from July 2020-June 2021. Differences between groups based on Munch & Move training (trained; not trained) and PD (those who completed PD ≥1 time per year; those who completed PD <1 time per year or never) were tested using bivariate analyses. A significantly higher proportion of educators trained in Munch & Move offered information to families regarding food serving sizes, nutrition policies, and children's physical activity and screen time. Over one-third in both groups did not meet the guideline of no screen time for children under 2 years old. Compared with those who completed PD ≥1 time per year, a significantly higher proportion of educators who completed PD <1 time per year or never did not provide families with nutrition guidelines or resources. Educators trained in Munch & Move, and those who completed PD more frequently, demonstrated better nutrition, physical activity and screen time practices in several areas. SO WHAT?: This study demonstrated benefits of the Munch & Move program, implemented with support from Local Health District health promotion officers, and highlighted key areas for improvement in healthy practices in FDC.

Associations of family socioeconomic indicators and physical activity of primary school-aged children: a systematic review

BackgroundFamily socioeconomic indicators (education, occupation, and household income) are key determinants influencing children’s physical activity (PA). This study aims to systematically review the current research about the association between family socioeconomic indicators and PA among primary school-aged children and to quantify the distribution of reported associations by childs’ and parents’ sex and according to analysis and assessment methods.MethodsA systematic literature research in multiple scientific databases (MEDLINE via PubMed, Web of Science, ScienceDirect, SPORTDiscus and ERIC) was performed for literature published between 1st January 2010 and 31st March 2022. Only studies reporting statistical associations between an SES indicator of at least one parent (education, occupation, income, or an SES index) and different types and intensities of PA in primary school-aged children (6 to 12 years) were included in the analysis. The distributions of the reported associations were evaluated across and differentiated by sub-group analysis of assessment methods (objectively measured vs. self-reported PA) and analysis methods (univariate vs. multivariate models).ResultsOverall, 93 studies reported in 77 publications were included in this review. Most of the studies were conducted in Europe and used self-reports (questionnaires) to assess PA. Most studies used only a single SES indicator (commonly maternal education), and only two studies calculated an SES index. The majority of the studies focused on moderate-to-vigorous physical activity (MVPA), total physical activity (TPA), and organized physical activity (OPA). Results showed predominantly positive associations between SES indicators and OPA. In contrast, results regarding different intensities of daily PA (TPA, LPA, MPA, MVPA, VPA, LTPA) were heterogeneous, with overwhelmingly no associations.ConclusionOverall, the results expand the knowledge about the association between family socioeconomic indicators and children’s PA and disprove the hypothesis of a clear positive association. However, large multicenter studies are lacking using a real SES index as a predictor and analyzing gender-specific multivariate models.

Relationship between Pain, Physical Activity, Screen Time and Age among Young Children during the COVID-19 Pandemic.

During the COVID-19 pandemic, many countries implemented restrictions, social distancing measures, and lockdowns to limit the spread of the disease. These lockdowns have affected children's screen time (ST), pain, and physical activity (PA) levels. The present study aimed to explore the relationships between ST, pain, age, and PA before, during, and after the COVID-19 pandemic. The caregivers of 329 children (median age = 8 years) filled out an online self-reported survey about the children's PA, ST, and pain before, during, and after the COVID-19 curfew. Spearman's rank correlation coefficient was used to explore the associations between these variables. After the curfew, pain that existed before the pandemic had a weak negative relationship with PA intensity (-0.11, p = 0.04) and a weak positive relationship with ST (r = +0.12, p = 0.04). There was a strong positive relationship between ST in all time periods (p > 0.01). PA and ST had a weak negative relationship (p > 0.05) during the curfew and after the curfew but not before the COVID-19 pandemic. Age had a weak positive correlation with ST in all time periods (p > 0.01). In addition, ST was affected by the curfew. The study findings indicated that young children had longer ST during the curfew and after the curfew compared with before the curfew. Increasing PA could lessen children's ST, which could, in turn, increase the probability that their general pain would decrease.

Physical activity in children with asthma: Associations with environmental, demographic, anthropometric and clinical parameters

Physical activity in children with asthma: Associations with environmental, demographic, anthropometric and clinical parameters

Parental perceptions of neighborhood safety and preschool children's outdoor play: An exploration of sex and safety type differences

Despite the growing evidence on the influence of neighborhood safety on physical activity, few studies have specifically focused on preschool-aged children and differentiated the various domains of neighborhood safety. This study investigates the relationship between parental perceptions of neighborhood safety and preschool children's time spent outdoors and explores potential sex differences in this relationship. This study analyzed nationally representative data from 1656 Korean children (848 boys and 808 girls) aged 3, 5, 6 years collected over the course of three waves of the Panel Study on Korean Children (PSKC). Outdoor playtime was measured by maternal reports of the time their children spent playing outdoors on a typical weekday. Parental perceptions of neighborhood safety were assessed using two items that inquired about neighborhood safety in terms of crime and accidents, respectively. Fixed effects estimates revealed that parental perceptions of social safety were associated with an increase in children's outdoor physical activity (b = 3.778, p < 0.05), whereas perceptions of physical safety were not. Sex-stratified models showed that the association between parental perceptions of social safety and children's outdoor play was driven largely by boys (b = 8.498, p < 0.001), with no association observed for girls. The findings of this study underscore the importance of addressing the social safety of neighborhood environments to promote outdoor play in preschool children. Moreover, sex differences should be considered when developing interventions aimed at increasing physical activity among young children.

