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https://www.readbyqxmd.com/read/29668045/when-does-the-influence-of-maturation-on-anthropometric-and-physical-fitness-characteristics-increase-and-subside
#1
Christopher Towlson, Stephen Cobley, Guy Parkin, Ric Lovell
The relationships between maturation and anthropometric and physical performance characteristics are dynamic and often asynchronous; confounding the capability to accurately evaluate performance during adolescence. This study aimed to (i) examine the influence of chronological age (CA) and somatic maturation (YPHV) upon anthropometric and physical performance parameters, and (ii) identify the transition/change time-points in these relationships using segmental regression. N=969 soccer players (8-18 years of age) completed anthropometric and physical test assessments, including a counter-movement jump (CMJ), agility T-test, 10 and 20m sprints, and multi-stage fitness test (MSFT)...
April 18, 2018: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/29662910/outcomes-and-return-to-sport-after-revision-anterior-cruciate-ligament-reconstruction-in-adolescent-athletes
#2
Michael Saper, Stephanie Pearce, Joseph Shung, Robert Zondervan, Roger Ostrander, James R Andrews
Background: The number of adolescent anterior cruciate ligament (ACL) injuries is rising with increased participation in higher level athletics at earlier ages. With an increasing number of primary ACL reconstructions (ACLRs) comes a rise in the incidence of revision ACLRs. Purpose: To evaluate the clinical results of revision ACLR across a group of high-level adolescent athletes with at least 2-year follow-up. Study Design: Case series; Level of evidence, 4...
April 2018: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/29662750/return-to-play-in-adolescent-athletes-with-symptomatic-spondylolysis-without-listhesis-a-meta-analysis
#3
REVIEW
Samuel C Overley, Steven J McAnany, Steve Andelman, Jun Kim, Robert K Merrill, Samuel K Cho, Sheeraz A Qureshi, Andrew C Hecht
Study Design: Meta-analysis. Objectives: To assess return to play (RTP) rates in adolescent athletes with lumbar spondylolysis without spondylolisthesis treated conservatively or operatively. Methods: A review of Medline, EMBASE, and Cochrane Reviews was performed. The pooled results were performed by calculating the effect size based on the logit event rate. Studies were weighted by the inverse of the variance. Confidence intervals were reported at 95%...
April 2018: Global Spine Journal
https://www.readbyqxmd.com/read/29658150/proximal-patellar-tendon-pathology-can-develop-during-adolescence-in-young-ballet-dancers-a-2-year-longitudinal-study
#4
A Rudavsky, J L Cook, S Docking
PURPOSE: Patellar tendinopathy (tendon pain and dysfunction), or jumper's knee is prevalent in adult jumping athletes. Pathology in the proximal patellar tendon is a key risk factor for developing patellar tendinopathy. When pathology develops in the proximal patellar tendon is not known, though it is reported to exist in adolescent athletes. The aim of this study was to follow young jumping athletes (ballet dancers) through adolescence to identify if pathology develops and its relation to the adolescent growth spurt...
April 15, 2018: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/29648462/a-systematic-review-of-neuroimaging-findings-in-children-and-adolescents-with-sports-related-concussion
#5
Emilie Chamard, Jonathan D Lichtenstein
BACKGROUND: Sport-related concussion (SRC) generally does not result in structural anomalies revealed through clinical imaging techniques such as MRI and CT. While advanced neuroimaging techniques offer another avenue to investigate the subtle alterations following SRC, the current pediatric literature in this area has yet to be reviewed. The aim of this review is to systematically explore the literature on magnetic resonance spectroscopy (MRS), diffusion tensor imaging (DTI), functional magnetic resonance imaging (fMRI), and cortical thickness following SRC in children and adolescents...
