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Pediatric Exercise Science

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https://www.readbyqxmd.com/read/29683771/wnt-signaling-related-osteokines-at-rest-and-following-plyometric-exercise-in-prepubertal-and-early-pubertal-boys-and-girls
#1
Panagiota Klentrou, Kirina Angrish, Nafisa Awadia, Nigel Kurgan, Rozalia Kouvelioti, Bareket Falk
PURPOSE: This study examined osteokines related to Wnt signaling at rest and in response to plyometric exercise in 12 boys [10.2 (0.4) y] and 12 girls [10.5 (0.4) y]. METHODS: One resting (preexercise) and 3 postexercise (5 min, 1 h, and 24 h) blood samples were analyzed for sclerostin, dickkopf-related protein 1 (DKK-1), osteoprotegerin (OPG), and receptor activator of nuclear factor kappa-β ligand (RANKL). RESULTS: Girls had higher resting sclerostin than boys [187...
April 23, 2018: Pediatric Exercise Science
https://www.readbyqxmd.com/read/29580176/reliability-and-validity-of-tethered-swimming-lactate-minimum-test-and-their-relationship-with-performance-in-young-swimmers
#2
Carlos Augusto Kalva-Filho, Argyris Toubekis, Alessandro Moura Zagatto, Adelino Sanchez Ramos da Silva, João Paulo Loures, Eduardo Zapaterra Campos, Marcelo Papoti
PURPOSE: To test the reliability and validity of tethered swimming lactate minimum test in young swimmers. METHODS: Lactate minimum test was performed twice to test the reliability (experiment 1; n = 13). In addition, the validity was investigated through lactate minimum test relationships with tethered swimming lactate threshold and peak force obtained during graded exercise test (experiment 2; n = 11). Finally, the correlations with mean speeds observed during 200-m (s200m) and 30-minute continuous efforts (s30min) were also analyzed (experiment 3; n = 15)...
March 27, 2018: Pediatric Exercise Science
https://www.readbyqxmd.com/read/29546801/100-m-breaststroke-swimming-performance-in-youth-swimmers-the-predictive-value-of-anthropometrics
#3
Senda Sammoud, Alan Michael Nevill, Yassine Negra, Raja Bouguezzi, Helmi Chaabene, Younés Hachana
This study aimed to estimate the optimal body size, limb segment length, and girth or breadth ratios of 100-m breaststroke performance in youth swimmers. In total, 59 swimmers [male: n = 39, age = 11.5 (1.3) y; female: n = 20, age = 12.0 (1.0) y] participated in this study. To identify size/shape characteristics associated with 100-m breaststroke swimming performance, we computed a multiplicative allometric log-linear regression model, which was refined using backward elimination. Results showed that the 100-m breaststroke performance revealed a significant negative association with fat mass and a significant positive association with the segment length ratio (arm ratio = hand length/forearm length) and limb girth ratio (girth ratio = forearm girth/wrist girth)...
March 16, 2018: Pediatric Exercise Science
https://www.readbyqxmd.com/read/29543127/agreement-between-standard-body-composition-methods-to-estimate-percentage-of-body-fat-in-young-male-athletes
#4
Asunción Ferri-Morales, Marcus Vinicius Nascimento-Ferreira, Dimitris Vlachopoulos, Esther Ubago-Guisado, Ana Torres-Costoso, Augusto Cesar F De Moraes, Alan R Barker, Luis A Moreno, Vicente Martínez-Vizcaino, Luis Gracia-Marco
PURPOSE: To examine the intermethods agreement of dual-energy X-ray absorptiometry (DXA) and foot-to-foot bioelectrical impedance analysis (BIA) to assess the percentage of body fat (%BF) in young male athletes using air-displacement plethysmography (ADP) as the reference method. METHODS: Standard measurement protocols were carried out in 104 athletes (40 swimmers, 37 footballers, and 27 cyclists, aged 12-14 y). RESULTS: Age-adjusted %BF ADP and %BF BIA were significantly higher in swimmers than footballers...
March 15, 2018: Pediatric Exercise Science
https://www.readbyqxmd.com/read/29543126/effect-of-a-suspension-trainer-based-movement-program-on-measures-of-fitness-and-functional-movement-in-children-a-pilot-study
#5
Christine W St Laurent, Brittany Masteller, John Sirard
PURPOSE: The purpose of this pilot study was to assess the efficacy of a suspension-training movement program to improve muscular- and skill-related fitness and functional movement in children, compared with controls. METHODS: In total, 28 children [male: 46%; age: 9.3 (1.5) y; body mass index percentile: 68.6 (27.5)] were randomly assigned to intervention (n = 17) or control (n = 11) groups. The intervention group participated in a 6-week suspension-training movement program for two 1-hour sessions per week...
