Stephanie J Morris, Jon L Oliver, John M Radnor, Mark Hill, G Gregory Haff, Rhodri S Lloyd
{"title":"The Influence of Relative Age and Biological Maturity on Youth Weightlifting Performance.","authors":"Stephanie J Morris, Jon L Oliver, John M Radnor, Mark Hill, G Gregory Haff, Rhodri S Lloyd","doi":"10.1123/pes.2024-0083","DOIUrl":"https://doi.org/10.1123/pes.2024-0083","url":null,"abstract":"<p><strong>Purpose: </strong>Relative age effects and biological maturation are common biases within youth talent identification and development programs; however, their respective influence on youth weightlifting is unknown.</p><p><strong>Method: </strong>Skeletal age, determined from ultrasonography, and competitive total loads (kg) were collected in 49 national age group weightlifters (boys: n = 24, age = 13.8 [2.4] y; girls: n = 25, age = 13.2 [2.4] y). The discrepancy score between skeletal age and chronological age was used to determine maturity timing, and participants' birth dates were classified into birth quartiles to examine relative age effects.</p><p><strong>Results: </strong>Chi-square analysis (χ2) showed that birth quartile distributions across the age groups were not significantly different from national norms; however, maturity biases were evident, with significantly more \"early maturers\" and significantly fewer \"on time maturers\" than expected (P < .05). Regression analyses indicated that a large amount of variance in weightlifting performance (ie, absolute combined total) could be explained by skeletal age in both boys (R2 = .73) and girls (R2 = .75).</p><p><strong>Conclusion: </strong>Biological maturation influences selection into weightlifting talent pathways to a greater extent than relative age. Maturation also has a strong influence on weightlifting performance and should be considered to facilitate both the identification and development of weightlifting talent.</p>","PeriodicalId":49712,"journal":{"name":"Pediatric Exercise Science","volume":" ","pages":"1-9"},"PeriodicalIF":1.4,"publicationDate":"2025-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143069052","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Eliete Samara Batista Dos Santos, Iluska Almeida Carneiro Martins de Medeiros, Mayara Sanay da Silva Oliveira, Felipe Vogt Cureau, Arnaldo Luis Mortatti, Ricardo Santos Oliveira
{"title":"The Association Between Physical Activity and Markers of Obesity in Children Living With Obesity.","authors":"Eliete Samara Batista Dos Santos, Iluska Almeida Carneiro Martins de Medeiros, Mayara Sanay da Silva Oliveira, Felipe Vogt Cureau, Arnaldo Luis Mortatti, Ricardo Santos Oliveira","doi":"10.1123/pes.2024-0079","DOIUrl":"10.1123/pes.2024-0079","url":null,"abstract":"<p><strong>Purpose: </strong>The purpose of this study is to describe the association between the volume and intensity of accelerometer-assessed physical activity (PA) and markers of obesity.</p><p><strong>Method: </strong>Forty-seven children (20 girls) took part in this investigation. Children wore accelerometers on their nondominant wrists for 7 days. PA was expressed as average acceleration (AvAcc, proxy of PA volume), intensity gradient (IG, distribution of intensity across the 24-h profile), and the acceleration of the most active 5 to 120 minutes of the day (MX, where X = 5-120). Markers of obesity used were body mass index (BMI), BMI z score, obesity severity as the BMI percentage of the 95th percentile, waist-to-hip ratio, and body fat percentage.</p><p><strong>Results: </strong>AvAcc and IG of the sample were 37.3 (11.2) and -2.19 (0.16), respectively. The standardized coefficients indicated that increases in 1 standard deviation of IG (0.2 for the present sample) were associated with a decrease of BMI (-2.3; 95% CI, -4.13 to -0.39 kg/m2), obesity severity as the BMI percentage of the 95th percentile (-9.9; 95% CI, -18.78 to -0.91), body fat percentage (-3.6; 95% CI, -6.68 to -0.57%), and waist-to-hip ratio (-0.02; 95% CI, -0.04 to -0.00) independent of AvAcc. No associations were found for AvAcc and obesity markers when controlling for IG.</p><p><strong>Conclusion: </strong>Children with obesity perform little PA. The distribution of PA intensity may be important for improving BMI, obesity severity as the BMI percentage of the 95th percentile, body fat percentage, and waist-to-hip ratio.