April 12, 2018: Brain Injury: [BI]
https://www.readbyqxmd.com/read/29628891/training-load-immune-status-and-clinical-outcomes-in-young-athletes-a-controlled-prospective-longitudinal-study
#6
Katharina Blume, Nina Körber, Dieter Hoffmann, Bernd Wolfarth
Introduction: Beside positive effects on athlete's health, competitive sport can be linked with an increased risk of illness and injury. Because of high relative increases in training, additional physical and psychological strains, and an earlier specialization and professionalization, adolescent athletes needs an increased attention. Training can alter the immune system by inducing a temporary immunosuppression, finally developing infection symptoms. Previous studies identified Epstein Barr Virus (EBV) as potential indicator for the immune status...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29626614/effects-of-whole-body-vibration-on-tibia-strength-and-structure-of-competitive-adolescent-swimmers-a-randomized-controlled-trial
#7
Alejandro Gómez-Bruton, Alejandro González-Agüero, Angel Matute-Llorente, Cristina Julián, Gabriel Lozano-Berges, Alba Gómez-Cabello, Nuria Garatachea, Jose A Casajús, German Vicente-Rodríguez
BACKGROUND: Swimming has no effect on bone mass or structure. Therefore, adolescent swimmers present similar bone strength values when compared to normo-active controls, and lower values when compared to weight-bearing athletes. It thus seems necessary to try to improve bone structure and strength of adolescent swimmers through a weight-bearing intervention in order to reduce the risk of suffering osteoporosis later in life. OBJECTIVE: To evaluate the effects of a 6-month WBV intervention on bone strength and structure of adolescent swimmers...
April 4, 2018: PM & R: the Journal of Injury, Function, and Rehabilitation
https://www.readbyqxmd.com/read/29623052/the-relationship-between-range-of-motion-and-injuries-in-adolescent-dancers-and-sportspersons-a-systematic-review
#8
Joyce M Storm, Roger Wolman, Eric W P Bakker, Matthew A Wyon
Background: The frequent and intensive training and performance of pre-professional ballet dancers and sportspersons is offered at a time when young ballet dancers and young athletes may be vulnerable to injury due to the progress through adolescence and growth spurts. Hypothesis: There are changes in range of motion during the progress through adolescence and growth periods in dancers and sportspersons. These changes in ROM can be linked to the increase of injury. Objectives: The primary aim of this systematic review is to determine whether there are changes in ROM during the progress through adolescence and growth spurts in dancers and sportspersons...
2018: Frontiers in Psychology
https://www.readbyqxmd.com/read/29621580/use-of-nutritional-supplements-contaminated-with-banned-doping-substances-by-recreational-adolescent-athletes-in-athens-greece
#9
Konstantinos Tsarouhas, Nassia Kioukia-Fougia, Petros Papalexis, Aristidis Tsatsakis, Dimitrios Kouretas, Flora Bacopoulou, Christina Tsitsimpikou
Although the use of nutritional supplements by adult athletes has been extensively studied, information on supplements consumption by adolescent athletes is still limited. The present study reports on the use of nutritional supplements contaminated with banned doping substances among 170 recreational adolescent athletes from eleven, randomly selected, gym centres, in Athens, Greece. Nutritional supplements consumption was reported by almost 60% of the study population, with proteins/amino acids and vitamins being the most popular...
April 2, 2018: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/29621016/impact-normative-data-of-ethnically-diverse-adolescent-athletes
#10
William T Tsushima, Vincent G Tsushima, Nathan M Murata
OBJECTIVE: The aim of this research was to develop preliminary norms for the Immediate Post-Concussion Assessment and Cognitive Testing (ImPACT) administered to a large sample of adolescent athletes from diverse ethnic backgrounds. DESIGN: A retrospective records review. SETTING: Middle and high school athletic departments. PARTICIPANTS: A total of 5741 male and female adolescent athletes in Hawaii, aged 13 to 18 years, in grades 9 to 12 were included in the study...