Strengths and weaknesses in Scottish policies for childhood physical activity and nutrition: insights from the 2021 active healthy kids report card.

Strengths and weaknesses in Scottish policies for childhood physical activity and nutrition: insights from the 2021 active healthy kids report card.

"Losing access to outdoor spaces was the biggest challenge for children to be healthy": pandemic restrictions and community supports for children's movement in Nova Scotia.

Health-focused communities can promote physical activity for children by providing them with safe and supportive environments to move. Across the COVID-19 pandemic many community spaces and services were closed due to public health restrictions. During the pandemic, Atlantic Canada uniquely implemented an agreement between four provinces to restrict travel and reduce the spread of the virus. The "Atlantic bubble" led to fewer cases of COVID-19 and restrictions to community spaces and services. With restrictions now removed, community spaces and services likely play a critical role in facilitating the recalibration of children's movement. Perspectives from families who experienced the "Atlantic bubble" may offer valuable insights to the use of these spaces during and after the removal of restrictions. This study explored the role of community spaces and services on their child's physical activity across the COVID-19 pandemic from the perspectives of Nova Scotia caregivers. We employed a qualitative description approach and conducted semi-structured interviews with 14 caregivers of children aged 5-11 years who lived in Nova Scotia, Canada. Interviews were transcribed verbatim and analyzed using reflexive thematic analysis. Four themes were generated: (1) Public health restrictions limited community movement behaviors and social connections, (2) Spaces, locations, and environments influenced how families experienced physical activity during public health restrictions, (3) Virtual realities: screens supported a new sense of community for children throughout the pandemic, and (4) "Facilitated" and "forced adaptability": public health restrictions changed family dynamics, routines, and movement behaviors. Despite living in the "Atlantic bubble," Nova Scotian caregivers shared that COVID-19 related public health restrictions shifted their family's dynamics, routines, and ability to engage in physical activity within their communities. Community spaces and services can be leveraged to recalibrate children's movement as pandemic-related restrictions are reduced. In future public health crises, community spaces and services should remain in place to whatever extent possible to reduce the collateral consequences of public health restrictions on children's health.

Effect of wearable activity trackers on physical activity in children and adolescents: a systematic review and meta-analysis

Physical inactivity in children and adolescents has become a pressing public health concern. Wearable activity trackers can allow self-monitoring of physical activity behaviour and promote autonomous motivation for exercise. However, the effects of wearable trackers on physical activity in young populations remain uncertain. In this systematic review and meta-analysis, we searched PubMed, Embase, SPORTDiscus, and Web of Science for publications from database inception up to Aug 30, 2023, without restrictions on language. Studies were eligible if they were randomised controlled trials or clustered randomised controlled trials that examined the use of wearable activity trackers to promote physical activity, reduce sedentary behaviours, or promote overall health in participants with a mean age of 19 years or younger, with no restrictions on health condition or study settings. Studies were excluded if children or adolescents were not the primary intervention cohort, or wearable activity trackers were not worn on users' bodies to objectively track users' physical activity levels. Two independent reviewers (WWA and FR) assessed eligibility of studies and contacted authors of studies if more information was needed to assess eligibility. We also searched reference lists from relevant systematic reviews and meta-analyses. Systematic review software Covidence was used for study screening and data extraction. Study characteristics including study setting, participant characteristics, intervention characteristics, comparator, and outcome measurements were extracted from eligible studies. The two primary outcomes were objectively measured daily steps and moderate-to-vigorous physical activity. We used a random-effects model with Hartung-Knapp adjustments to calculate standardised mean differences. Between-study heterogeneity was examined using Higgins I2 and Cochran Q statistic. Publication bias was assessed using Egger's regression test. This systematic review was registered with PROSPERO, CRD42023397248. We identified 9619 studies from our database research and 174 studies from searching relevant systematic reviews and meta-analyses, of which 105 were subjected to full text screening. We included 21 eligible studies, involving 3676 children and adolescents (1618 [44%] were female and 2058 [56%] were male, mean age was 13·7 years [SD 2·7]) in our systematic review and meta-analysis. Ten studies were included in the estimation of the effect of wearable activity trackers on objectively measured daily steps and 11 were included for objectively measured moderate-to-vigorous physical activity. Compared with controls, we found a significant increase in objectively measured daily steps (standardised mean difference 0·37 [95% CI 0·09 to 0·65; p=0·013]; Q 47·60 [p<0·0001]; I2 72·7% [95% CI 53·4 to 84·0]), but not for moderate-to-vigorous physical activity (-0·08 [-0·18 to 0·02; p=0·11]; Q 10·26 [p=0·74]; I2 0·0% [0·0 to 53·6]). Wearable activity trackers might increase daily steps in young cohorts of various health statuses, but not moderate-to-vigorous physical activity, highlighting the potential of wearable trackers for motivating physical activity in children and adolescents. More rigorously designed trials that minimise missing data are warranted to validate our positive findings on steps and to explore possible long-term effects. The Hong Kong University Grants Committee and Seed Fund for Basic Research of the University of Hong Kong.