March 15, 2018: Pediatric Exercise Science
https://www.readbyqxmd.com/read/29543124/age-predicted-maximal-heart-rate-equations-are-inaccurate-for-use-in-youth-male-soccer-players
#6
Zackary S Cicone, Oleg A Sinelnikov, Michael R Esco
PURPOSE: The purpose of this study was to compare the differences between measured (MHRobt ) and predicted (MHRpred ) maximal heart rate (MHR) in youth athletes. METHODS: In total, 30 male soccer players [14.6 (0.6) y] volunteered to participate in this study. MHRobt was determined via maximal-effort graded exercise test. Age-predicted MHR (MHRpred ) was calculated for each participant using equations by Fox, Tanaka, Shargal, and Nikolaidis. Mean differences were compared using Friedman's 2-way analysis of variance and post hoc pairwise comparisons...
March 15, 2018: Pediatric Exercise Science
https://www.readbyqxmd.com/read/29543117/physical-activity-bmi-and-blood-pressure-in-us-youth-nhanes-2003-2006
#7
Heather Hayes Betz, Joey C Eisenmann, Kelly R Laurson, Katrina D DuBose, Mathew J Reeves, Joseph J Carlson, Karin A Pfeiffer
PURPOSE: The objective of this study was to examine the independent and combined association of physical activity and body mass index (BMI) with blood pressure in youth. METHODS: Youth aged 8-18 years from the 2003-2006 National Health and Nutrition Examination Survey (NHANES) with BMI, blood pressure, and physical activity (accelerometer) were included in the analyses. A total of 2585 subjects (1303 males; 47% of all 8- to 18-year-olds) met these criteria. RESULTS: Obese youth had a systolic blood pressure that was 8 mm Hg higher than normal weight youth...
March 15, 2018: Pediatric Exercise Science
https://www.readbyqxmd.com/read/29543115/the-association-between-perceived-athletic-competence-and-physical-activity-implications-for-low-income-schoolchildren
#8
Sarah A Amin, Paula J Duquesnay, Catherine M Wright, Kenneth Chui, Christina D Economos, Jennifer M Sacheck
PURPOSE: Socioeconomic status (SES) may impact children's physical activity (PA) behaviors and confidence to participate in PA. We examined how SES modifies the relationship between children's perceived athletic competence (PAC) and moderate to vigorous PA (MVPA). METHODS: Children (N = 1157; 45% male; grades 3-4) were recruited for the Fueling Learning through Exercise study. Free/reduced price lunch eligibility was used as an indicator of SES. Seven-day accelerometry (ActiGraph GT3X+) was used to measure daily MVPA, out-of-school MVPA (O-MVPA), and school-time MVPA...
March 15, 2018: Pediatric Exercise Science
https://www.readbyqxmd.com/read/29526135/physical-fitness-is-longitudinally-associated-with-academic-performance-during-childhood-and-adolescence-and-waist-circumference-mediated-the-relationship
#9
Rodrigo Antunes Lima, Lisbeth Runge Larsen, Anna Bugge, Lars Bo Andersen
PURPOSE: The current investigation aimed to investigate the longitudinal association between physical fitness and academic performance over 3 years in adolescents. A secondary aim was to determine to what extent waist circumference mediated the association between physical fitness and academic performance. METHODS: For the current study, 1020 students from first grade [mean age: 7.87 (0.34) y] to fifth grade [mean age: 11.87 (0.37) y] were monitored annually for 3 years (2010-2013)...
March 10, 2018: Pediatric Exercise Science
https://www.readbyqxmd.com/read/29485937/relationship-among-changes-in-sedentary-time-physical-activity-and-body-mass-index-in-young-schoolchildren-a-3-year-longitudinal-study
#10
Amanda Santos, Sandra Silva-Santos, Michael Duncan, Maria João Lagoa, Susana Vale, Jorge Mota
PURPOSES: To examine the association between sedentary time (ST) and light physical activity (LPA), moderate- to vigorous-intensity physical activity (MVPA), and body mass index (BMI), and to track these behaviors over a 3-year follow-up in young schoolchildren. METHODS: The final sample was 64 children (female: n = 36 or 56.3%), enrolled in schools in Porto, Portugal. Height and mass of children were measured by standard methods, and BMI was then calculated...
