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Relative Age effect in sports

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https://www.readbyqxmd.com/read/28350537/comparison-of-structured-and-unstructured-physical-activity-training-on-predicted-vo2max-and-heart-rate-variability-in-adolescents-a-randomized-control-trial
#1
Vivek Kumar Sharma, Senthil Kumar Subramanian, Krishnakumar Radhakrishnan, Rajathi Rajendran, Balasubramanian Sulur Ravindran, Vinayathan Arunachalam
BACKGROUND: Physical inactivity contributes to many health issues. The WHO-recommended physical activity for adolescents encompasses aerobic, resistance, and bone strengthening exercises aimed at achieving health-related physical fitness. Heart rate variability (HRV) and maximal aerobic capacity (VO2max) are considered as noninvasive measures of cardiovascular health. The objective of this study is to compare the effect of structured and unstructured physical training on maximal aerobic capacity and HRV among adolescents...
March 28, 2017: Journal of Basic and Clinical Physiology and Pharmacology
https://www.readbyqxmd.com/read/28338445/socioeconomic-status-and-outcomes-after-sport-related-concussion-a-preliminary-investigation
#2
Scott L Zuckerman, Brian Holt Zalneraitis, Douglas J Totten, Kolin E Rubel, Andrew W Kuhn, Aaron M Yengo-Kahn, Christopher M Bonfield, Allen K Sills, Gary S Solomon
OBJECTIVE A significant proportion of patients experience long-term symptoms after sport-related concussion (SRC), and several factors have been associated with this protracted recovery. Limited data exist on the role of socioeconomic status (SES) on SRC outcomes. The objective in this study was to conduct a preliminary investigation to determine the effect of SES on outcomes after SRC in student-athletes treated at a regional sports concussion center. METHODS A retrospective cohort study of 282 middle school, high school, and collegiate student-athletes was conducted...
March 24, 2017: Journal of Neurosurgery. Pediatrics
https://www.readbyqxmd.com/read/28326044/geographical-variations-in-the-interaction-of-relative-age-effects-in-youth-and-adult-elite-soccer
#3
Christina Steingröver, Nick Wattie, Joseph Baker, Werner F Helsen, Jörg Schorer
Selection biases based on the use of cut-off dates and the timing of athletes' birthdates have been termed relative age effects. These effects have been shown to differentially affect individuals involved in sport. For example, young male soccer players born early in their age group are overrepresented in elite teams while studies in adult soccer indicated potential carry-over effects from talent development systems. This two-study approach focuses on the processes within multi-year age groups in youth and adult elite soccer and on the role of players' age position within the age band with regard to players' birth year and birth month...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28325087/physical-activity-correlates-in-people-living-with-hiv-aids-a-systematic-review-of-45-studies
#4
Davy Vancampfort, James Mugisha, Justin Richards, Marc De Hert, Michel Probst, Brendon Stubbs
PURPOSE: Understanding barriers and facilitators of physical activity participation in persons living with HIV/AIDS is an essential first step in order to devise effective interventions. The present review provides a systematic quantitative review of the physical activity correlates in people with HIV/AIDS. METHODS: Major electronic databases were searched till August 2016. Keywords included "physical activity" or "exercise" or "sports" and "AIDS" or "HIV". RESULTS: Out of 55 correlates from 45 studies (N = 13,167; mean age range = 30...
March 22, 2017: Disability and Rehabilitation
https://www.readbyqxmd.com/read/28316257/acute-kinematic-and-kinetic-adaptations-to-wearable-resistance-during-vertical-jumping
#5
Paul Macadam, Kim D Simperingham, John B Cronin, Grace Couture, Chloe Evison
One variation of vertical jump (VJ) training is resisted or weighted jump training, where wearable resistance (WR) enables jumping to be overloaded in a movement specific manner. A two-way analysis of variance with Bonferroni post hoc contrasts was used to determine the acute changes in VJ performance with differing load magnitudes and load placements. Kinematic and kinetic data were quantified using a force plate and contact mat. Twenty sport active subjects (age: 27.8 ± 3.8 years; body mass (BM): 70...
