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Pediatric Exercise Science

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https://www.readbyqxmd.com/read/28165870/a-comparison-of-exercise-induced-muscle-damage-following-maximal-eccentric-contractions-in-men-and-boys
#1
Chariklia K Deli, Ioannis G Fatouros, Vassilis Paschalis, Kalliopi Georgakouli, Athanasios Zalavras, Alexandra Avloniti, Yiannis Koutedakis, Athanasios Z Jamurtas
PURPOSE: Research regarding exercise-induced muscle-damage mainly focuses on adults. The present study examined exercise-induced muscle-damage responses in adults compared to children. METHOD: Eleven healthy boys (10-12y) and 15 healthy men (18-45y) performed 5 sets of 15 maximal eccentric contractions of the knee extensors. Range of motion (ROM), delayed onset muscle soreness (DOMS) during squat and walking, and peak isometric, concentric and eccentric torque were assessed before, post-, 24, 48, 72, and 96h post-exercise...
February 6, 2017: Pediatric Exercise Science
https://www.readbyqxmd.com/read/28165859/exercise-induced-hypoxemia-in-juvenile-thyroid-carcinoma-with-lung-metastases
#2
Florian J Segerer, Johannes Biko, Christoph Reiners, Clemens Wirth, Helge Hebestreit
PURPOSE: Exercise-induced arterial hypoxemia (EIAH) has been reported in patients with juvenile thyroid cancer treated with radioiodine for lung metastases. This retrospective study tested the hypothesis that EIAH is due to ventilation-perfusion-mismatch in this rare pulmonary condition. METHOD: 50 patients (age 13 -23 years) treated for juvenile thyroid carcinoma and lung metastasis with 131I and 24 controls with thyroid cancer but without lung metastases and prior 131I-treatment were assessed in a state of acute hypothyroidism by computed tomography of the lungs, pulmonary function testing, cardiopulmonary exercise test with measurements of gas exchange, oxygen saturation, alveolar-arterial difference in pO2 (p(A-a)O2) and pCO2 (p(ET-a)CO2)...
February 6, 2017: Pediatric Exercise Science
https://www.readbyqxmd.com/read/28121265/%C3%AE-alanine-supplementation-improves-throwing-velocities-in-repeated-sprint-ability-and-200-m-swimming-performance-in-young-water-polo-players
#3
Gabriel Machado Claus, Paulo Eduardo Redkva, Gabriel Mota Pinheiro Brisola, Elvis Sousa Malta, Rodrigo de Araujo Bonetti de Poli, Willian Eiji Miyagi, Alessandro Moura Zagatto
The purpose of this study was to investigate the effects of β-alanine supplementation on specific tests for water polo. Fifteen young water polo players (16±2years) underwent a 200-m swimming performance, repeated-sprint ability test (RSA) with free throw (shooting), and 30-s maximal teth-ered eggbeater kicks. Participants were randomly allocated into two groups (placebo x β-alanine) and supplemented with 6.4g∙day(-1) of β-alanine or a placebo for six weeks. The mean and total RSA times, the magnitude based inference analysis showed a likely beneficial effect for β-alanine sup-plementation (both 79...
January 25, 2017: Pediatric Exercise Science
https://www.readbyqxmd.com/read/28121246/associations-of-objectively-measured-physical-activity-and-sedentary-time-with-arterial-stiffness-in-pre-pubertal-children
#4
Eero A Haapala, Juuso Väistö, Aapo Veijalainen, Niina Lintu, Petri Wiklund, Kate Westgate, Ulf Ekelund, Virpi Lindi, Soren Brage, Timo A Lakka
PURPOSE: To investigate the relationships of objectively measured physical activity (PA) and sedentary time (ST) to arterial stiffness in pre-pubertal children. METHOD: Altogether 136 children (57 boys, 79 girls) aged 6-8-years participated in the study. Stiffness index (SI) was assessed by pulse contour analysis based on photoplethysmography. ST, light PA, moderate PA, and vigorous PA were assessed using combined acceleration and heart rate monitoring. We investigated the associations of ST (<1...