February 27, 2018: Pediatric Exercise Science
https://www.readbyqxmd.com/read/29485933/acute-effect-of-intermittent-exercise-and-action-based-video-game-breaks-on-math-performance-in-preadolescent-children
#11
Shannon S Block, Trevor R Tooley, Matthew R Nagy, Molly P O'Sullivan, Leah E Robinson, Natalie Colabianchi, Rebecca E Hasson
PURPOSE: The purpose of this study was to compare the acute effects of video game breaks and intermittent exercise breaks, performed at varying intensities, on math performance in preadolescent children. METHODS: A total of 39 children (18 males and 21 females; aged 7-11 y) completed 4 experimental conditions in random order: 8 hours of sitting interrupted with 20 two-minute low-, moderate-, or high-intensity exercise breaks or 20 two-minute sedentary computer game breaks...
February 27, 2018: Pediatric Exercise Science
https://www.readbyqxmd.com/read/29485929/ventilatory-responses-during-submaximal-exercise-in-children-with-prader-willi-syndrome
#12
Adam M Hyde, Robert G McMurray, Frank A Chavoya, Daniela A Rubin
PURPOSE: Prader-Willi syndrome (PWS) is a genetic neurobehavioral disorder presenting hypothalamic dysfunction and adiposity. At rest, PWS exhibits hypoventilation with hypercapnia. We characterized ventilatory responses in children with PWS during exercise. METHODS: Participants were children aged 7-12 years with PWS (n = 8) and without PWS with normal weight (NW; n = 9, body mass index ≤ 85th percentile) or obesity (n = 9, body mass index ≥ 95th percentile)...
February 27, 2018: Pediatric Exercise Science
https://www.readbyqxmd.com/read/29485920/age-related-differences-in-functional-hamstring-quadriceps-ratio-following-soccer-exercise-in-female-youth-players-an-injury-risk-factor
#13
Mark De Ste Croix, Abigail Priestley, Rhodri Lloyd, Jon Oliver
PURPOSE: Fatigue negatively alters dynamic knee control, and the functional hamstring/quadriceps ratio (H/QFUNC ) plays an important role in stabilizing the joint. The aim of this study was to investigate the influence of soccer-specific exercise on H/QFUNC in under (U) 13-, U15-, and U17-year-old female soccer players. METHODS: A total of 36 female players performed concentric and eccentric actions of the hamstrings at 60°, 120°, and 180°/s before and after an age group-specific field-based soccer protocol...
February 27, 2018: Pediatric Exercise Science
https://www.readbyqxmd.com/read/29478381/relationships-between-training-load-sleep-duration-and-daily-well-being-and-recovery-measures-in-youth-athletes
#14
Thomas Sawczuk, Ben Jones, Sean Scantlebury, Kevin Till
PURPOSE: To assess the relationships between training load, sleep duration, and 3 daily well-being, recovery, and fatigue measures in youth athletes. METHODS: Fifty-two youth athletes completed 3 maximal countermovement jumps (CMJs), a daily well-being questionnaire (DWB), the perceived recovery status scale (PRS), and provided details on their previous day's training loads (training) and self-reported sleep duration (sleep) on 4 weekdays over a 7-week period. Partial correlations, linear mixed models, and magnitude-based inferences were used to assess the relationships between the predictor variables (training and sleep) and the dependent variables (CMJ, DWB, and PRS)...
February 24, 2018: Pediatric Exercise Science
https://www.readbyqxmd.com/read/29478378/the-effects-of-3-month-skill-based-and-plyometric-conditioning-on-fitness-parameters-in-junior-female-volleyball-players
#15
Kemal Idrizovic, Bahri Gjinovci, Damir Sekulic, Ognjen Uljevic, Paulo Vicente João, Miodrag Spasic, Tine Sattler
PURPOSE: This study compared the effects of skill-based and plyometric conditioning (both performed in addition to regular volleyball training twice a week for 12 wk) on fitness parameters in female junior volleyball players. METHODS: The participants [n = 47; age: 16.6 (0.6) y; mass: 59.4 (8.1) kg; height: 175.1 (3.0) cm] were randomized into a plyometric (n = 13), a skill-based (n = 17), and a control (n = 17) groups. The variables included body height, body mass, calf girth, calf skinfold, corrected calf girth, countermovement jump, 20-m-sprint, medicine ball toss, and sit-and-reach test...