</p>","PeriodicalId":49712,"journal":{"name":"Pediatric Exercise Science","volume":" ","pages":"1-8"},"PeriodicalIF":1.4,"publicationDate":"2025-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143069051","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Effects of Real-Life Motor Complexity on Walking and Mobility in Trained and Sedentary Adolescents With Intellectual Disabilities: A Motor Dual-Task Investigation.","authors":"Ghada Jouira, Rym Baccouch, Mariem Jardak, Dan Iulian Alexe, Haithem Rebai, Sonia Sahli","doi":"10.1123/pes.2024-0086","DOIUrl":"10.1123/pes.2024-0086","url":null,"abstract":"<p><p>Adolescents with intellectual disabilities (ID) often encounter challenges in walking and mobility due to cognitive and motor impairments. This study aimed to investigate the impact of real-life motor complexity on walking and mobility in this population, particularly focusing on dual-task scenarios. Twenty-four adolescents with ID, divided into trained and sedentary groups, participated in the study. Participants completed the Timed Up and Go Test and the 10-m walk test under various conditions, including holding a water glass, carrying a tray with 2 glasses of water, introducing background noise, and encountering unexpected obstacles. Both groups significantly exhibited increased completion times (P < .001) in the Timed Up and Go Test and 10-m walk test with each added level of difficulty. The trained group demonstrated significantly superior performance (P < .05), only in the single task and holding a water glass. However, the difference between groups diminished as the challenges increased. In conclusion, real-life motor dual-tasking scenarios significantly impact walking and mobility in adolescents with ID. Physical activity may improve mobility and walking, particularly under less challenging conditions. Incorporating real-life challenges into motor dual-task training programs can enhance adaptability and reduce the risk of falls and injuries, ultimately improving the quality of life for individuals with ID.</p>","PeriodicalId":49712,"journal":{"name":"Pediatric Exercise Science","volume":" ","pages":"1-8"},"PeriodicalIF":1.4,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142957853","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ludwig Ruf, Stefan Altmann, Christian Kloss, Sascha Härtel
{"title":"Response to \"A Note on \"Response to: Methodological Rigor in Reference Chart Development: A Comment on 'Normative Reference Centiles for Sprint Performance in High-Level Youth Soccer Players: The Need To Consider Biological Maturity'\"\".","authors":"Ludwig Ruf, Stefan Altmann, Christian Kloss, Sascha Härtel","doi":"10.1123/pes.2024-0162","DOIUrl":"10.1123/pes.2024-0162","url":null,"abstract":"","PeriodicalId":49712,"journal":{"name":"Pediatric Exercise Science","volume":" ","pages":"1-2"},"PeriodicalIF":1.4,"publicationDate":"2024-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142910974","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Roxy H O'Rourke, Kelly P Arbour-Nicitopoulos, Christine Voss, Kathleen A Martin Ginis, Denver M Y Brown
{"title":"Differential Associations Between Device-Assessed and Parent-Reported Physical Activity With Indicators of Mental Health in Children and Youth With Disabilities.","authors":"Roxy H O'Rourke, Kelly P Arbour-Nicitopoulos, Christine Voss, Kathleen A Martin Ginis, Denver M Y Brown","doi":"10.1123/pes.2023-0178","DOIUrl":"https://doi.org/10.1123/pes.2023-0178","url":null,"abstract":"<p><strong>Purpose: </strong>We examined associations between device-assessed and parent-reported physical activity with mental health indicators among children and youth with disabilities.</p><p><strong>Method: </strong>Physical activity and mental health data were collected from a larger national surveillance study of physical activity in children and youth with disabilities in Canada. A total of 122 children and youth with disabilities (mean age = 10 y; 80% boys, 57% with developmental disability) wore a Fitbit for 28 days to measure their daily steps. Parents reported the frequency and duration of their child's leisure-time physical activity during the previous 7 days. Parents also completed the Strengths and Difficulties Questionnaire (ie, total difficulties score, internalizing problems, externalizing problems, and prosocial behavior) as a measure of mental health symptoms.</p><p><strong>Results: </strong>Significant relationships were observed between parent-reported physical activity and total difficulties as well as internalizing problems but not externalizing problems. Nonsignificant relationships were observed between median daily step counts and mental health indicators.</p><p><strong>Conclusion: </strong>Differential relationships between physical activity and mental health indicators may exist among children and youth with disabilities depending on how physical activity is operationalized (ie, steps vs active minutes) and measured (ie, proxy report vs device assessed). Interventionists seeking to improve mental health outcomes among children and youth with disabilities through physical activity promotion should consider these findings when deciding upon methods to assess physical activity behaviors.