March 19, 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/28301451/traumatic-brain-injury-related-emergency-department-visits-hospitalizations-and-deaths-united-states-2007-and-2013
#6
Christopher A Taylor, Jeneita M Bell, Matthew J Breiding, Likang Xu
PROBLEM/CONDITION: Traumatic brain injury (TBI) has short- and long-term adverse clinical outcomes, including death and disability. TBI can be caused by a number of principal mechanisms, including motor-vehicle crashes, falls, and assaults. This report describes the estimated incidence of TBI-related emergency department (ED) visits, hospitalizations, and deaths during 2013 and makes comparisons to similar estimates from 2007. REPORTING PERIOD: 2007 and 2013. DESCRIPTION OF SYSTEM: State-based administrative health care data were used to calculate estimates of TBI-related ED visits and hospitalizations by principal mechanism of injury, age group, sex, and injury intent...
March 17, 2017: MMWR. Surveillance Summaries: Morbidity and Mortality Weekly Report. Surveillance Summaries
https://www.readbyqxmd.com/read/28276913/postural-stability-clicker-reaction-time-and-bow-draw-force-predict-performance-in-elite-recurve-archery
#7
Wayne Spratford, Rhiannon Campbell
Recurve archery is an Olympic sport that requires extreme precision, upper body strength and endurance. The purpose of this research was to quantify how postural stability variables both pre- and post-arrow release, draw force, flight time, arrow length and clicker reaction time, collectively, impacted on the performance or scoring outcomes in elite recurve archery athletes. Thirty-nine elite-level recurve archers (23 male and 16 female; mean age = 24.7 ± 7.3 years) from four different countries volunteered to participate in this study prior to competing at a World Cup event...
February 14, 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/28268276/preliminary-results-of-residual-deficits-observed-in-athletes-with-concussion-history-combined-eeg-and-cognitive-study
#8
Tamanna T K Munia, Jeffrey L Gendreau, Ajay K Verma, Benjamin D Johnson, Mark Romanick, Kouhyar Tavakolian, Reza Fazel-Rezai
Assessment, treatment, and management of sport-related concussions are a widely recognized public health issue. Although several neuropsychological and motor assessment tools have been developed and implemented for sports teams at various levels and ages, the sensitivity of these tests has yet to be validated with more objective measures to make return-to-play (RTP) decisions more confidently. The present study sought to analyze the residual effect of concussions on a sample of adolescent athletes who sustained one or more previous concussions compared to those who had no concussion history...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28257620/the-effectiveness-of-combined-exercise-interventions-for-preventing-postmenopausal-bone-loss-a-systematic-review-and-meta-analysis
#9
Renqing Zhao, Mengyi Zhang, Qi Zhang
Study Design Systematic review and meta-analysis. Background It remains unclear whether exercise combining different types of physical activities (combined exercise interventions) would effectively preserve postmenopausal women's bone mineral density (BMD) at different sites. Objectives To examine the impact of combined exercise interventions on lumbar spine, femoral neck, total hip and total body BMD in postmenopausal women. Methods An electronic database search was conducted in PubMed, EMBASE, SPORTDiscus, and Web of Science up to Jan1, 2016...
March 3, 2017: Journal of Orthopaedic and Sports Physical Therapy
https://www.readbyqxmd.com/read/28252195/is-positive-thinking-in-anticipation-of-a-performance-situation-better-than-distraction-an-experimental-study-in-preadolescents
#10
Stephanos P Vassilopoulos, Andreas Brouzos, Haralambos Tsorbatzoudis, Olga Tziouma
The current study compares the effects of experimentally induced positive anticipatory thinking and distraction in preadolescents aged 12-13. Eighty-seven participants were instructed to either engage in positive anticipatory thoughts or perform a distraction task while preparing to perform a sporting activity in front of their peers. Results revealed that trait social anxiety was associated with more negative estimates of sport performance and catastrophic thoughts relating to the impending sport activity...
