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https://www.readbyqxmd.com/read/28608256/development-and-examination-of-a-functional-reactive-agility-test-for-older-adults
#1
Eric J Sobolewski, Brennan J Thompson, Eric C Conchola, Eric D Ryan
BACKGROUND: Reactive agility tests have become popular in sport for talent identification; however, the ability of these tests to evaluate physical function and falls risk in clinical populations warrants future study. AIM: To examine the reliability and construct validity of a novel functional reactive agility test (FRAT) across the lifespan. METHODS: Forty-three young (24 ± 2 years), 32 middle-aged (50 ± 2 years), and 19 old (66 ± 4 years) men performed a FRAT that included a rapid lateral movement (1...
June 12, 2017: Aging Clinical and Experimental Research
https://www.readbyqxmd.com/read/28605273/improving-the-prediction-of-maturity-from-anthropometric-variables-using-a-maturity-ratio
#2
Job Fransen, Stephen Bush, Stephen Woodcock, Andrew Novak, Dieter Deprez, Adam D G Baxter-Jones, Roel Vaeyens, Matthieu Lenoir
PURPOSE: This study aimed to improve the prediction accuracy of Age at Peak Height Velocity (APHV) from anthropometric assessment using non-linear models and a maturity ratio rather than a maturity offset. METHODS: The dataset used to develop the original prediction equations was used to test a new prediction model, utilising the maturity ratio and a polynomial prediction equation. This model was then applied to a sample of male youth academy soccer players (n = 1330) to validate the new model in youth athletes...
June 12, 2017: Pediatric Exercise Science
https://www.readbyqxmd.com/read/28578541/anthropometric-and-physical-qualities-of-elite-male-youth-rugby-league-players
#3
REVIEW
Kevin Till, Sean Scantlebury, Ben Jones
Rugby league is a collision team sport played at junior and senior levels worldwide, whereby players require highly developed anthropometric and physical qualities (i.e. speed, change-of-direction speed, aerobic capacity, muscular strength and power). Within junior levels, professional clubs and national governing bodies implement talent identification and development programmes to support the development of youth (i.e. 13-20 years) rugby league players into professional athletes. This review presents and critically appraises the anthropometric and physical qualities of elite male youth rugby league players aged between 13 and 20 years, by age category, playing standard and playing position...
June 3, 2017: Sports Medicine
https://www.readbyqxmd.com/read/28488940/elite-african-marathoners-specialize-earlier-than-elite-non-african-marathoners
#4
Tyler J Noble, Robert F Chapman
PURPOSE: To assess differences in event specific specialization between elite African and Non-African male marathon runners on the basis of age, performance, and career length. METHODS: The top 90 African marathoners from 2001-2015 were compared to the top 90 Non-African marathoners from the same time period across various markers related to specialization age, performance, and career length. Independent t-tests were used to identify significant differences (P<0...
May 10, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28488905/tactical-behaviours-in-men-s-800m-olympic-and-world-championship-medallists-a-changing-of-the-guard
#5
Gareth N Sandford, Simon Pearson, Sian V Allen, Rita M Malcata, Andrew E Kilding, Angus Ross, Paul B Laursen
PURPOSE: To assess the longitudinal evolution of tactical behaviours used to medal in Men's 800m (M800) Olympic Games (OG) or World Championship (WC) events in the recent competition era (2000-2016). METHODS: Thirteen OG and WC events were characterised for first and second lap splits using available footage from YouTube. Positive pacing strategies were defined as a faster first lap. Season's best M800 time and world ranking, reflective of an athlete's 'peak condition', was obtained to determine relationships between adopted tactics and physical condition prior to the championships...
May 10, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28419175/talent-identification-and-recruitment-in-youth-soccer-recruiter-s-perceptions-of-the-key-attributes-for-player-recruitment
#6
Paul Larkin, Donna O'Connor
Using the modified Delphi method, we aimed to understand the attributes youth coaches and recruiters perceive as important when identifying skilled youth performance at the entry level of representative soccer in Australia (i.e., Under 13 years). Furthermore, we also aimed to describe the current methods youth coaches and recruiters use to assess and identify these attributes in youth players. Australian regional youth technical directors and coaches (n = 20) completed a three stage process, including an initial interview and two subsequent questionnaires, whereby attributes and qualities associated with talent identification were rated and justified according to the importance for youth player performance and talent identification...
2017: PloS One
https://www.readbyqxmd.com/read/28416892/anthropometric-and-physical-characteristics-allow-differentiation-of-young-female-volleyball-players-according-to-playing-position-and-level-of-expertise
#7
M Milić, Z Grgantov, K Chamari, L P Ardigò, A Bianco, J Padulo
The aim of our study was to determine the differences in some anthropometric and physical performance variables of young Croatian female volleyball players (aged 13 to 15) in relation to playing position (i.e., independent variable) and performance level within each position (i.e., independent variable). Players were categorized according to playing position (i.e., role) as middle blockers (n=28), opposite hitters (n=41), passer-hitters (n=54), setters (n=30), and liberos (n=28). Within each position, players were divided into a more successful group and a less successful group according to team ranking in the latest regional championship and player quality within the team...
