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https://www.readbyqxmd.com/read/29446708/does-local-dynamic-stability-of-kayak-paddling-technique-affect-the-sports-performance-a-pilot-study
#1
Daniel Hamacher, Tobias Krebs, Guido Meyer, Astrid Zech
During competition, kayak athletes must optimally adapt to environmental factors (e.g. wind, waves) to achieve peak performance. However, the ability to adapt to such perturbations has never been assessed in kayak paddling. Therefore, the aim of the current study was to evaluate the local dynamic stability in sports technique of youth sprint kayak athletes. In a cross-sectional study, 14 healthy male athletes were recruited from an elite youth sprint kayak squad. During an incremental kayak ergometer test, mean power, heart rates and local dynamic technique stability of hands, arms, trunk and paddle were registered and the association with the athletes 2000 m free-water times were estimated using mixed models...
February 15, 2018: European Journal of Sport Science
https://www.readbyqxmd.com/read/29431592/in-season-changes-in-ventricular-morphology-and-systolic-function-in-adolescent-female-athletes
#2
Andrew M Watson, Carol Coutinho, Kristin Haraldsdottir, Stacey Brickson, Warren Dunn, Marlowe Eldridge
PURPOSE: To evaluate the influence of physical maturity on the changes in ventricular morphology and function with sport training in female youth athletes. METHODS: Thirty-two female athletes (age 13-18 years) underwent height and weight measurement and 2-D echocardiographic evaluation immediately prior to, and following, a 20-week soccer season. Pre- and post-season left ventricular end-diastolic diameter (LVEDD), end-diastolic volume (LVEDV), ejection fraction (LVEF), stroke volume (LVSV), mass (LVM), and posterior wall thickness (LVPWT), right ventricular end-diastolic diameter (RVEDD), end-diastolic area (RVEDA), and fractional area change (RVFAC), and interventricular septal thickness (IVST) were compared...
February 12, 2018: European Journal of Sport Science
https://www.readbyqxmd.com/read/29431168/king-devick-test-identifies-real-time-concussion-and-asymptomatic-concussion-in-youth-athletes
#3
Priya S Dhawan, Danielle Leong, Lisa Tapsell, Amaal J Starling, Steven L Galetta, Laura J Balcer, Trenton L Overall, Jennifer S Adler, Rashmi B Halker-Singh, Bert B Vargas, David Dodick
Background: Sports concussion has an annual incidence of approximately 3.8 million. Over half go unreported and a substantial number may be asymptomatic. A rapid, cost-effective, and reliable tool that facilitates diagnosis of concussion is needed. The King-Devick (K-D) test is a vision-based tool of rapid number naming for assessment of concussion. In this study, we evaluated the utility of the K-D test in real time for identification of symptomatic concussion in youth athletes and to determine if similar impairment (subclinical concussion) exists in youth athletes without an obvious head injury or symptoms...
December 2017: Neurology. Clinical Practice
https://www.readbyqxmd.com/read/29429044/timing-not-magnitude-of-force-may-explain-sex-dependent-risk-of-acl-injury
#4
Haraldur B Sigurðsson, Þórarinn Sveinsson, Kristín Briem
PURPOSE: The anterior cruciate ligament is loaded through valgus moment, vertical ground reaction force, and internal rotation moment. The aim of this study was to compare the timing of force peaks during early stance between youth girls and boys. METHODS: One-hundred and twenty-nine team sport athletes aged 9-12 completed a total of 2540 cutting maneuvers captured with an 8-camera motion capture system. Timing of early force peaks was analyzed within 100 ms after ground contact...
