Pediatric Exercise Science最新文献_第10页

Association of Recess Provision With Elementary School-Aged Children's Physical Activity, Adiposity, and Cardiorespiratory and Muscular Fitness. 课间休息与小学学龄儿童身体活动、肥胖、心肺和肌肉健康的关系。

IF 1.8 4区医学

Pediatric Exercise Science Pub Date : 2023-05-01 DOI: 10.1123/pes.2021-0190

Kimberly A Clevenger, Melitta A McNarry, Kelly A Mackintosh, David Berrigan

{"title":"Association of Recess Provision With Elementary School-Aged Children's Physical Activity, Adiposity, and Cardiorespiratory and Muscular Fitness.","authors":"Kimberly A Clevenger, Melitta A McNarry, Kelly A Mackintosh, David Berrigan","doi":"10.1123/pes.2021-0190","DOIUrl":"https://doi.org/10.1123/pes.2021-0190","url":null,"abstract":"Purpose: To identify associations between amount of school recess provision and children's physical activity (PA), weight status, adiposity, cardiorespiratory endurance, muscular strength, and muscular endurance.Method: Data from 6- to 11-year-old participants (n = 499) in the 2012 National Youth Fitness Survey were analyzed. Parents/guardians reported children's PA levels and recess provision, categorized as no/minimal (9.0%), low (26.1%), medium (46.0%), or high (18.9%). Children wore a wrist-worn accelerometer for 7 days and completed anthropometric measurements. Fitness was assessed using grip strength and treadmill, pull-up, and plank tests. Cross-sectional linear and logistic regression compared outcomes across levels of recess provision adjusting for the survey's complex sampling design.Results: Children with high provision of recess were 2.31 times more likely to meet PA guidelines according to parent report than those with no/minimal recess. Accelerometer-measured PA followed a more U-shaped pattern, wherein PA was higher in children with high, compared to low, recess provision but comparable to those with no/minimal recess provision. There were no associations with weight status, adiposity, or fitness.Conclusion: Current recess recommendations (20 min·d-1) may be insufficient as 30 minutes per day of recess was associated with a 2-fold greater likelihood of achieving recommended PA levels. Additional research on recess quantity and quality is needed.","PeriodicalId":49712,"journal":{"name":"Pediatric Exercise Science","volume":"35 2","pages":"99-106"},"PeriodicalIF":1.8,"publicationDate":"2023-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9401495","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}

引用次数: 4

Metabolic Flexibility During Exercise in Children with Overweight/Obesity Versus Children who are Lean. 超重/肥胖儿童与瘦儿童在运动中的代谢灵活性。

IF 1.8 4区医学

Pediatric Exercise Science Pub Date : 2023-05-01 DOI: 10.1123/pes.2021-0229

Brandon Dykstra, Dillon Kuszmaul, Anthony D Mahon

{"title":"Metabolic Flexibility During Exercise in Children with Overweight/Obesity Versus Children who are Lean.","authors":"Brandon Dykstra, Dillon Kuszmaul, Anthony D Mahon","doi":"10.1123/pes.2021-0229","DOIUrl":"https://doi.org/10.1123/pes.2021-0229","url":null,"abstract":"Purpose: This study examined metabolic flexibility with respect to fat metabolism during exercise in children who are lean (n=11; 10.9[0.9] y) and overweight/obese (OW/OB; n=9; 10.3[1.2] y).Method: Participants were grouped based on body mass index percentiles for age and sex. Groups were mixed in age and sex. Participants completed two 20-minute exercise bouts on a cycle ergometer, separated by a 10-minute rest. Bout 1 consisted of 10 minutes at 50% VO2peak and 10 minutes at 75% VO2peak. Bout 2 was 20 minutes at 50% VO2peak. Absolute fat oxidation rate (FOR), FOR relative to body mass, FOR relative to fat-free mass, and proportional fat use were measured at 10 minutes of bout 1 and 5, 10, 15, and 20 minutes of bout 2.Results: Absolute FOR was higher in the OW/OB group (range: 117.8 [55.1]-206.2 [48.3] mg·min-1) than in the lean group (81.1 [32.2]-152.2 [38.2] mg·min-1); however, there were no significant main effects for group or significant interactions for proportional fat use, FOR relative to body mass, or FOR relative to fat-free mass.Conclusion: Children in this age range who are overweight/obese do not display impaired metabolic flexibility with respect to fat metabolism during exercise.","PeriodicalId":49712,"journal":{"name":"Pediatric Exercise Science","volume":"35 2","pages":"92-98"},"PeriodicalIF":1.8,"publicationDate":"2023-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9458274","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}

