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Relative Age effect in sports

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https://www.readbyqxmd.com/read/29332225/over-90%C3%A2-of-children-and-adolescents-return-to-sport-after-anterior-cruciate-ligament-reconstruction-a-systematic-review-and-meta-analysis
#1
REVIEW
Jeffrey Kay, Muzammil Memon, Robert G Marx, Devin Peterson, Nicole Simunovic, Olufemi R Ayeni
PURPOSE: To evaluate the rate at which children and adolescent athletes return to sporting activities after anterior cruciate ligament (ACL) reconstruction. METHODS: Three databases, PubMed, MEDLINE, and EMBASE, were searched from database inception until September 9, 2017 by two reviewers independently and in duplicate. The inclusion criteria were English language studies that reported return to sport outcomes. Book chapters, conference papers, review articles, and technical reports were excluded...
January 13, 2018: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29322617/preview-prevention-of-diabetes-through-lifestyle-intervention-in-a-multicentre-study-in-europe-in-children-10-17y-design-methods-and-baseline-results
#2
Elke Dorenbos, Mathijs Drummen, Jesse Rijks, Tanja Adam, Pauline Stouthart, J Alfredo Martínez, Santiago Navas-Carretero, Gareth Stratton, Nils Swindell, Mikael Fogelholm, Anne Raben, Margriet Westerterp-Plantenga, Anita Vreugdenhil
Insulin resistance (IR) in adolescence is associated with T2DM. The PREVIEW study assesses the effectiveness of a high-protein, low-glycaemic index diet and moderate-protein, moderate-glycaemic index diet to decrease IR in insulin resistant children with overweight/obesity. Inclusion criteria were age 10-17y, HOMA-IR≥2.0 and overweight/obesity. In 126 children (13.6±2.2y, BMI z-score 3.04±0.66, HOMA-IR 3.48±2.28) anthropometrics, fat mass percentage (FM%), metabolic parameters, physical activity, food intake and sleep were measured...
January 11, 2018: Diabetes, Obesity & Metabolism
https://www.readbyqxmd.com/read/29299878/talent-identification-and-development-in-male-football-a-systematic-review
#3
REVIEW
Hugo Sarmento, M Teresa Anguera, Antonino Pereira, Duarte Araújo
BACKGROUND: Expertise has been extensively studied in several sports over recent years. The specificities of how excellence is achieved in Association Football, a sport practiced worldwide, are being repeatedly investigated by many researchers through a variety of approaches and scientific disciplines. OBJECTIVE: The aim of this review was to identify and synthesise the most significant literature addressing talent identification and development in football. We identified the most frequently researched topics and characterised their methodologies...
January 3, 2018: Sports Medicine
https://www.readbyqxmd.com/read/29286534/fitness-training-for-cardiorespiratory-conditioning-after-traumatic-brain-injury
#4
REVIEW
Leanne Hassett, Anne M Moseley, Alison R Harmer
BACKGROUND: Reduced cardiorespiratory fitness (cardiorespiratory deconditioning) is a common consequence of traumatic brain injury (TBI). Fitness training may be implemented to address this impairment. OBJECTIVES: The primary objective of this updated review was to evaluate whether fitness training improves cardiorespiratory fitness in people who have sustained a TBI. The secondary objectives were to evaluate whether fitness training improves body function and structure (physical and cognitive impairments, psychological responses resulting from the injury), activity limitations and participation restrictions in people who have sustained a TBI as well as to evaluate its safety, acceptance, feasibility and suitability...
December 29, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/29282262/brain-health-and-healthy-ageing-in-retired-rugby-union-players-the-brain-study-study-protocol-for-an-observational-study-in-the-uk
#5
Valentina Gallo, Damien McElvenny, Catherine Hobbs, Donna Davoren, Huw Morris, Sebastian Crutch, Henrik Zetterberg, Nick C Fox, Simon Kemp, Matthew Cross, Nigel K Arden, Madeleine A M Davies, Andrea Malaspina, Neil Pearce
INTRODUCTION: Relatively little is known about the long-term health of former elite rugby players, or former sportspeople more generally. As well as the potential benefits of being former elite sportspersons, there may be potential health risks from exposures occurring during an individual's playing career, as well as following retirement. Each contact sport has vastly different playing dynamics, therefore exposing its players to different types of potential traumas. Current evidence suggests that these are not necessarily comparable in terms of pathophysiology, and their potential long-term adverse effects might also differ...