January 25, 2017: Pediatric Exercise Science
https://www.readbyqxmd.com/read/28121233/heart-rate-response-and-variability-following-maximal-exercise-in-overweight-children
#5
Justin P Guilkey, Brandon Dykstra, Jennifer Erichsen, Anthony D Mahon
PURPOSE: This study examined heart rate recovery (HRR) and heart rate variability (HRV) following maximal exercise in lean (<85th percentile age- and sex-BMI percentile; n=11 (♂=5; ♀=6); 10.1±0.7 years) and overweight (≥85th age- and sex-BMI percentile; n=11 (♂=5; ♀=6); 10.5±1.2 years) children. METHODS: Participants completed a 10-minute rest, followed by a graded exercise test to maximal effort. HRV, in the time and frequency domains, was assessed during rest and recovery...
January 25, 2017: Pediatric Exercise Science
https://www.readbyqxmd.com/read/28121232/minimum-wear-duration-for-the-activpal%C3%A2-professional-activity-monitor-in-adolescent-females
#6
Kieran P Dowd, Helen Purtill, Deirdre M Harrington, Jane F Hislop, John J Reilly, Alan E Donnelly
OBJECTIVES: This study aims to determine the minimum number of days of monitoring required to reliably predict sitting/lying time, standing time, light intensity physical activity (LIPA), moderate-to-vigorous intensity physical activity (MVPA) and steps in adolescent females. METHODS: 195 adolescent females (mean age=15.7 years; SD=0.9) participated in the study. Participants wore the activPAL activity monitor for a seven day protocol. The amount of time spent sitting/lying, standing, in LIPA and in MVPA and the number of steps per day were quantified...
25, 2017: Pediatric Exercise Science
https://www.readbyqxmd.com/read/28050932/physical-activity-levels-of-adolescents-with-type-1-diabetes
#7
Valderi Abreu de Lima, Luis Paulo Gomes Mascarenhas, Juliana Pereira Decimo, William Cordeiro de Souza, Anna Louise Stellfeld Monteiro, Ian Lahard, Suzana Nesi França, Neiva Leite
: The aim of this study was to evaluate the level of physical activity and cardiorespiratory fitness in teenagers with type 1 diabetes mellitus (T1D) in comparison with healthy scholar participants. Total of 154 teenagers (T1D=45 and CON=109). Height, weight, cardiorespiratory fitness (VO2max), and the level of physical activity by the Bouchard's Physical Activity Record were measured, and glycated hemoglobin (HbA1c) in T1D. The VO2 max was lower in the T1D (38.38 ± 7.54) in comparison with the CON (42...
January 4, 2017: Pediatric Exercise Science
https://www.readbyqxmd.com/read/28050926/normative-values-for-cardiorespiratory-fitness-testing-among-us-children-aged-6-11-years
#8
Jaime J Gahche, Brian K Kit, Janet E Fulton, Dianna D Carroll, Thomas Rowland
BACKGROUND: Nationally representative normative values for cardiorespiratory fitness (CRF) have not been described for US children since the mid 1980's. OBJECTIVE: To provide sex- and age-specific normative values for CRF of US children aged 6-11 years. METHODS: Data from 624 children aged 6-11 years who participated in the CRF testing as part of the 2012 National Health and Nutrition Examination Survey National Youth Fitness Survey, a cross-sectional survey, were analyzed...
January 4, 2017: Pediatric Exercise Science
https://www.readbyqxmd.com/read/28050919/resistance-training-effects-on-metabolic-function-among-youth-a-systematic-review
#9
Jennifer W Bea, Robert M Blew, Carol Howe, Megan Hetherington-Rauth, Scott B Going
PURPOSE: This systematic review evaluates the relationship between resistance training and metabolic function in youth. METHODS: PubMed, Embase, Cochrane Library, Web of Science, CINAHL, and ClinicalTrials.gov were searched for articles that: (1) studied children; (2) included resistance training; (3) were randomized interventions; and (4) reported markers of metabolic function. The selected studies were analyzed using the Cochrane Risk-of-Bias Tool. RESULTS: Thirteen articles met inclusion criteria...