March 2017: Biology of Sport
https://www.readbyqxmd.com/read/28416354/unilateral-jumps-in-different-directions-a-novel-assessment-of-soccer-associated-power
#8
Conall F Murtagh, Jos Vanrenterghem, Andrew O'Boyle, Ryland Morgans, Barry Drust, Robert M Erskine
OBJECTIVES: We aimed to determine whether countermovement jumps (CMJs; unilateral and bilateral) performed in different directions assessed independent lower-limb power qualities, and if unilateral CMJs would better differentiate between elite and non-elite soccer players than the bilateral vertical (BV) CMJ. DESIGN: Elite (n=23; age, 18.1±1.0years) and non-elite (n=20; age, 22.3±2.7years) soccer players performed three BV, unilateral vertical (UV), unilateral horizontal-forward (UH) and unilateral medial (UM) CMJs...
March 29, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28410998/a-retrospective-longitudinal-analysis-of-anthropometric-and-physical-qualities-that-associate-with-adult-career-attainment-in-junior-rugby-league-players
#9
Kevin Till, David Morley, John O'Hara, Ben L Jones, Chris Chapman, Clive B Beggs, Carlton Cooke, Stephen Cobley
OBJECTIVES: To retrospectively compare the longitudinal physical development of junior rugby league players between the Under 13 and 15 age categories in relation to their adult career attainment outcome. DESIGN: Retrospective longitudinal design. METHODS: Fifty-one former junior rugby league players were retrospectively grouped according to their career attainment outcome as adults (i.e., amateur, academy or professional). As juniors, players undertook a physical testing battery on three consecutive annual occasions (Under 13s, 14s, 15s) including height, body mass, sum of four skinfolds, maturation, vertical jump, medicine ball chest throw, 10-60m sprint, agility 505 and estimated V˙O2max ...
March 30, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28406356/the-association-between-fundamental-athletic-movements-and-physical-fitness-in-elite-junior-australian-footballers
#10
Carl T Woods, Ian McKeown, Justin Keogh, Sam Robertson
This study investigated the associations between fundamental athletic movement and physical fitness in junior Australian football (AF). Forty-four under 18 players performed a fundamental athletic movement assessment consisting of an overhead squat, double lunge, single leg Romanian deadlift and a push up. Movements were scored on three assessment criterions using a three-point scale. Additionally, participants performed five physical fitness tests commonly used for talent identification in AF. A Spearman's nonparametric correlation matrix was built, with correlation coefficients being visualised using a circularly rendered correlogram...
April 13, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28394831/progression-in-youth-soccer-selection-and-identification-in-youth-soccer-players-aged-13-15-years
#11
Iraia Bidaurrazaga-Letona, José Antonio Lekue, Markos Amado, Susana Maria Gil
The aim of this study was to identify the factors which are important for the identification and selection of young soccer players. Ninety four adolescent soccer players from the Under-13 (U13; age=12.3 ± 0.3 years; n=50) and Under-15 (U15; age=14.0 ± 0.2 years; n=44) categories belonging to a professional club participated in the study. Anthropometric measurements, physical tests (sprint, agility, endurance and jump) and maturity status (age at peak height velocity) were recorded over four seasons. Comparisons were performed amongst new players joining the club (Enter players, n=15), players progressing to the next age category (Club players, n=54) and players leaving the club (Deselected players, n=25)...
April 7, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28290725/staying-out-of-range-increasing-attacking-distance-in-fencing
#12
Anthony N Turner, Geoff Marshall, Angelo Noto, Shyam Chavda, Nathan Atlay, David Kirby
To avoid being hit, fencers typically adopt an out of range position, which was hypothesized to be governed by body- and action-scaled affordances. This theory was measured in elite and national level junior (u20) fencers. Associations between "reachability" of lunging and step-lunging attacks, was assessed against height, arm-span, leg-span, body mass and lower-body power, and then compared across level. Reachability was determined as the distance covered by fencers during these attacks and was reported as actual and estimated distances...
March 14, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28210345/the-dutch-technical-tactical-tennis-test-d4t-for-talent-identification-and-development-psychometric-characteristics
#13
Nikki Kolman, Barbara Huijgen, Tamara Kramer, Marije Elferink-Gemser, Chris Visscher
This study examined the test-retest reliability, validity and feasibility of the newly developed Dutch Technical-Tactical Tennis Test (D4T). This new test is relevant for talent identification and development in tennis. Thirty-two youth male tennis players (age 13.4 ± 0.5) were classified as elite (n = 15) or sub-elite (n = 17) according to their position on the national youth ranking list under 15 years (cut-off rank 50) in the Netherlands. Games, rallies and different tactical situations (i.e. offensive, neutral and defensive) were simulated with a ball machine...