April 4, 2018: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
https://www.readbyqxmd.com/read/29602303/hop-distance-symmetry-does-not-indicate-normal-landing-biomechanics-in-adolescent-athletes-with-recent-anterior-cruciate-ligament-reconstruction
#11
Tishya A L Wren, Nicole M Mueske, Christopher H Brophy, J Lee Pace, Mia J Katzel, Bianca R Edison, Curtis D VandenBerg, Tracy L Zaslow
Study Design Retrospective cohort. Background Return to sport (RTS) protocols after anterior cruciate ligament reconstruction (ACLR) often include assessment of hop distance symmetry. However, it is unclear if movement deficits are present regardless of hop symmetry. Objectives To assess biomechanics and symmetry of adolescent athletes following ACLR during a single leg hop for distance. Methods Forty-six patients with ACLR (5-12 months post-surgery; 27 female; age 15.6, SD 1.7 years) were classified as asymmetric (operative limb hop distance <90% of non-operative limb; n=17) or symmetric (n=29)...
March 30, 2018: Journal of Orthopaedic and Sports Physical Therapy
https://www.readbyqxmd.com/read/29601343/a-preliminary-investigation-of-accelerometer-derived-sleep-and-physical-activity-following-sport-related-concussion
#12
Alicia M Sufrinko, Erin K Howie, R J Elbin, Michael W Collins, Anthony P Kontos
OBJECTIVE: Describe changes in postconcussion activity levels and sleep throughout recovery in a sample of pediatric sport-related concussion (SRC) patients, and examine the predictive value of accelerometer-derived activity and sleep on subsequent clinical outcomes at a follow-up clinic visit. SETTING: Outpatient concussion clinic. PARTICIPANTS: Twenty athletes aged 12 to 19 years with diagnosed SRC. METHODS: Prospective study including visit 1 (<72 hours postinjury) and visit 2 (6-18 days postinjury)...
March 29, 2018: Journal of Head Trauma Rehabilitation
https://www.readbyqxmd.com/read/29593182/high-defect-stage-contralateral-defects-and-poor-flexibility-are-negative-predictive-factors-of-bone-union-in-pediatric-and-adolescent-athletes-with-spondylolysis
#13
Kazufumi Yamazaki, Shintaro Kota, Daisuke Oikawa, Yoshiji Suzuki
PURPOSE: To identify predisposition to spondylolysis and physical characteristics associated with "bone union" following conservative spondylolysis treatment among pediatric and adolescent athletes. METHODS: We retrospectively analyzed pediatric and adolescent athletes with spondylolysis who underwent conservative treatment and rehabilitation for three or more consecutive months following sports activity cessation. Patients with terminal spondylolysis or who did not discontinue sports activities were excluded...
2018: Journal of Medical Investigation: JMI
https://www.readbyqxmd.com/read/29584576/improvements-of-shooting-performance-in-adolescent-air-rifle-athletes-after-a-6-week-balance-and-respiration-training-programs
#14
Han-Kyu Park, Dong-Woo Kim, Tae-Ho Kim
CONTEXT: Several factors, such as balance and respiration training programs, have been identified as contributing to the establishment of a shooting performance. However, little is known about the benefits of these programs on the shooting record, among adolescent air rifle athletes. OBJECTIVE: To determine whether there is a gain in the shooting record, among adolescent air rifle athletes, after participation in balance and respiration training programs. DESIGN: Case-control study...
March 27, 2018: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/29579702/gait-and-footwear-in-children-and-adolescents-with-charcot-marie-tooth-disease-a-cross-sectional-case-controlled-study
#15
Rachel A Kennedy, Jennifer L McGinley, Kade L Paterson, Monique M Ryan, Kate Carroll
OBJECTIVE: Children with Charcot-Marie-Tooth disease (CMT) report problems with gait and footwear. We evaluated differences in spatio-temporal gait variables and gait variability between children with CMT and typically developing (TD) children, and investigated the effect of footwear upon gait. METHOD: A cross-sectional study of 30 children with CMT and 30 age- and gender-matched TD children aged 4-18 years. Gait was assessed at self-selected speed on an electronic walkway while barefoot and in two types of the child's own footwear; optimal (e...