引用次数: 0

Mobile Electroencephalography Reveals Differences in Cortical Processing During Exercises With Lower and Higher Cognitive Demands in Preadolescent Children. 移动脑电图揭示了早期抑郁儿童在低认知需求和高认知需求的运动中皮层处理的差异。

IF 1.4 4区医学

Pediatric Exercise Science Pub Date : 2023-03-21 Print Date: 2023-11-01 DOI: 10.1123/pes.2021-0212

Linda Becker, Daniel Büchel, Tim Lehmann, Miriam Kehne, Jochen Baumeister

{"title":"Mobile Electroencephalography Reveals Differences in Cortical Processing During Exercises With Lower and Higher Cognitive Demands in Preadolescent Children.","authors":"Linda Becker, Daniel Büchel, Tim Lehmann, Miriam Kehne, Jochen Baumeister","doi":"10.1123/pes.2021-0212","DOIUrl":"10.1123/pes.2021-0212","url":null,"abstract":"Purpose: The aim of this study was to examine whether cortical activity changes during exercise with increasing cognitive demands in preadolescent children.Method: Twenty healthy children (8.75 [0.91] y) performed one movement game, which was conducted with lower and higher cognitive demands. During a baseline measurement and both exercise conditions, cortical activity was recorded using a 64-channel electroencephalographic system, and heart rate was assessed. Ratings of perceived excertion and perceived cognitive engagement were examined after each condition. To analyze power spectral density in the theta, alpha-1, and alpha-2 frequency bands, an adaptive mixture independent component analysis was used to determine the spatiotemporal sources of cortical activity, and brain components were clustered to identify spatial clusters.Results: One-way repeated-measures analyses of variance revealed significant main effects for condition on theta in the prefrontal cluster, on alpha-1 in the prefrontal, central, bilateral motor, bilateral parieto-occipital, and occipital clusters, and on alpha-2 in the left motor, central, and left parieto-occipital clusters. Compared with the lower cognitive demand exercise, cortical activity was significantly higher in theta power in the prefrontal cluster and in alpha-1 power in the occipital cluster during the higher cognitive demand exercise.Conclusion: The present study shows that exercise complexity seems to influence cortical processing as it increased with increasing cognitive demands.","PeriodicalId":49712,"journal":{"name":"Pediatric Exercise Science","volume":" ","pages":"214-224"},"PeriodicalIF":1.4,"publicationDate":"2023-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9164097","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}

引用次数: 0

Physical Activity Levels and Adiposity in Ambulant Children and Adolescents With Cerebral Palsy Compared With Their Typically Developing Peers. 与典型发育中的同龄人相比，脑瘫患儿和青少年的体力活动水平和脂肪含量。

IF 1.4 4区医学

Pediatric Exercise Science Pub Date : 2023-03-21 Print Date: 2023-11-01 DOI: 10.1123/pes.2022-0064

Leticia Janzen, Clodagh M Toomey, Laura K Brunton, Elizabeth G Condliffe, Shane Esau, Adam Kirton, Carolyn A Emery, Gregor Kuntze