December 26, 2017: BMJ Open
https://www.readbyqxmd.com/read/29276716/lived-experiences-of-adolescent-athletes-following-sport-related-concussion
#6
Tamara C Valovich McLeod, Alyssa J Wagner, Cailee E Welch Bacon
Background: Previous studies have identified the effect of sport-related concussion on health-related quality of life through the use of patient-reported outcome measures. However, there has been little research exploring the underlying mechanisms that influence these perceptions of health-related quality of life among adolescent athletes who have sustained a sport-related concussion. Purpose: To explore the psychosocial aspects of concussion among adolescent athletes...
December 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/29276206/utility-of-stir-mri-in-detecting-the-pain-generator-in-asymmetric-bilateral-pars-fracture-a-report-of-5-cases
#7
Kazuta Yamashita, Toshinori Sakai, Yoichiro Takata, Fumio Hayashi, Fumitake Tezuka, Masatoshi Morimoto, Yutaka Kinoshita, Akihiro Nagamachi, Takashi Chikawa, Hiroshi Yonezu, Kosaku Higashino, Tadanori Sakamaki, Koichi Sairyo
Lumbar spondylolysis usually occurs as a stress fracture in the pars interarticularis of the vertebra. It is a prevalent sports-related disorder and a common cause of low back pain. We encountered five athletes (4 males, 1 female) with severe low back pain. Mean age was 14.5 years. All five patients were found to have bilateral pars fracture. In all cases, staging based on the findings from computed tomography scan of the right and left pars fracture was different. On short tau inversion recovery magnetic resonance imaging (STIR-MRI) of the comparatively newer more recently injured side, high signal intensity changes were obvious and dominant at the intra- and extraosseous area, which would indicate tissue edema and/or bleeding...
December 25, 2017: Neurologia Medico-chirurgica
https://www.readbyqxmd.com/read/29246592/risk-factors-associated-with-baseline-king-devick-performance
#8
R Moran, T Covassin
OBJECTIVE: This study examined the effect of baseline risk factors on the King-Devick (K-D) test in youth athletes, including of age, sex, and history of concussion. METHODS: A total of 422 youth football and soccer athletes between the ages of 8 and 14 completed a baseline K-D test prior to the start of their respective seasons. Participant age, sex, and history of concussion were analyzed for K-D performance (i.e., errors and baseline time). A series of Mann-Whitney U tests were conducted to determine the effects of risk factors on performance...
December 15, 2017: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/29244841/individual-preferences-for-physical-exercise-as-secondary-prevention-for-non-specific-low-back-pain-a-discrete-choice-experiment
#9
Emmanuel Aboagye, Jan Hagberg, Iben Axén, Lydia Kwak, Malin Lohela-Karlsson, Eva Skillgate, Gunilla Dahlgren, Irene Jensen
BACKGROUND: Exercise is effective in improving non-specific low back pain (LBP). Certain components of physical exercise, such as the type, intensity and frequency of exercise, are likely to influence participation among working adults with non-specific LBP, but the value and relative importance of these components remain unknown. The study's aim was to examine such specific components and their influence on individual preferences for exercise for secondary prevention of non-specific LBP among working adults...
2017: PloS One
https://www.readbyqxmd.com/read/29244525/20-year-outcomes-of-anterior-cruciate-ligament-reconstruction-with-hamstring-tendon-autograft-the-catastrophic-effect-of-age-and-posterior-tibial-slope
#10
Lucy J Salmon, Emma Heath, Hawar Akrawi, Justin P Roe, James Linklater, Leo A Pinczewski
BACKGROUND: No well-controlled studies have compared the long-term outcome of anterior cruciate ligament (ACL) reconstruction with hamstring tendon autograft between adolescents and adults. Increased posterior tibial slopes (PTSs) have been reported in the ACL-injured versus controls, but the effect of PTS on the outcome after reconstruction is relatively unexplored. PURPOSE: To compare the prospective longitudinal outcome of "isolated" ACL ruptures treated with anatomic endoscopic ACL reconstruction using hamstring tendon autograft over 20 years in adolescent and adult cohorts and to examine factors for repeat ACL injury...