January 4, 2017: Pediatric Exercise Science
https://www.readbyqxmd.com/read/28050917/acute-caffeine-ingestion-on-performance-in-young-judo-athletes
#10
Camilla Astley, Diego Souza, Marcos Polito
PURPOSE: To compare the acute effect of caffeine ingestion on performance in young judo athletes. METHODS: In a randomized double-blind design, eighteen judo athletes (16.1 ± 1.4 yrs.) were evaluated on three nonconsecutive days. On the first day, the special judo fitness test (SJFT) was used as a control session. On the second day, the sample was randomly divided into two equal groups. One group received 4 mg.kg(-1) of caffeine (capsule) and the other group received a placebo...
January 4, 2017: Pediatric Exercise Science
https://www.readbyqxmd.com/read/28050914/physiological-perceptual-and-performance-responses-associated-with-self-selected-versus-standardized-recovery-periods-during-a-repeated-sprint-protocol-in-elite-youth-football-players-a-preliminary-study
#11
Neil Gibson, Callum Brownstein, Derek Ball, Craig Twist
PURPOSE: To examine the physiological and perceptual responses of youth footballers to a repeated sprint protocol employing standardized and self-selected recovery. METHODS: Eleven male participants (13.7 ± 1.1 years) performed a repeated sprint assessment comprising 10 x 30 m efforts. Employing a randomized crossover design, repeated sprints were performed using 30 s and self-selected recovery periods. Heart rate was monitored continuously with ratings of perceived exertion (RPE) and lower body muscle power measured 2 min after the final sprint...
January 4, 2017: Pediatric Exercise Science
https://www.readbyqxmd.com/read/27834619/maturation-related-effect-of-low-dose-plyometric-training-on-performance-in-youth-hockey-players
#12
Jason Moran, Gavin R H Sandercock, Rodrigo Ramírez-Campillo, Oliver Todd, Collison, Dave A Parry
PURPOSE: The purpose of this intervention study was to investigate if a low-dose of plyometric training (PT) could improve sprint and jump performance in groups of different maturity status. METHODS: Male youth field hockey players were divided into Pre-PHV (from -1 to -1.9 from PHV; Experimental: n = 9; Control = 12) and Mid-PHV (0 to +0.9 from PHV; Experimental: n = 8; Control = 9) groups. Participants in the experimental groups completed 60 foot contacts, twice-weekly, for 6 weeks...
November 11, 2016: Pediatric Exercise Science
https://www.readbyqxmd.com/read/27834608/factors-associated-with-moderate-to-vigorous-physical-activity-in-adolescents-born-preterm
#13
Ketsia Proulx, Annette Majnemer, Noémi Dahan-Oliel, Barbara Mazer, Line Nadeau, Kathleen Vanier, Désirée B Maltais
PURPOSE: Little is known about the physical activity of adolescents born prematurely. This study aimed to: 1) describe relationships between moderate to vigorous physical activity (MVPA) in adolescents born prematurely and various factors and, 2) compare their MVPA level to guidelines. METHODS: A secondary analysis was performed using data from 64 adolescents (16.1 ± 2.5 years old, born ≤29 weeks gestation; 57.8% girls). Time spent in MVPA was based on accelerometry data...
November 11, 2016: Pediatric Exercise Science
https://www.readbyqxmd.com/read/27834578/serum-adiponectin-levels-and-cardiorespiratory-fitness-in-non-overweight-and-overweight-portuguese-adolescents-the-labmed-physical-activity-study
#14
César Agostinis-Sobrinho, Carla Moreira, Sandra Abreu, Luis Lopes, José Oliveira-Santos, Jostein Steene-Johannessen, Jorge Mota, Rute Santos
PURPOSE: This study examined the independent associations between cardiorespiratory fitness and circulating adiponectin concentration in adolescents, controlling for several potential covariates. METHODS: This is a cross-sectional study in Portuguese adolescents. A sample of 529 (267 girls) aged 12-18 years were included and categorized as overweight and non-overweight. Cardiorespiratory fitness was assessed by 20 meters shuttle run test. We measured serum adiponectin, high-sensitivity C-reactive protein, fasting glucose, insulin and HDL-cholesterol...