April 2017: Scandinavian Journal of Psychology
https://www.readbyqxmd.com/read/28247331/exercise-based-interventions-for-injury-prevention-in-tackle-collision-ball-sports-a-systematic-review
#11
REVIEW
Nicola Sewry, Evert Verhagen, Mike Lambert, Willem van Mechelen, Wayne Viljoen, Clint Readhead, James Brown
BACKGROUND: The injury burden in collision sports is relatively high compared to other team sports. Therefore, participants in these sports would benefit by having effective injury prevention programs. Exercise-based interventions have successfully reduced injuries in soccer, but evidence on exercise-based interventions in tackle collision sports is limited. OBJECTIVE: The objective of this review is to systematically examine the evidence of exercise-based intervention programs reducing injuries in tackle collision sports...
February 28, 2017: Sports Medicine
https://www.readbyqxmd.com/read/28226433/preliminary-results-of-residual-deficits-observed-in-athletes-with-concussion-history-combined-eeg-and-cognitive-study
#12
Tamanna T K Munia, Jeffrey L Gendreau, Ajay K Verma, Benjamin D Johnson, Mark Romanick, Kouhyar Tavakolian, Reza Fazel-Rezai, Tamanna T K Munia, Jeffrey L Gendreau, Ajay K Verma, Benjamin D Johnson, Mark Romanick, Kouhyar Tavakolian, Reza Fazel-Rezai, Reza Fazel-Rezai, Jeffrey L Gendreau, Benjamin D Johnson, Tamanna T K Munia, Ajay K Verma, Kouhyar Tavakolian, Mark Romanick
Assessment, treatment, and management of sport-related concussions are a widely recognized public health issue. Although several neuropsychological and motor assessment tools have been developed and implemented for sports teams at various levels and ages, the sensitivity of these tests has yet to be validated with more objective measures to make return-to-play (RTP) decisions more confidently. The present study sought to analyze the residual effect of concussions on a sample of adolescent athletes who sustained one or more previous concussions compared to those who had no concussion history...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28222582/anthropometric-and-performance-measures-to-study-talent-detection-in-youth-volleyball
#13
Giovanni Melchiorri, Valerio Viero, Tamara Triossi, Giuseppe Annino, Elvira Padua, Virginia Tancredi
BACKGROUND: The aim of this work was to study anthropometric and performance measurements in 60 young male volleyball players (YV) and 60 youth not active in the sport (YNA) to assess which of these would be more useful to study the characteristics of potential performers. METHODS: Eight measures to assess anthropometric characteristics, six performance measures and two tests for joint mobility were used. Also relative age and level of maturation were assessed. RESULTS: The anthropometric variables, relative age and level of maturation measured did not show statistically significant differences between groups...
February 21, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28211600/feasibility-of-early-physical-therapy-for-dizziness-after-a-sports-related-concussion-a-randomized-clinical-trial
#14
J C Reneker, A Hassen, R S Phillips, M C Moughiman, M Donaldson, J Moughiman
The purpose of this study was to (a) assess the feasibility of recruitment/retention of participants, protocol/resource management, and participant safety, and (b) estimate the size of the effect between the experimental and control groups. This was a feasibility study conducted as a prospective pilot double-blind randomized clinical trial. Subjects aged 10-23 years old with acute concussion and dizziness were enrolled from sports medicine centers. Forty-one participants were randomized into treatment and were seen for physical therapy beginning at 10 days post-concussion...
February 17, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28210177/orbital-reconstruction-with-a-partially-absorbable-mesh-monofilament-polypropylene-fibre-and-monofilament-poliglecaprone-25-our-experience-with-34-patients
#15
Moustafa Alkhalil, J Joshi Otero
PURPOSE: To evaluate the effectiveness and complications related to the use of a partially absorbable mesh for the reconstruction of orbital floor fractures. This is a retrospective review of 34 consecutive patients who suffered orbital trauma from August 2007 to March 2013 treated with a partially absorbable mesh for orbital reconstruction. Data collected included gender, age, nationality, cause of injury, date of admission, date of surgery, date of discharge, type of fracture, signs and symptoms such as diplopia, enophthalmos, and sensory disturbance related to the infraorbital nerve, complications before and after surgery, and follow-ups at 1 week, 1 month, 6 months, and after 1 year...