February 10, 2018: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29425698/assessment-of-sleep-quantity-and-sleep-disturbances-during-recovery-from-sports-related-concussion-in-youth-athletes
#5
Donna L Murdaugh, Kim E Ono, Andrew Reisner, Thomas G Burns
OBJECTIVE: To determine the relationship between sleep quantity and sleep disturbances on symptoms and neurocognitive ability at the acute phase (<7 days) and post-sports-related concussion (SRC; >21 days). DESIGN: Prospective inception cohort study SETTING: General community setting of regional middle and high schools. PARTICIPANTS: Sample included 528 youth athletes with SRC and 443 controls ages 10-18. MAIN OUTCOME MEASURES: Athletes completed the Immediate Post-Concussive Assessment and Cognitive Testing (ImPACT) battery...
February 6, 2018: Archives of Physical Medicine and Rehabilitation
https://www.readbyqxmd.com/read/29424276/growth-maturation-and-exercise-during-youth-the-year-that-was-2017
#6
Jaak Jürimäe
For "The Year That Was 2017," I have selected 3 papers in the area of growth, maturation, and exercise during youth. The first paper has been chosen because it provides for the first time the relative age, maturation, and anthropometric biases on position allocation in elite youth soccer players participating in talent identification programs in professional soccer league. Specific anthropometrical attributes characterized playing positions with a bias toward these athletes who are comparatively tall and heavy for their age already in younger ages, whereas position-specific physical attributes do not become apparent until the later stages of talent development...
February 9, 2018: Pediatric Exercise Science
https://www.readbyqxmd.com/read/29424273/neuromuscular-physiology-exercise-and-training-during-youth-the-year-that-was-2017
#7
David G Behm
The pressure for children to excel and succeed in sport continues to mount. Although resistance training for youth was in disfavor by many organizations even into the early 21st century, children's training programs are more closely resembling the volume and intensity of adult programs. The physiological maturation of adolescent youth may impact their response to advanced training programs. Furthermore, the pressure to specialize in specific sports rather than engage in a variety of sporting activities may affect not only training responses but also injury incidence...
February 9, 2018: Pediatric Exercise Science
https://www.readbyqxmd.com/read/29422038/physical-activity-patterns-across-time-segmented-youth-sport-flag-football-practice
#8
Chelsey R Schlechter, Justin M Guagliano, Richard R Rosenkranz, George A Milliken, David A Dzewaltowski
BACKGROUND: Youth sport (YS) reaches a large number of children world-wide and contributes substantially to children's daily physical activity (PA), yet less than half of YS time has been shown to be spent in moderate-to-vigorous physical activity (MVPA). Physical activity during practice is likely to vary depending on practice structure that changes across YS time, therefore the purpose of this study was 1) to describe the type and frequency of segments of time, defined by contextual characteristics of practice structure, during YS practices and 2) determine the influence of these segments on PA...
February 8, 2018: BMC Public Health
https://www.readbyqxmd.com/read/29420685/gender-differences-in-symptom-reporting-on-baseline-sport-concussion-testing-across-the-youth-age-span
#9
Rosemarie Scolaro Moser, Lauren Olek, Philip Schatz
Background: Little is known regarding gender differences in concussion symptom reporting developmentally across the age span, specifically in pre-adolescent athletes. The present study asks: Do boys and girls differ in symptom reporting across the pre-adolescent to post-adolescent age span? Method: This retrospective study utilized baseline assessments from 11,695 10-22 year-old athletes assigned to 3 independent groups: Pre-adolescent 10-12 year olds (n = 1,367; 12%), Adolescent 13-17 year olds (n = 2,974; 25%), and Late Adolescent 18-22 year olds (n = 7,354; 63%)...
February 6, 2018: Archives of Clinical Neuropsychology: the Official Journal of the National Academy of Neuropsychologists
https://www.readbyqxmd.com/read/29417870/elite-youth-sports-the-year-that-was-2017
#10
Craig A Williams
In 2017, considerable attention has been paid by researchers on early sports specialization for youth athletes. Issues related to injury, burnout, and talent development to name a few have been debated, particularly when contrasted against other opposing youth development approaches, such as a multisport approach. The increasing professionalization of young athletes, a particular concern of this author, is coupled with the ensuing physical and mental pressures on these youngsters, as highlighted by the 2 highlighted publications in this commentary...