November 11, 2016: Pediatric Exercise Science
https://www.readbyqxmd.com/read/27854182/trainability-of-young-athletes-short-term-goals-or-long-term-mission
#15
Craig A Williams
No abstract text is available yet for this article.
November 2016: Pediatric Exercise Science
https://www.readbyqxmd.com/read/27705538/the-adolescent-athlete-a-developmental-approach-to-injury-risk
#16
Damien McKay, Carolyn Broderick, Katharine Steinbeck
With the advent of long-term athlete development programs and early sport specialization, the training of elite athletes now spans the period of adolescence. Adolescence represents a period of physical, psychosocial and cognitive development, but also a time of physical and psychological vulnerability. Changes in skeletal and physiological attributes coincide with an increased risk of sport related injury. A window of vulnerability is shaped by the properties of the musculoskeletal system, the influence of pubertal hormones and the lag time between physical and cognitive development...
November 2016: Pediatric Exercise Science
https://www.readbyqxmd.com/read/27705537/a-longitudinal-study-of-physical-fitness-in-elite-junior-tennis-players
#17
Tamara Kramer, Barbara C H Huijgen, Marije T Elferink-Gemser, Chris Visscher
PURPOSE: To analyze how physical fitness (PF) improves in elite junior tennis players related to age, maturity, and performance level. METHODS: Elite junior tennis players (n = 113 boys, n = 83 girls) divided by performance level were monitored longitudinally from U14 to U16. Maturity, upper and lower-body power, speed, and agility were measured during subsequent competitive seasons. Improvement was analyzed per sex using multilevel analysis. RESULTS: PF components for boys and girls improved over age (U14-U16) (ES ...
November 2016: Pediatric Exercise Science
https://www.readbyqxmd.com/read/27705536/physiological-adaptations-following-resistance-training-in-youth-athletes-a-narrative-review
#18
Kirsten Legerlotz, Robert Marzilger, Sebastian Bohm, Adamantios Arampatzis
PURPOSE: To understand the mechanisms for the effects of resistance training on functional parameters, and to assess the injury risk of the involved tissues, it is necessary to examine the underlying morphological and structural changes of the respective tissues. METHODS: The presented information on physiological adaptations have been deduced from cross-sectional studies comparing youth athletes with controls and children with adults as well as from longitudinal studies examining the effects of resistance training in untrained children and adolescents and in youth athletes...
November 2016: Pediatric Exercise Science
https://www.readbyqxmd.com/read/27633491/the-1-500-m-rowing-performance-is-highly-dependent-on-modified-wingate-anaerobic-test-performance-in-national-level-adolescent-rowers
#19
Hugo Maciejewski, Abderrahmane Rahmani, Frédéric Chorin, Julien Lardy, Caroline Giroux, Sébastien Ratel
PURPOSE: The aim of the current study was to determine whether the anaerobic performance assessed by a modified Wingate test could account for the 1,500-m rowing ergometer performance in young competitive rowers. METHODS: Fourteen national-level adolescent rowers performed on a rowing ergometer i) a 30-s allout exercise (i.e., modified Wingate test) and ii) a 1,500-m all-out exercise (i.e., rowing performance). For each of these two exercises, the mean power output was considered as the main performance criterion (PWIN and P1500, respectively)...
November 2016: Pediatric Exercise Science
https://www.readbyqxmd.com/read/27615264/the-effect-of-steroid-hormones-on-the-physical-performance-of-boys-and-girls-during-an-olympic-weightlifting-competition
#20
Blair Crewther, Zbigniew Obminski, Christian Cook
PURPOSE: To examine the steroid hormone effect on the physical performance of young athletes during an Olympic weightlifting competition. METHODS: 26 boys and 26 girls were monitored across 2 weightlifting competitions. Pre- and post-competition testosterone (T), cortisol (C) and dehydroepiandrosterone-sulfate (DHEA-s) were measured in blood, with pre-event free T (FT) and the free androgen index (FAI) calculated. Body mass (BM) and weightlifting performance were recorded...
November 2016: Pediatric Exercise Science
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