{"title":"Physical Activity Levels and Adiposity in Ambulant Children and Adolescents With Cerebral Palsy Compared With Their Typically Developing Peers.","authors":"Leticia Janzen, Clodagh M Toomey, Laura K Brunton, Elizabeth G Condliffe, Shane Esau, Adam Kirton, Carolyn A Emery, Gregor Kuntze","doi":"10.1123/pes.2022-0064","DOIUrl":"10.1123/pes.2022-0064","url":null,"abstract":"Purpose: This study assessed physical activity (PA) and body composition of ambulatory children and adolescents with cerebral palsy (CP) and their typically developing peers.Methods: Participants included youth with CP (ages 8-18 y and Gross Motor Function Classification System [GMFCS] levels I-III) and their typically developing peers. Outcomes included PA (actigraphy) and fat/lean mass index (FMI/LMI; dual-energy X-ray absorptiometry). Statistical analyses included linear mixed effects models with Bonferroni adjustment. Fixed effects were study group (CP and typically developing); random effects were participant clusters (sex and age). Exploratory analyses included association of body composition and PA, GMFCS level, and CP involvement (unilateral and bilateral).Results: Seventy-eight participants (CP: n = 40, girls: n = 29; GMFCS I: n = 20; GMFCS II: n = 14; GMFCS III: n = 6) met inclusion criteria. Individuals with CP had lower moderate to vigorous PA (MVPA; β = -12.5; 98.3% confidence interval, -22.6 to -2.5 min; P = .004) and lower LMI (β = -1.1; 97.5% confidence interval, -2.1 to -0.0 kg/m2; P = .020). Exploratory analyses indicated increased LMI with greater MVPA (P = .001), reduced MVPA for GMFCS II (P = .005) and III (P = .001), increased sedentary time for GMFCS III (P = .006), and greater fat mass index with unilateral motor impairment (P = .026).Conclusions: The findings contribute to the knowledge base of increasing MVPA and LMI deficits with the greater functional impact of CP. Associations of increasing LMI with greater MVPA support efforts targeting enhanced PA participation to promote independent mobility.","PeriodicalId":49712,"journal":{"name":"Pediatric Exercise Science","volume":" ","pages":"225-231"},"PeriodicalIF":1.4,"publicationDate":"2023-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9164098","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}

引用次数: 0

Change of Direction Speed in Youth Male Soccer Players: The Predictive Value of Anthropometrics and Biological Maturity. 青少年男子足球运动员方向速度变化:人体测量学和生物学成熟度的预测价值。

IF 1.8 4区医学

Pediatric Exercise Science Pub Date : 2023-02-01 DOI: 10.1123/pes.2021-0178

Yassine Negra, Senda Sammoud, Alan M Nevill, Helmi Chaabene

{"title":"Change of Direction Speed in Youth Male Soccer Players: The Predictive Value of Anthropometrics and Biological Maturity.","authors":"Yassine Negra, Senda Sammoud, Alan M Nevill, Helmi Chaabene","doi":"10.1123/pes.2021-0178","DOIUrl":"https://doi.org/10.1123/pes.2021-0178","url":null,"abstract":"This study aimed to develop the optimal allometric body size/shape and a biological maturity model that predicted the change of direction (CoD) mean speed performance in youth male soccer players. One-hundred and fifteen youth soccer players (age: 12.4 [1.3] y) participated in this study. The 505 test was used to assess CoD mean speed performance. Anthropometric measurements comprised body height (cm), sitting height (cm), body mass (kg), fat mass (kg), lower limb length (cm), thigh length (cm), leg length (cm), foot length (cm), thigh girth (cm), and calf girth (cm). The maturity status was determined based on the maturity offset method. To identify size/shape and maturity characteristics associated with CoD speed performance, we computed a multiplicative allometric log-linear regression model, which was refined using backward elimination. The multiplicative allometric model exploring the association between 505 CoD mean speed performance and the different anthropometric characteristics in youth soccer players estimated that fat mass (P < .001), sitting height (P = .02), and maturity offset (P = .004) are the key predictors. More specifically, youths who are more mature and have a lower fat mass and a shorter trunk length, are likely to achieve a better CoD mean speed performance. These findings highlight the relevance of considering anthropometric and maturity characteristics in youth soccer players to support talent identification.","PeriodicalId":49712,"journal":{"name":"Pediatric Exercise Science","volume":"35 1","pages":"1-7"},"PeriodicalIF":1.8,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10775538","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}