February 8, 2018: Pediatric Exercise Science
https://www.readbyqxmd.com/read/29409340/exercise-addiction-in-adolescents-and-emerging-adults-validation-of-a-youth-version-of-the-exercise-addiction-inventory
#11
Mia Beck Lichtenstein, Mark D Griffiths, Simone Daugaard Hemmingsen, René Klinkby Støving
Background Behavioral addictions often onset in adolescence and increase the risk of psychological and social problems later in life. The core symptoms of addiction are tolerance, withdrawal symptoms, lack of control, and compulsive occupation with the behavior. Psychometrically validated tools are required for detection and early intervention. Adolescent screening instruments exist for several behavioral addictions including gambling and video gaming addiction but not for exercise addiction. Given recent empirical and clinical evidence that a minority of teenagers appear to be experiencing exercise addiction, a psychometrically robust screening instrument is required...
February 7, 2018: Journal of Behavioral Addictions
https://www.readbyqxmd.com/read/29409077/ankle-and-foot-injuries-in-the-young-athlete
#12
Nancy A Chauvin, Camilo Jaimes, Asef Khwaja
Injuries to the ankle and foot are common in the young athlete, especially with increasing participation and high levels of competitiveness in youth sports programs. Knowledge of the normal development of the foot and ankle is crucial to understand age-specific injury patterns because acute or chronic/repetitive stress to the developing skeleton results in injuries that differ from those seen in adults. Congenital abnormalities may also predispose children to increased risk of injury and pain. Radiologists must be aware of these distinctions to diagnose and classify injuries correctly for optimum treatment...
February 2018: Seminars in Musculoskeletal Radiology
https://www.readbyqxmd.com/read/29405808/functional-performance-measures-used-for-return-to-sport-criteria-in-youth-following-lower-extremity-injury
#13
Christie Powell, Jody Jensen, Samantha Johnson
As sport participation increases globally, so will the injury-related risks. The process used to determine return-to-sport, following injury, is vital to future sport participation and injury prevention. Early specialization along with poor management of sport participation causes an increase in injury risk and potential long-term health consequences for youth athletes. Previous injury is a common intrinsic risk factor for new injuries. Identifying functional performance deficits, defined by return-to-sport criteria, minimizes these risk factors and provides athletes guidelines to return safely to sport...
February 6, 2018: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/29405460/one-explanation-to-rule-them-all-identifying-sub-groups-of-non-drinking-swedish-ninth-graders
#14
Jonas Raninen, Michael Livingston, Patrik Karlsson, Håkan Leifman, Ulf Guttormsson, Johan Svensson, Peter Larm
INTRODUCTION AND AIMS: Researchers in a number of countries have recently identified major changes in adolescent alcohol consumption since the early 2000s, with the prevalence of teenage drinking more than halving in some countries. The major aims of the current study are to examine if there are sub-groups among non-drinking Swedish ninth graders and to describe how the prevalence of these groups has changed during the period 1999 to 2015. DESIGN AND METHODS: Data from five waves of the Swedish European School Survey Project on Alcohol and other Drugs study was used...
February 6, 2018: Drug and Alcohol Review
https://www.readbyqxmd.com/read/29400614/coach-ratings-of-skills-and-their-relations-to-practice-play-and-successful-transitions-from-youth-elite-to-adult-professional-status-in-soccer
#15
David T Hendry, A Mark Williams, Nicola J Hodges
Elite soccer players (~15 yr) from professional academies in the UK were rated on technical, tactical, physical and creative skills by coaches at time 1 (T1). Players estimated accumulated hours in soccer practice (coach-led activities) and play (self-led activities) during childhood. Coach-ratings were again collected 2.5 yr later (T2) for players that received a professional contract (~17 yr). Adult-professional status was determined at T3 (~ 20 yr). Skill ratings distinguished across the three "future" groups (academy-only, youth-professional only and adult-professional), for all but creative skill...