March 19, 2018: Gait & Posture
https://www.readbyqxmd.com/read/29576037/the-mediating-role-of-coping-between-competitive-anxiety-and-sport-commitment-in-adolescent-athletes
#16
Joan Pons, Carme Viladrich, Yago Ramis, Remco Polman
Framed in cognitive-motivational-relational theory of emotions (Lazarus, 1999), this study aimed to test how coping mediated the relationship between competitive anxiety and sport commitment in a sample of adolescent athletes. Five-hundred adolescents (M = 16.42; SD = 1.54) participated in our study. Participants completed competitive anxiety, coping, and sport commitment measures. We defined the measurement model using confirmatory factor analysis and exploratory structural equation modeling; and compared two different models of mediation (i...
March 26, 2018: Spanish Journal of Psychology
https://www.readbyqxmd.com/read/29564304/track-and-field-practice-and-bone-outcomes-among-adolescents-a-pilot-study-abcd-growth-study
#17
Yuri da Silva Ventura Faustino-da-Silva, Ricardo Ribeiro Agostinete, André Oliveira Werneck, Santiago Maillane-Vanegas, Kyle Robinson Lynch, Isabella Neto Exupério, Igor Hideki Ito, Romulo Araújo Fernandes
Background: Osteoporosis is considered a public health problem with high worldwide prevalence. One approach to prevention is through the promotion of physical activity, especially exercise, during adolescence. Methods: This study compared bone variables in different body segments in adolescents according to participation in track and field. The study included 34 adolescents (22 boys), of whom 17 were track and field athletes and 17 were control subjects. Bone mineral density (BMD, g/cm2 ) and bone mineral content (BMC, g) were analyzed using dual energy X-ray absorptiometry (total body stratified by body segments)...
February 2018: Journal of Bone Metabolism
https://www.readbyqxmd.com/read/29563884/symptoms-of-anxiety-and-depression-in-young-athletes-using-the-hospital-anxiety-and-depression-scale
#18
Stephanie Weber, Christian Puta, Melanie Lesinski, Brunhild Gabriel, Thomas Steidten, Karl-Jürgen Bär, Marco Herbsleb, Urs Granacher, Holger H W Gabriel
Elite young athletes have to cope with multiple psychological demands such as training volume, mental and physical fatigue, spatial separation of family and friends or time management problems may lead to reduced mental and physical recovery. While normative data regarding symptoms of anxiety and depression for the general population is available (Hinz and Brähler, 2011), hardly any information exists for adolescents in general and young athletes in particular. Therefore, the aim of this study was to assess overall symptoms of anxiety and depression in young athletes as well as possible sex differences...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29559027/cardiac-deformation-parameters-and-rotational-mechanics-by-cardiac-magnetic-resonance-feature-tracking-in-pre-adolescent-male-soccer-players
#19
Łukasz A Małek, Marzena Barczuk-Falęcka, Michał Brzewski
The purpose of the study was to analyse whether prolonged and regular physical training in children leads to changes in myocardial systolic deformation and rotational mechanics. For that purpose, cardiac MRI feature tracking was performed retrospectively in 35 pre-adolescent male soccer players and 20 matched controls. There were no changes in global strain, but left ventricular twist and apical rotation were greater in soccer players, which adds to the features of paediatric athlete's heart.
March 21, 2018: Cardiology in the Young
https://www.readbyqxmd.com/read/29558844/perfectionistic-strivings-motivation-and-engagement-in-among-sport-specific-activities-adolescent-team-athletes
#20
Kristi Vink, Lennart Raudsepp
The present study sought to extend existing literature by examining the longitudinal directional relationships between perfectionistic strivings, autonomous motivation, and engagement in sport-specific activities among youth athletes in three team sports. Participants were 172 team sports athletes (mean age = 15.2 years, SD = 0.5; males = 94, females = 78) who completed measures of perfectionistic strivings and autonomous motivation at the start and end of a competitive season. Players also completed a training diary during the season...
January 1, 2018: Perceptual and Motor Skills
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