引用次数: 4

Clusters of Activity-Related Social and Physical Home Environmental Factors and Their Association With Children's Home-Based Physical Activity and Sitting. 与活动相关的社会和物理家庭环境因素簇及其与儿童家庭体力活动和坐的关系。

IF 1.8 4区医学

Pediatric Exercise Science Pub Date : 2023-02-01 DOI: 10.1123/pes.2021-0174

Michael P Sheldrick, Clover Maitland, Kelly A Mackintosh, Michael Rosenberg, Lucy J Griffiths, Richard Fry, Gareth Stratton

{"title":"Clusters of Activity-Related Social and Physical Home Environmental Factors and Their Association With Children's Home-Based Physical Activity and Sitting.","authors":"Michael P Sheldrick, Clover Maitland, Kelly A Mackintosh, Michael Rosenberg, Lucy J Griffiths, Richard Fry, Gareth Stratton","doi":"10.1123/pes.2021-0174","DOIUrl":"https://doi.org/10.1123/pes.2021-0174","url":null,"abstract":"Purpose: Understanding which physical activity (PA) and sedentary behavior correlates cluster in children is important, particularly in the home, where children spend significant time. Therefore, this study aimed to assess clustering of physical and social activity-related factors at home, and whether these clusters are related to home-based sitting and PA in children. A secondary aim was to explore whether the clusters were associated with child, parent, and family characteristics.Methods: Altogether, 235 children (55% girls, mean age = 10.2 [0.7] y) and their parents took part. Physical (eg, PA and electronic media equipment, house and garden size, layout) and social (eg, activity preferences, priorities, parental rules) home environmental factors were obtained via the HomeSPACE-II audit and self-report, respectively. Principal component analysis was used to identify clusters of physical and social environmental factors. Backward regression analysis and partial correlations were used to examine relationships between clusters, children's device-measured home-based activity behaviors, and background characteristics.Results: The findings show that physical and social environment activity-related factors at home cluster. The clusters were associated with several background characteristics, with socioeconomic factors appearing to be particularly influential. The clusters were also associated with home-based activity behaviors in the hypothesized directions.Conclusion: Interventions which target clusters of social and physical factors at home, especially among low-socioeconomic status families, are warranted.","PeriodicalId":49712,"journal":{"name":"Pediatric Exercise Science","volume":"35 1","pages":"23-34"},"PeriodicalIF":1.8,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10776069","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}

引用次数: 1

Bone Turnover Markers and Osteokines in Adolescent Female Athletes of High- and Low-Impact Sports Compared With Nonathletic Controls. 高、低冲击运动的青春期女运动员与非运动对照组的骨转换标志物和骨因子比较。

IF 1.8 4区医学

Pediatric Exercise Science Pub Date : 2023-02-01 DOI: 10.1123/pes.2022-0025

Steven Kottaras, Joshua Stoikos, Brandon J McKinlay, Izabella A Ludwa, Andrea R Josse, Bareket Falk, Panagiota Klentrou