Longitudinal relationship between organised and non-organised physical activities and overall physical activity in children aged 3-11years.

Young children's physical activity (PA) has been decreasing while their sports participation has been increasing. Therefore, the aim of this research was to longitudinally examine whether and, if so, how organised and non-organised PA participation by early childhood education and care (ECEC)-aged children (T1; 3-8years) predicted their accelerometer-measured PA at primary school age (T2; 7-11years). Secondarily, changes in organised and non-organised PA participation over time were investigated. The cluster-randomised study participants comprised 501 Finnish children (52.3% girls: T1, Mage=5.57±1.06; T2, Mage=8.80±1.07). PA participation was queried via guardian questionnaire at T1 and T2. Organised PA participation was operationalised as non-participation, participation in one sport or multisport (two or more) participation; non-organised PA was operationalised as time spent outdoors on weekdays and on weekend days. PA at T2 was measured using accelerometers. The primary outcome was tested using linear regressions, while a paired sample t-test and Mann-Whitney U test assessed differences between T1 and T2. The results showed outdoor time and organised sports participation increased from T1 to T2. Moreover, outdoor time at T1 predicted more moderate-to-vigorous PA (MVPA) and less sedentary time at T2, while multisport participation predicted significantly more MVPA and less sedentary time at T2. Overall, being outdoors and multisport participation at younger ages appear to have predicted Finnish children's later (MV) PA and sedentary behaviour.

Results from Chile's 2022 report card on physical activity for children and adolescents

PurposeTo summarize the results of Chile's 2022 Report Card (RC) on physical activity (PA) for Children and Adolescents. MethodsChile's 2022 RC included ten core PA indicators common to the Global Matrix 4.0. Evidence from scientific articles, reports, and databases published between 2018 and January 2022 was included for each indicator. The data were collected and analyzed by a national scientific committee, which assigned letter grades (A to F) using a consensus based on benchmarks defined and revised by the Active Healthy Kids Global Alliance. ResultsThe committee assigned the following grades: Overall PA, D−; Organized Sports and Physical Activity Participation, C−; Active Play, Incomplete; Active Transportation, D; Sedentary Behavior, D−; Physical Fitness, Incomplete; Family and Peers, D; School, C; Community and Environment, D+; Government, A−. ConclusionsChile's 2022 RC, like its previous versions, shows persistently low grades for most indicators. Overall PA remained nearly unchanged, while Community and Environment scored lower. Slight improvements were seen in Organized Sports, Family and Peers, and School Environment. While Chile has endeavored to increase children's activity levels, policies require implementation through a systemic, coherent framework to promote sustainable changes and reach a larger portion of children and youth.

MEDIATING ROLE OF PRENATAL ANDROGENS, MUSCLE STRENGTH AND PHYSICAL ACTIVITY ON AGGRESSION IN OBESE AND OVERWEIGHT CHILDREN AND ADOLESCENTS

Obesity in children and adolescents is a global health problem associated with behavioral issues like aggression which can lead to developmental problems. High levels of prenatal androgens may play a role between obesity and aggression. This study examined the relationship between obesity, aggression and the mediating role of prenatal androgens, muscle strength and physical activity in children and adolescents. 118 healthy boys ages 9 to 17 participated and researchers measured their height, weight, body composition, muscle strength, second to fourth finger ratio, physical activity level using PAQ, and aggression using BPAQ. Chi-square test, Pearson's correlation, stepwise linear regression, and Sobel's test were used to examine relationships between variables and test mediation, seeking to identify factors affecting aggressiveness. The study found that aggression is directly related to weight, BMI, muscle mass, body fat and WHR. Obese people were more likely to be aggressive compared to non-obese people. Regression analysis showed that 2D:4D ratio, muscle mass and BMI can predict aggression. The results also showed that only muscle strength mediates the relationship between body mass and aggression. The study found a direct link between aggression and body mass in boys which may be because muscle strength mediates this relationship. The findings agree with the idea that prenatal androgens affect aggression in boys. Obese children with low 2D:4D ratios may need education to change views, values, and increase physical activity.