December 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29234553/gait-deficits-under-dual-task-conditions-in-the-concussed-adolescent-and-young-athlete-population-a-systematic-review
#11
Larisa Grants, Bailey Powell, Cody Gessel, Faith Hiser, Amy Hassen
Background: There are no current sport concussion assessments that capture the effects of dual-task conditions on gait. Multiple studies have evaluated changes, but none have comprehensively examined literature related to the adolescent and young adult population.Purpose: The purpose of this systematic review is to synthesize documented changes in gait under dual-task conditions in adolescents and young adults after sustaining a concussion.Study Design: Systematic Review. Methods: The Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) was consulted to guide this systematic review...
December 2017: International Journal of Sports Physical Therapy
https://www.readbyqxmd.com/read/29232481/tracking-of-areal-bone-mineral-density-from-age-eight-to-young-adulthood-and-factors-associated-with-deviation-from-tracking-a-17-yr-prospective-cohort-study
#12
Yi Yang, Feitong Wu, Tania Winzenberg, Graeme Jones
We have previously shown that bone mineral density (BMD) tracks strongly from age 8 to 16. This study aimed to describe whether this strong tracking continued to age 25 and describe factors associated with deviation from tracking. Ninety-nine participants were followed from age 8 to 25 and 197 participants from age 16 to 25. Outcomes measured were BMD at the spine, hip and total body (by dual-energy X-ray absorptiometry (DXA)). Other factors measured were anthropometrics, inhaled corticosteroids (ICS) use, history of being breastfed, sports participation, fitness (by physical work capacity (PWC170 )), lean mass (LM) and fat mass (FM) (by DXA)...
December 12, 2017: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/29231753/rates-of-insufficiency-and-deficiency-of-vitamin-d-levels-in-elite-professional-male-and-female-skiers-a-chronobiologic-approach
#13
Jacopo Antonino Vitale, Giovanni Lombardi, Luca Cavaleri, Rosa Graziani, Herbert Schoenhuber, Antonio La Torre, Giuseppe Banfi
Vitamin D is essential for the maintenance and promotion of musculoskeletal health, for the functioning of the immune, cardiovascular and reproductive systems, and its main action is to keep calcium and phosphate plasmatic physiological concentrations at intestinal, renal and bony level. Vitamin D affects several parameters related to physical performance too and a particularly high percentage of vitamin D insufficiency and deficiency in professional athletes has been observed. Several variables are able to impair the synthesis of 25(OH)D in athletes, specifically both genetic and environmental factors, but the most probable explanation for the deficient/insufficient vitamin D levels is the insufficient ultraviolet B light (UVB) exposure during winter...
December 12, 2017: Chronobiology International
https://www.readbyqxmd.com/read/29209188/age-related-decline-of-wrist-position-sense-and-its-relationship-to-specific-physical-training
#14
Ann Van de Winckel, Yu-Ting Tseng, Daniel Chantigian, Kaitlyn Lorant, Zinat Zarandi, Jeffrey Buchanan, Thomas A Zeffiro, Mia Larson, Becky Olson-Kellogg, Jürgen Konczak, Manda L Keller-Ross
Perception of limb and body positions is known as proprioception. Sensory feedback, especially from proprioceptive receptors, is essential for motor control. Aging is associated with a decline in position sense at proximal joints, but there is inconclusive evidence of distal joints being equally affected by aging. In addition, there is initial evidence that physical activity attenuates age-related decline in proprioception. Our objectives were, first, to establish wrist proprioceptive acuity in a large group of seniors and compare their perception to young adults, and second, to determine if specific types of training or regular physical activity are associated with preserved wrist proprioception...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/29199550/facilitating-dual-careers-by-improving-resistance-to-chronic-stress-effects-of-an-intervention-programme-for-elite-student-athletes
#15
Jeffrey Sallen, Karen Hemming, Alfred Richartz
The starting point of this contribution is the potential risk to health and performance from the combination of elite sporting careers with the pursuit of education. In European sport science and politics, structural measures to promote dual careers in elite sports have been discussed increasingly of late. In addition to organisational measures, there are calls for educational-psychological intervention programmes supporting the successful management of dual careers at the individual level. This paper presents an appropriate intervention programme and its evaluation: stress-resistance training for elite athletes (SRT-EA)...