February 5, 2018: Journal of Sports Sciences
https://www.readbyqxmd.com/read/29392997/relative-age-effects-in-swiss-talent-development-a-nationwide-analysis-of-all-sports
#16
Michael Romann, Roland Rössler, Marie Javet, Oliver Faude
Relative age effects (RAE) generate consistent participation inequalities and selection biases in sports. The study aimed to investigate RAE across all sports of the national Swiss talent development programme (STDP). In this study, 18 859 youth athletes (female N = 5353; mean age: 14.8 ± 2.5 y and male N = 13 506; mean age: 14.4 ± 2.4 y) in 70 sports who participated in the 2014 competitive season were evaluated. The sample was subdivided by sex and the national level selection (NLS, N = 2464)...
February 2, 2018: Journal of Sports Sciences
https://www.readbyqxmd.com/read/29383374/validation-of-a-custom-instrumented-retainer-form-factor-for-measuring-linear-and-angular-head-impact-kinematics
#17
Logan Miller, Calvin Kuo, Lyndia C Wu, Jillian Urban, David Camarillo, Joel D Stitzel
Head impact exposure in popular contact sports is not well understood, especially in the youth population, despite recent advances in impact-sensing technology which has allowed widespread collection of real-time head impact data. Head kinematics have been measured in previous studies using instrumented helmets, skin patches, skull caps, and instrumented mouthpieces. A limitation of instrumented helmets is that they cannot be used in contact sports where the athletes do not wear helmets, such as soccer and women's lacrosse...
January 30, 2018: Journal of Biomechanical Engineering
https://www.readbyqxmd.com/read/29381719/positive-youth-development-and-observed-athlete-behavior-in-recreational-sport
#18
Matthew Vierimaa, Mark W Bruner, Jean Côté
OBJECTIVES: Competence, confidence, connection, and character are regarded as outcomes of positive youth development (PYD) in sport. However, the specific athlete behaviors associated with different PYD profiles are not well understood. Thus, the purpose of this study was to investigate the relationship between athletes' observed behavior during sport competitions and their perceptions of PYD outcomes. DESIGN: Cross-sectional study with systematic behavioral observation...
2018: PloS One
https://www.readbyqxmd.com/read/29381402/comparison-of-baseline-impact-performance-in-amateur-motocross-riders-to-football-and-basketball-athletes
#19
Natalie K Sandel, Phillip R Worts, Scott Burkhart, Luke Henry
PRIMARY OBJECTIVE: The American Motorcyclist Association requires professional riders to undergo baseline computerized neurocognitive testing (CNT) using the Immediate Post-Concussion Assessment and Cognitive Testing (ImPACT) test for concussion management. It is recommended this practice be expanded to the amateur level, but limited research has explored whether baseline testing is necessary for youth when normative data is available. This study evaluates the utility of baseline testing for amateur riders by comparing their performance to those of traditional youth sports comprising normative datasets...
January 30, 2018: Brain Injury: [BI]
https://www.readbyqxmd.com/read/29367895/correlates-of-weekday-compliance-to-physical-activity-recommendations-in-swiss-youth-non-compliant-in-weekend-days
#20
Cédric Gubelmann, Pedro Marques-Vidal, Bettina Bringolf-Isler, L Suzanne Suggs, Peter Vollenweider, Bengt Kayser
Some children are inactive on weekends but active on weekdays. Correlates of such behavior remain to be clarified. We assessed school, out-of-school and family correlates of compliance with physical activity (PA) recommendations during weekdays among weekend non-compliant youth in Switzerland. Cross-sectional data collected in 2013-2015 from the SOPHYA study. PA was objectively measured during one week using waist-worn accelerometers. Compliance with PA recommendations (≥ 60 min/day of moderate-to-vigorous PA) was assessed separately for weekend and weekdays...
March 2018: Preventive Medicine Reports
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