</p>","PeriodicalId":49712,"journal":{"name":"Pediatric Exercise Science","volume":" ","pages":"1-8"},"PeriodicalIF":1.4,"publicationDate":"2024-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142899658","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Muscle Tone and Stiffness Comparison in Ambulatory Children With Unilateral Spastic Cerebral Palsy: Implications for Postural Balance and Functional Mobility.","authors":"Melisa Akdıkan, İlke Kara, Tülay Çevik Saldıran","doi":"10.1123/pes.2024-0074","DOIUrl":"10.1123/pes.2024-0074","url":null,"abstract":"<p><strong>Objectives: </strong>To compare muscle tone and stiffness in ambulatory children with unilateral spastic cerebral palsy (UCP) with typically developing peers and explore their relationship with postural balance and functional mobility.</p><p><strong>Methods: </strong>Forty ambulatory children with UCP and age-matched typically developing peers were assessed for tone and stiffness of lumbar spinal extensors, gastrocnemius, and hamstring muscles using a myotonometer. Functional mobility was evaluated with the 2-Minute Walk Test, and the Timed Up and Go Test, while postural balance was evaluated using the Pediatric Balance Scale and the Trunk Control Measurement Scale (TCMS).</p><p><strong>Results: </strong>The gastrocnemius muscle tone and stiffness were higher on the affected side in UCP compared with the less affected side and typically developing peers (P < .05). Lumbar spinal extensor tone correlated with improved Trunk Control Measurement Scale scores (P = .003). The gastrocnemius and hamstring muscles' tone and stiffness did not significantly affect functional mobility measures in UCP (P > .05).</p><p><strong>Conclusions: </strong>Our study highlights the importance of achieving muscle symmetry, particularly in the plantar flexors, for functional mobility in UCP children. While differences in ankle and knee muscle biomechanics were observed, they didn't significantly impact functional mobility or postural balance. Symmetry in lumbar spinal extensor biomechanics correlated with better outcomes, emphasizing the crucial role of trunk control in rehabilitation strategies for ambulatory children with UCP.</p>","PeriodicalId":49712,"journal":{"name":"Pediatric Exercise Science","volume":" ","pages":"1-11"},"PeriodicalIF":1.4,"publicationDate":"2024-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142899663","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
He-Sin Cheng, Hung-Ta Chiu, Yi-Ju Tsai, Yi-Liang Kuo
{"title":"Effects of Functional Movement Training on Batting Kinematics in Adolescent Baseball Players.","authors":"He-Sin Cheng, Hung-Ta Chiu, Yi-Ju Tsai, Yi-Liang Kuo","doi":"10.1123/pes.2023-0184","DOIUrl":"https://doi.org/10.1123/pes.2023-0184","url":null,"abstract":"<p><strong>Purpose: </strong>This study aimed to investigate the effects of 8-week functional movement training on batting kinematics and Functional Movement Screen (FMS) score in young baseball athletes with a composite FMS score of ≤14.</p><p><strong>Methods: </strong>A randomized controlled trial was conducted with 26 male junior high school baseball players (chronological age 13.52 y [0.66]; predicted age at peak height velocity 13.68 y [0.42]), randomly assigned to an experimental (performing functional movement training), or, a control group (performing routine training). Batting kinematics were assessed using a 3-dimensional motion analysis system, and FMS score was evaluated using the FMS test. Both outcomes were measured before and after training.</p><p><strong>Results: </strong>The experimental group significantly improved batting time and velocity and FMS score after training when compared with the control group. However, there were no significant changes in the other kinematic parameters between the experimental and control groups.</p><p><strong>Conclusion: </strong>Eight-week functional movement training demonstrated positive effects on batting performance and movement quality in adolescent baseball players with poor movement quality and core control. Further research is warranted to investigate the biomechanical mechanisms underlying these improvements.</p>","PeriodicalId":49712,"journal":{"name":"Pediatric Exercise Science","volume":" ","pages":"1-8"},"PeriodicalIF":1.4,"publicationDate":"2024-11-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142741164","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Jürgen Birklbauer, Burkhard Gniewosz, Thomas Freudenthaler, Anita Birklbauer, Birgit Pötzelsberger, Hans-Peter Wiesinger, Daniel Weghuber, Susanne Ring-Dimitriou