December 3, 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/29185624/the-effect-of-adapted-sports-in-quality-of-life-and-biopsychosocial-profile-of-children-and-adolescents-with-cerebral-palsy
#16
Luzanira Correia Feitosa, Sandra Regina Baggio Muzzolon, Danielle Caldas Bufara Rodrigues, Ana Chrystina de Souza Crippa, Marise Bueno Zonta
OBJECTIVE: The participation in sports and recreational activities promotes inclusion and the quality of life (QOL) for people with some type of disability. This study aims to evaluate and describe the effect of adapted sports (AS) on the QOL and biopsychosocial profile of children/adolescents with cerebral palsy (CP). METHODS: Forty-seven children/adolescents with CP were evaluated and referred to AS (soccer and swimming). The QOL was evaluated by the Pediatric Outcome Data Collection Instrument (PODCI) and the biopsychosocial profile by the Behavior Checklist for Children/Adolescents (CBCL)...
October 2017: Revista Paulista de Pediatria: Orgão Oficial da Sociedade de Pediatria de São Paulo
https://www.readbyqxmd.com/read/29184524/a-qualitative-approach-on-motives-and-aspects-of-risks-in-freeriding
#17
Anika Frühauf, Will A S Hardy, Daniel Pfoestl, Franz-Georg Hoellen, Martin Kopp
Recent research has shown that there are multiple motives for participation in high-risk sport; however these results have come from studies that consider a number of different sports. Therefore, the aim of the present study was to better understand the motives and risk-related aspects of freeriding, using a qualitative approach. Semi-structured interviews were conducted with 40 professional and semi-professional freeride skiers and snowboarders. All freeriders were highly experienced, of different age (19-44 years; 27...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/29176479/effect-of-long-term-diving-on-the-morphology-and-growth-of-the-distal-radial-epiphyseal-plate-of-young-divers-a-magnetic-resonance-imaging-study
#18
Cici Zhang, Si Shen, Wen Zhang, Lin Qiu, Qingying Wu, Fei Wang, Sirun Liu
OBJECTIVE: To investigate the effects of long-term diving on the morphology and growth of the distal radial epiphyseal plate in young divers. STUDY DESIGN: Cohort study. SETTING: Guangzhou Sport University. PARTICIPANTS: Thirty-eight professional divers, aged 10 to 17 years, and 25 age-matched volunteers. INTERVENTIONS: Each subject received a physical examination at the beginning of the study and underwent bilateral magnetic resonance imaging of the wrist...
November 13, 2017: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
https://www.readbyqxmd.com/read/29169096/neuromuscular-compensatory-strategies-at-the-trunk-and-lower-limb-are-not-resolved-following-an-acl-reconstruction
#19
Grant Boggess, Kristin Morgan, Darren Johnson, Mary Lloyd Ireland, Jeffrey A Reinbolt, Brian Noehren
BACKGROUND: Following anterior cruciate ligament reconstruction (ACLR), patients present with greater trunk ipsilateral lean, which may affect knee kinetics and increase re-injury risk. However, there has been little research into neuromuscular factors controlling the trunk and their relation to the knee between healthy and ACLR subjects. This is critical to establish in order to develop more directed and effective interventions. HYPOTHESIS: As compared to healthy control subjects, ACLR subjects will demonstrate increased erector spinae and rectus abdominis co-contraction, greater rectus abdominis force and greater hamstring force that is correlated to increased forward trunk lean...
November 13, 2017: Gait & Posture
https://www.readbyqxmd.com/read/29164266/nationwide-study-highlights-a-second-peak-in-acl-tears-for-women-in-their-early-forties
#20
Micah Nicholls, Thor Aspelund, Thorvaldur Ingvarsson, Kristin Briem
PURPOSE: Anterior cruciate ligament (ACL) rupture continues to be a focus of research on knee injuries. Despite this, data on the total number of ruptures on a national basis including both reconstructed (ACLR) and non-reconstructed injuries are limited. The purpose of this study was to describe the national incidence of MRI diagnosed ACL ruptures in Iceland and its subsequent rate of operation with regard to sex and age. METHODS: All MRI knee reports taken in Iceland between 2006 and 2011 were gathered to identify ACL ruptures...
November 21, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
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