February 24, 2018: Pediatric Exercise Science
https://www.readbyqxmd.com/read/29478372/age-related-differences-in-spatiotemporal-variables-and-ground-reaction-forces-during-sprinting-in-boys
#16
Ryu Nagahara, Yohei Takai, Miki Haramura, Mirai Mizutani, Akifumi Matsuo, Hiroaki Kanehisa, Tetsuo Fukunaga
PURPOSE: We aimed to elucidate age-related differences in spatiotemporal and ground reaction force variables during sprinting in boys over a broad range of chronological ages. METHODS: Ground reaction force signals during 50-m sprinting were recorded in 99 boys aged 6.5-15.4 years. Step-to-step spatiotemporal variables and mean forces were then calculated. RESULTS: There was a slower rate of development in sprinting performance in the age span from 8...
February 24, 2018: Pediatric Exercise Science
https://www.readbyqxmd.com/read/29485938/erratum-lakes-et-al-2017
#17
(no author information available yet)
In the article by Lakes KD, Abdullah MM, Youssef J, et al. Assessing parent perceptions of physical activity in families of toddlers with neurodevelopmental disorders: The Parent Perceptions of Physical Activity Scale (PPPAS), Pediatr Exerc Sci. 2017; 29: 396-407, https://doi.org/10.1123/pes.2016-0213 , an author's name was incorrectly listed. Shlomit Aizik should have been listed as Shlomit Radom-Aizik. The online version of this article has been corrected. We apologize for this error.
May 1, 2018: Pediatric Exercise Science
https://www.readbyqxmd.com/read/29485935/the-use-of-a-wheelchair-propulsion-field-test-to-determine-peak-heart-rate-in-children-and-adolescents-with-myelomeningocele
#18
Marisa Maia Leonardi-Figueiredo, Mariana Angélica de Souza, Elisangela Aparecida da Silva Lizzi, Luciano Fonseca Lemos de Oliveira, Julio Cesar Crescencio, Pedro Vellosa Schwartzmann, Lourenço Gallo, Ana Claudia Mattiello-Sverzut
PURPOSE: We analyzed the evolution and pattern of heart rate (HR) during the 12-minute wheelchair propulsion field test (WPFT) and compared the peak HR (HRpeak ) from the WPFT to the HRpeak obtained in the progressive cardiopulmonary exercise test on arm cranking ergometer (ACT). We aimed to determine if the field test detects the HRpeak consistently and could be used in clinical practice. METHODS: Eleven wheelchair-using children and adolescents with myelomeningocele (aged 8-15 y) performed a maximal ACT and a 12-minute WPFT...
May 1, 2018: Pediatric Exercise Science
https://www.readbyqxmd.com/read/29417877/children-s-compliance-with-wrist-worn-accelerometry-within-a-cluster-randomized-controlled-trial-findings-from-the-healthy-lifestyles-programme
#19
Lisa Price, Katrina Wyatt, Jenny Lloyd, Charles Abraham, Siobhan Creanor, Sarah Dean, Melvyn Hillsdon
PURPOSE: The purpose of this study was to assess children's compliance with wrist-worn accelerometry during a randomized controlled trial and to examine whether compliance differed by allocated condition or gender. METHODS: A total of 886 children within the Healthy Lifestyles Programme trial were randomly allocated to wear a GENEActiv accelerometer at baseline and 18-month follow-up. Compliance with minimum wear-time criteria (≥10 h for 3 weekdays and 1 weekend day) was obtained for both time points...
May 1, 2018: Pediatric Exercise Science
https://www.readbyqxmd.com/read/29276857/mental-fatigue-impairs-physical-performance-in-young-swimmers
#20
Eduardo Macedo Penna, Edson Filho, Samuel Penna Wanner, Bruno Teobaldo Campos, Gabriel Resende Quinan, Thiago Teixeira Mendes, Mitchell Robert Smith, Luciano Sales Prado
PURPOSE: This study aimed to investigate the impact of mental fatigue on heart rate variability, subjective measures of fatigue, and swimming performance in young athletes. METHODS: Sixteen swimmers [15.45 (0.51) y old, 7.35 (2.20) y of swimming experience] performed a 1500-m time trial on 2 occasions separated by an interval of at least 72 hours. The 1500-m swimming was preceded by a 30-minute treatment that consisted of performing the Stroop Color and Word test to induce mental fatigue (experimental trial) or watching an emotionally neutral video (control trial)...
May 1, 2018: Pediatric Exercise Science
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