{"title":"A Fundamental Movement Skill Test for Preschool Children With and Without Overweight: The SALTO Test Battery.","authors":"Jürgen Birklbauer, Burkhard Gniewosz, Thomas Freudenthaler, Anita Birklbauer, Birgit Pötzelsberger, Hans-Peter Wiesinger, Daniel Weghuber, Susanne Ring-Dimitriou","doi":"10.1123/pes.2024-0076","DOIUrl":"https://doi.org/10.1123/pes.2024-0076","url":null,"abstract":"<p><strong>Purpose: </strong>This study aimed to evaluate a 3-factor model of fundamental movement skills in preschool children, incorporating both process- and product-oriented assessment methods, and to test the model's invariance across subgroups of age, body weight and sex.</p><p><strong>Methods: </strong>The SALTO test battery was administered to 736 preschool children aged 3-6 years. A single-indicator multitrait-multimethod model was specified with Locomotion, Object Manipulation, and Balance as latent factors and a latent method factor to address the multimethod design. Measurement invariance was tested across subgroups using multigroup confirmatory factor analysis.</p><p><strong>Results: </strong>The 3-factor model yielded good fit indices, confirming the construct validity of the SALzburg Together against Obesity test battery. Strong measurement invariance was found across body mass index groups, whereas partial invariance was observed across age and sex groups. Older children outperformed younger ones in all skill domains, children with overweight had lower skills in Balance and Locomotion, and sex differences were found in Object Manipulation and Balance.</p><p><strong>Conclusion: </strong>The SALTO test battery is a structurally valid tool for evaluating and comparing fundamental movement skills in preschool children across age, weight status, and sex. The findings underscore the importance of considering these factors when designing interventions to enhance fundamental movement skills in early childhood.</p>","PeriodicalId":49712,"journal":{"name":"Pediatric Exercise Science","volume":" ","pages":"1-14"},"PeriodicalIF":1.4,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142693746","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A Note on \"Response to: Methodological Rigor in Reference Chart Development: A Comment on 'Normative Reference Centiles for Sprint Performance in High-Level Youth Soccer Players: The Need To Consider Biological Maturity'\".","authors":"Lorenzo Lolli","doi":"10.1123/pes.2024-0099","DOIUrl":"https://doi.org/10.1123/pes.2024-0099","url":null,"abstract":"","PeriodicalId":49712,"journal":{"name":"Pediatric Exercise Science","volume":" ","pages":"1-2"},"PeriodicalIF":1.4,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142631549","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Henrique Flore Cavenago, Emerson José Venancio, Gabriela de Oliveira, Tamara Beres Lederer Goldberg, Solange de Paula Ramos, Carla Cristiane Silva
{"title":"Does Physical Exercise Improve Resting Autonomic Cardiac Modulation in Overweight and Obese Children and Adolescents? A Systematic Review and Meta-Analysis.","authors":"Henrique Flore Cavenago, Emerson José Venancio, Gabriela de Oliveira, Tamara Beres Lederer Goldberg, Solange de Paula Ramos, Carla Cristiane Silva","doi":"10.1123/pes.2023-0195","DOIUrl":"https://doi.org/10.1123/pes.2023-0195","url":null,"abstract":"<p><strong>Purpose: </strong>The objective of this study was to analyze the impact of interventions with physical exercise on cardiac autonomic modulation of overweight and/or obese children and adolescents.</p><p><strong>Method: </strong>The present systematic review was registered in PROSPERO. Searches were performed in the MEDLINE, CENTRAL, SciELO, Scopus, CINAHL, SportDiscus, LILACS, EMBASE, and Web of Science databases. The methodological quality was assessed using the Cochrane Risk of Bias tool. A meta-analysis was performed using the standardized mean difference. The quality of evidence was rated by the Grading of Recommendations, Assessment, Development, and Evaluation system.</p><p><strong>Results: </strong>From 1866 records identified, 15 randomized clinical trials were included in the systematic review; however, only 4 randomized clinical trials were pooled in the meta-analysis (69 participants in the experimental group and 71 in the control group). The meta-analysis showed a positive effect on the experimental group for the high-frequency power (%; standardized mean difference = 2.22; 95% CI, 1.46-2.98; P < .01), and low-frequency power (%) was reduced after the intervention (standardized mean difference = -1.66; 95% CI, -2.19 to -1.12; P < .01).</p><p><strong>Conclusion: </strong>This study showed that interventions had a positive effect on frequency domain variables of cardiac autonomic modulation in overweight and/or obese children and adolescents. However, more studies with lower heterogeneity and higher quality evidence are needed.</p>","PeriodicalId":49712,"journal":{"name":"Pediatric Exercise Science","volume":" ","pages":"1-12"},"PeriodicalIF":1.4,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142607153","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}