January 1, 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28129283/comment-on-match-analysis-of-u9-and-u10-english-premier-league-academy-soccer-players-using-a-global-positioning-system-relevance-for-talent-identification-and-development
#14
Christopher Carling, Dave Collins
No abstract text is available yet for this article.
February 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28125339/classification-of-playing-position-in-elite-junior-australian-football-using-technical-skill-indicators
#15
Carl T Woods, James Veale, Job Fransen, Sam Robertson, Neil French Collier
​In team sport, classifying playing position based on a players' expressed skill sets can provide a guide to talent identification by enabling the recognition of performance attributes relative to playing position. Here, elite junior Australian football players were a priori classified into 1 of 4 common playing positions; forward, midfield, defence, and ruck. Three analysis approaches were used to assess the extent to which 12 in-game skill performance indicators could classify playing position. These were a linear discriminant analysis (LDA), random forest, and a PART decision list...
January 26, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28031773/developing-talented-soccer-players-an-analysis-of-socio-spatial-factors-as-possible-key-constraints
#16
Jaime Serra-Olivares, Juan C Pastor-Vicedo, Sixto González-Víllora, Israel Teoldo da Costa
Most studies on the identification and development of soccer talent have been one-dimensional in nature. Although some multi-dimensional analyses have been conducted, few research studies have assessed in any depth the socio-spatial factors influencing talent development. The aim of this particular study was to analyse variations in the international representation of clubs (n = 821) and countries (n = 59) in the development of players who took part in the 2014 FIFA Soccer World Cup. Clubs and countries were ranked and divided into quartiles according to the number of players developed between the ages of 15 and 21 (clubs and countries that developed players for at least three years between these ages) and the number of official league matches played by these players up to the age of 23...
December 1, 2016: Journal of Human Kinetics
https://www.readbyqxmd.com/read/27899345/ethics-of-genetic-testing-and-research-in-sport-a-position-statement-from-the-australian-institute-of-sport
#17
Nicole Vlahovich, Peter A Fricker, Matthew A Brown, David Hughes
As Australia's peak high-performance sport agency, the Australian Institute of Sport (AIS) has developed this position statement to address the implications of recent advances in the field of genetics and the ramifications for the health and well-being of athletes. Genetic testing has proven of value in the practice of clinical medicine. There are, however, currently no scientific grounds for the use of genetic testing for athletic performance improvement, sport selection or talent identification. Athletes and coaches should be discouraged from using direct-to-consumer genetic testing because of its lack of validation and replicability and the lack of involvement of a medical practitioner in the process...
January 2017: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/27899276/a-comparison-of-the-physical-and-anthropometric-qualities-explanatory-of-talent-in-the-elite-junior-australian-football-development-pathway
#18
Carl T Woods, Ashley Cripps, Luke Hopper, Christopher Joyce
OBJECTIVES: To compare the physical and anthropometric qualities explanatory of talent at two developmental levels in junior Australian football (AF). DESIGN: Cross-sectional observational. METHODS: From a total of 134 juniors, two developmental levels were categorised; U16 (n=50; 15.6±0.3 y), U18 (n=84; 17.4±0.5 y). Within these levels, two groups were a priori defined; talent identified (U16; n=25; 15.7±0.2 y; U18 n=42; 17.5±0.4 y), non-talent identified (U16; n=25; 15...
November 23, 2016: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/27806003/fitness-profiles-of-elite-adolescent-irish-rugby-union-players
#19
Daniel J Wood, Garrett Coughlan, Eamonn Delahunt
Rugby unions throughout the world are implementing player development models in order to prepare young players to meet the demands of professional rugby union. An example of this is the Irish Rugby Football Union Long Term Player Development model. The purpose of the present study was to provide normative data relating to the physical fitness of elite adolescent Irish rugby union players and determine the differences in the physical capacities between players in the forward and back units, as well as providing descriptive data for the position categorizations within these units for this unique population...
October 27, 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27803635/discriminating-talent-identified-junior-australian-footballers-using-a-fundamental-gross-athletic-movement-assessment
#20
Carl T Woods, Harry G Banyard, Ian McKeown, Job Fransen, Sam Robertson
Talent identification (TID) is a pertinent component of the sports sciences, affording practitioners the opportunity to target developmental interventions to a select few; optimising financial investments. However, TID is multi-componential, requiring the recognition of immediate and prospective performance. The measurement of athletic movement skill may afford practitioners insight into the latter component given its augmented relationship with functional sport specific qualities. It is currently unknown whether athletic movement skill is a discriminant quality in junior Australian football (AF)...
September 2016: Journal of Sports Science & Medicine
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