{"title":"Bone Turnover Markers and Osteokines in Adolescent Female Athletes of High- and Low-Impact Sports Compared With Nonathletic Controls.","authors":"Steven Kottaras, Joshua Stoikos, Brandon J McKinlay, Izabella A Ludwa, Andrea R Josse, Bareket Falk, Panagiota Klentrou","doi":"10.1123/pes.2022-0025","DOIUrl":"https://doi.org/10.1123/pes.2022-0025","url":null,"abstract":"This study examined differences in resting concentrations of markers of bone formation and resorption, and osteokines between female adolescent (12-16 y) swimmers, soccer players, and nonathletic controls. Resting, morning blood samples were obtained after an overnight fast from 20 swimmers, 20 soccer players, and 20 nonathletic controls, matched for age. carboxyl-terminal cross-linking telopeptide of type I collagen (CTX), amino-terminal propeptide of type I collagen (P1NP), total osteocalcin (OC), sclerostin, osteoprotegerin (OPG), and receptor activator of nuclear factor kappa B ligand (RANKL) were analyzed in serum. After controlling for percent body fat, there were no significant differences between swimmers and nonathletic controls in any of the measured markers. In contrast, soccer players had significantly higher P1NP (89.5 [25.6] ng·mL-1), OC (57.6 [22.9] ng·mL-1), and OPG (1052.5 [612.6] pg·mL-1) compared with both swimmers (P1NP: 66.5 [20.9] ng·mL-1; OC: 24.9 [12.5] ng·mL-1; OPG: 275.2 [83.8] pg·mL-1) and controls (P1NP: 58.5 [16.2] ng·mL-1; OC: 23.2 [11.9] ng·mL-1; OPG: 265.4 [97.6] pg·mL-1), with no differences in CTX, sclerostin, and RANKL. These results suggest that bone formation is higher in adolescent females engaged in high-impact sports like soccer compared with swimmers and controls.","PeriodicalId":49712,"journal":{"name":"Pediatric Exercise Science","volume":"35 1","pages":"41-47"},"PeriodicalIF":1.8,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10763879","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}

引用次数: 1

Correlates of Sedentary Time Among Children and Adolescents in Ethiopia: A Cross-Sectional Study. 埃塞俄比亚儿童和青少年久坐时间的相关性:一项横断面研究。

IF 1.8 4区医学

Pediatric Exercise Science Pub Date : 2023-02-01 DOI: 10.1123/pes.2021-0077

Sibhatu Biadgilign, Tennyson Mgutshini, Bereket Gebremichael, Demewoz Haile, Lioul Berhanu, Stanley Chitekwe, Peter Memiah

{"title":"Correlates of Sedentary Time Among Children and Adolescents in Ethiopia: A Cross-Sectional Study.","authors":"Sibhatu Biadgilign, Tennyson Mgutshini, Bereket Gebremichael, Demewoz Haile, Lioul Berhanu, Stanley Chitekwe, Peter Memiah","doi":"10.1123/pes.2021-0077","DOIUrl":"https://doi.org/10.1123/pes.2021-0077","url":null,"abstract":"Purpose: To assess the correlates of sedentary time among children and adolescents in Ethiopia.Methods: The study was conducted in representative samples of children and adolescents in the capital city of Ethiopia, Addis Ababa. Multivariable logistic regression models were used to determine associations of sedentary time and predictor variables.Results: The mean sedentary time was 4.61 (95% confidence interval [CI], 4.35-4.86) hours per day. Overall, the prevalence of high sedentary time (>3 h/d) was 68.2% (95% CI, 64.2-72.2). Results of multivariable logistic regression analyses showed a statistically significant association between high sedentary time and female household head (adjusted odds ratio [AOR] = 0.50; 95% CI, 0.32-0.80), literate mothers (AOR = 1.98; 95% CI, 1.26-3.11), child attending public school (AOR = 1.79; 95% CI, 1.12-2.85), children who belonged to the poor and rich household wealth tertiles compared with medium wealth tertile (AOR = 2.30; 95% CI, 1.42-3.72 and AOR = 2.04; 95% CI, 1.14-3.65, respectively), and those families that did not have adequate indoor play space for children (AOR = 0.45; 95% CI, 0.29-0.72).Conclusion: The study found that time spent sedentary was high in the study area as compared with other studies of similar settings. Several modifiable factors were identified that can be targeted in interventions to reduce sedentary time in the study setting.","PeriodicalId":49712,"journal":{"name":"Pediatric Exercise Science","volume":"35 1","pages":"15-22"},"PeriodicalIF":1.8,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10763878","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}

引用次数: 0

Bidirectional Daily Associations Between Accelerometer-Measured Sleep and Physical Activity in Brazilian High School Students. 加速计测量的巴西高中生睡眠与身体活动之间的双向日常关联。