July 2016: Saudi Journal of Ophthalmology: Official Journal of the Saudi Ophthalmological Society
https://www.readbyqxmd.com/read/28165873/overuse-physeal-injuries-in-youth-athletes
#16
Amanda Arnold, Charles A Thigpen, Paul F Beattie, Michael J Kissenberth, Ellen Shanley
CONTEXT: Despite rising awareness of the risks associated with sports participation, overuse injuries continue to increase in youth athlete populations. Physeal injuries are one type of overuse injury exclusive to pediatric populations that are often sustained during athletic practice or competition. Overuse physeal injuries are, in theory, preventable; however, little consensus has been reached surrounding the risk factors, prevention, and treatment strategies. OBJECTIVE: This systematic review summarizes the best available evidence concerning overuse physeal injuries in youth and adolescent athletes...
March 2017: Sports Health
https://www.readbyqxmd.com/read/28163924/overweight-and-obesity-in-children-aged-3-13%C3%A2-years-in-urban-cameroon-a-cross-sectional-study-of-prevalence-and-association-with-socio-economic-status
#17
Simeon-Pierre Choukem, Josiane Kamdeu-Chedeu, Sam D Leary, Yannick Mboue-Djieka, Daniel N Nebongo, Christoph Akazong, Yacouba N Mapoure, Julian P Hamilton-Shield, Jean-François Gautier, Jean Claude Mbanya
BACKGROUND: Childhood overweight/obesity is increasing rapidly in developing countries. There is a need to provide more evidence on its burden in sub-Saharan Africa, and to identify associated factors in order to set preventive measures. We aimed to determine the prevalence of overweight/obesity and assess its association with the socioeconomic status in nursery and primary school children in urban Cameroon. METHODS: In this cross-sectional study, we included by multi-staged cluster random sampling 1343 children from high (HSES, n = 673) and low (LSES, n = 670) socioeconomic status schools in Douala...
2017: BMC Obesity
https://www.readbyqxmd.com/read/28145740/adaptive-alterations-in-shoulder-range-of-motion-and-strength-in-young-tennis-players
#18
Benoit Gillet, Mickaël Begon, Violaine Sevrez, Christian Berger-Vachon, Isabelle Rogowski
CONTEXT: Playing tennis requires unilateral and intensive movement of the upper limb, which may lead to functional adaptations of the shoulder and an increased injury risk. Identifying which athletes will be future elite tennis players starts at 5 to 6 years of age. Therefore, highly skilled players practice intensively in their childhood. However, whether these functional changes occur during the prepubertal years has not been established. OBJECTIVES: To assess changes in glenohumeral-joint-rotation range of motion and strength of the shoulder-complex muscles in prepubertal elite tennis players...
February 2017: Journal of Athletic Training
https://www.readbyqxmd.com/read/28144978/effect-of-team-sports-and-resistance-training-on-physical-function-%C3%A2-quality-of-life-and-motivation-in-older-adults
#19
M T Pedersen, J Vorup, A Nistrup, J M Wikman, J M Alstrøm, P S Melcher, G U Pfister, J Bangsbo
The aim of this study was to investigate the effect of team sports and resistance training on physical function, psychological health, quality of life, and motivation in older untrained adults. Twenty-five untrained men and forty-seven untrained women aged 80 (range: 67-93) years were recruited. Fifty-one were assigned to a training group (TRG) of which twenty-five performed team training (TG) and twenty-six resistance training (RG). The remaining twenty-one were allocated to a control group (CG). TRG trained for 1 hour twice a week for 12 weeks...
February 1, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/28142365/hip-and-knee-osteoarthritis-affects-younger-people-too
#20
Ilana N Ackerman, Joanne L Kemp, Kay M Crossley, Adam G Culvenor, Rana S Hinman
Synopsis Although osteoarthritis (OA) has traditionally been considered a disease of older age, hip and knee OA can and does affect younger adults, with a profound impact on psychosocial well-being and work capacity. Obesity and a history of traumatic knee injury (eg, anterior cruciate ligament rupture and/or meniscal tear) are key risk factors for the accelerated development of knee OA, while structural hip deformities (including those contributing to femoroacetabular impingement syndrome) are strong predictors of early-onset hip OA...
February 2017: Journal of Orthopaedic and Sports Physical Therapy
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