IF 1.8 4区医学

Pediatric Exercise Science Pub Date : 2023-02-01 DOI: 10.1123/pes.2021-0177

Luís Eduardo Argenta Malheiros, Bruno Gonçalves Galdino da Costa, Marcus Vinícius Veber Lopes, Érico Pereira Gomes Felden, Kelly Samara da Silva

{"title":"Bidirectional Daily Associations Between Accelerometer-Measured Sleep and Physical Activity in Brazilian High School Students.","authors":"Luís Eduardo Argenta Malheiros, Bruno Gonçalves Galdino da Costa, Marcus Vinícius Veber Lopes, Érico Pereira Gomes Felden, Kelly Samara da Silva","doi":"10.1123/pes.2021-0177","DOIUrl":"https://doi.org/10.1123/pes.2021-0177","url":null,"abstract":"Purpose: This study analyzed day-to-day estimates of bidirectional associations between sleep parameters and intensity-specific physical activity and assessed whether the timing of physical activity influences these relationships.Methods: The sample was comprised of 651 high school students (51.2% female, 16.33 [1.0] y old) from southern Brazil. Physical activity and sleep were measured using accelerometers. Multilevel models were applied to test associations of nocturnal total sleep time, onset, and efficiency with moderate to vigorous and light (LPA) physical activity.Results: Higher engagement in moderate to vigorous physical activity and LPA was associated with increased total sleep time, and this effect was greater when physical activity was performed in the morning. Morning and evening LPA were associated with increased sleep efficiency and reduced total sleep time, respectively. Practice of LPA in the morning leads to early sleep onset, whereas evening LPA was associated with later onset. Higher total sleep time and later sleep onset were associated with lower moderate to vigorous physical activity and LPA on the following day. However, higher sleep efficiency was associated with increased LPA.Conclusion: The relationship between sleep parameters and physical activity is bidirectional and dependent on physical activity intensity and timing.","PeriodicalId":49712,"journal":{"name":"Pediatric Exercise Science","volume":"35 1","pages":"8-14"},"PeriodicalIF":1.8,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10774774","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}

引用次数: 0

Short-Term Muscle Power Is Related to Lower Limb Muscle Volume in Young Children. 幼儿短期肌肉力量与下肢肌肉量有关。

IF 1.8 4区医学

Pediatric Exercise Science Pub Date : 2023-02-01 DOI: 10.1123/pes.2021-0167

Steven J Obst, Kaysie Florance, Luke Heales, Sasha Job, Lee Barber

{"title":"Short-Term Muscle Power Is Related to Lower Limb Muscle Volume in Young Children.","authors":"Steven J Obst, Kaysie Florance, Luke Heales, Sasha Job, Lee Barber","doi":"10.1123/pes.2021-0167","DOIUrl":"https://doi.org/10.1123/pes.2021-0167","url":null,"abstract":"Purpose: Muscle power is a component of muscular fitness and is proportional to its volume. Reduced muscular fitness in children is linked to negative health outcomes. Associations between muscle volume (MV) and power have not been examined in young children and could reveal important insights into early neuromuscular development.Method: Forty-four children (2-8 y) completed 3 tests of short-term muscular power: repeated anaerobic sprint test, vertical jump, and horizontal jump. MV was assessed using 3D ultrasound for 3 lower limb muscles (rectus femoris, medial gastrocnemius, and tibialis anterior) and summed for across legs. Associations between muscular power and summed MV were assessed using Pearson correlation (r). Sex-based differences in muscular power and MV were assessed using 1-way analysis of covariance.Results: Moderate-strong associations (r = .57 - .87) were found between muscular power and summed MV. No differences were found between boys and girls for height, weight, MV, or muscular power.Conclusions: Young children who have larger lower limb muscles perform better at tasks dependent on short-term muscular power, such as running and jumping, compared with children with smaller muscles. Sex-based differences in short-term muscular power do not exist in young children and reflect similar anthropometry, including lower limb MV.","PeriodicalId":49712,"journal":{"name":"Pediatric Exercise Science","volume":"35 1","pages":"35-40"},"PeriodicalIF":1.8,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10776057","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}

引用次数: 0