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https://www.readbyqxmd.com/read/29145504/quantifying-performance-on-an-outdoor-agility-drill-using-foot-mounted-inertial-measurement-units
#1
Antonia M Zaferiou, Lauro Ojeda, Stephen M Cain, Rachel V Vitali, Steven P Davidson, Leia Stirling, Noel C Perkins
Running agility is required for many sports and other physical tasks that demand rapid changes in body direction. Quantifying agility skill remains a challenge because measuring rapid changes of direction and quantifying agility skill from those measurements are difficult to do in ways that replicate real task/game play situations. The objectives of this study were to define and to measure agility performance for a (five-cone) agility drill used within a military obstacle course using data harvested from two foot-mounted inertial measurement units (IMUs)...
2017: PloS One
https://www.readbyqxmd.com/read/29143595/why-nature-prevails-over-nurture-in-the-making-of-the-elite-athlete
#2
Evelina Georgiades, Vassilis Klissouras, Jamie Baulch, Guan Wang, Yannis Pitsiladis
While the influence of nature (genes) and nurture (environment) on elite sporting performance remains difficult to precisely determine, the dismissal of either as a contributing factor to performance is unwarranted. It is accepted that a complex interaction of a combination of innumerable factors may mold a talented athlete into a champion. The prevailing view today is that understanding elite human performance will require the deciphering of two major sources of individual differences, genes and the environment...
November 14, 2017: BMC Genomics
https://www.readbyqxmd.com/read/29142276/detecting-the-relevance-to-performance-of-whole-body-movements
#3
Daisuke Furuki, Ken Takiyama
Goal-directed whole-body movements are fundamental in our daily life, sports, music, art, and other activities. Goal-directed movements have been intensively investigated by focusing on simplified movements (e.g., arm-reaching movements or eye movements); however, the nature of goal-directed whole-body movements has not been sufficiently investigated because of the high-dimensional nonlinear dynamics and redundancy inherent in whole-body motion. One open question is how to overcome high-dimensional nonlinear dynamics and redundancy to achieve the desired performance...
November 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29140314/self-perceived-fatigue-in-adolescents-in-relation-to-body-composition-and-physical-outcomes
#4
Stijn Vantieghem, Ivan Bautmans, Jonathan Tresignie, Steven Provyn
BackgroundIncreased self-perceived fatigue (SpF) has already been identified in chronic conditions such as obesity, but it is also a growing problem in school-attending adolescents (±25%). This study tried to link body composition to SpF and physical activity/performance. Additionally, indicators for fatigue were determined.MethodsA total of 452 adolescents were recruited. Body composition was measured and physical activity, physical performance, and SpF were assessed. Based on the total SpF (Multidimensional Fatigue Inventory) outcomes, three groups were created: low fatigue (LF) medium fatigue (MF) and high fatigue (HF)...
November 15, 2017: Pediatric Research
https://www.readbyqxmd.com/read/29138604/sport-related-anxiety-current-insights
#5
REVIEW
Jessica L Ford, Kenneth Ildefonso, Megan L Jones, Monna Arvinen-Barrow
To date, much research has been devoted to understanding how anxiety can affect sport performance, both in practice and in competitive settings. It is well known that sport has the potential for high levels of stress and anxiety, and that practicing and employing a range of psychological strategies can be beneficial in anxiety management. Equally, growing evidence also suggests that anxiety can play a role in sport injury prevention, occurrence, rehabilitation, and the return to sport process. The purpose of this paper is to provide current insights into sport-related anxiety...
2017: Open Access Journal of Sports Medicine
https://www.readbyqxmd.com/read/29138214/sport-science-internships-for-learning-a-critical-view
#6
EDITORIAL
James J Malone
Sport science has gained vast popularity with students who have an interest in both physiology and the underpinning mechanisms of exercise concerning performance and health. The high numbers of graduates each year, coupled with the low number of graduate positions working in sports, has led to a high level of competition between students. To stand out from the crowd, sport science students may undertake an internship placement as part of their course, designed to enhance theoretical, practical, and soft skills in an applied setting...
December 1, 2017: Advances in Physiology Education
https://www.readbyqxmd.com/read/29135275/the-effects-of-playing-multiple-high-school-sports-on-national-basketball-association-players-propensity-for-injury-and-athletic-performance
#7
Caitlin Rugg, Adarsh Kadoor, Brian T Feeley, Nirav K Pandya
BACKGROUND: Athletes who specialize in their sport at an early age may be at risk for burnout, overuse injury, and reduced attainment of elite status. Timing of sport specialization has not been studied in elite basketball athletes. HYPOTHESIS: National Basketball Association (NBA) players who played multiple sports during adolescence would be less likely to experience injury and would have higher participation rates in terms of games played and career length compared with single-sport athletes...
November 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29135269/return-to-play-after-hip-arthroscopic-surgery-for-femoroacetabular-impingement-in-professional-soccer-players
#8
Renato Locks, Hajime Utsunomiya, Karen K Briggs, Shannen McNamara, Jorge Chahla, Marc J Philippon
BACKGROUND: Arthroscopic hip surgery has been shown to be effective in returning professional athletes back to play at a high level of performance in different sports. Limited information exists regarding professional soccer players and their return to play. PURPOSE: To determine the rate and time to return to sport for professional soccer players after hip arthroscopic surgery for the treatment of femoroacetabular impingement (FAI) and to identify possible risk factors associated with a delay in returning to play...
November 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29134049/the-prevalence-and-covariates-of-potential-doping-behavior-in-kickboxing-analysis-among-high-level-athletes
#9
Damir Sekulic, Natasa Zenic, Sime Versic, Dora Maric, Goran Gabrilo, Mario Jelicic
The official reports on doping behavior in kickboxing are alarming, but there have been no empirical studies that examined this problem directly. The aim of this study was to investigate the prevalence, gender differences and covariates of potential-doping-behavior, in kickboxing athletes. A total of 130 high-level kickboxing athletes (92 males, 21.37 ± 4.83 years of age, 8.39 ± 5.73 years of training experience; 38 women, 20.31 ± 2.94 years of age; 9.84 ± 4.74 years of training experience) completed questionnaires to study covariates and potential-doping behavior...
October 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29132727/speed-profiles-in-wheelchair-court-sports-comparison-of-two-methods-for-measuring-wheelchair-mobility-performance
#10
R M A van der Slikke, B S Mason, M A M Berger, V L Goosey-Tolfrey
Wheelchair mobility performance is an important aspect in most wheelchair court sports, commonly measured with an indoor tracking system or wheelchair bound inertial sensors. Both methods provide key wheelchair mobility performance outcomes regarding speed. In this study, we compared speed profiles of both methods to gain insight into the level of agreement, for recommendations regarding future performance measurement. Data were obtained from 5 male highly trained wheelchair basketball players during match play...
November 10, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/29131779/sport-sampling-is-associated-with-improved-landing-technique-in-youth-athletes
#11
Lindsay J DiStefano, Eleanor M Beltz, Hayley J Root, Jessica C Martinez, Andrew Houghton, Nicole Taranto, Katherine Pearce, Erin McConnell, Courtney Muscat, Steve Boyle, Thomas H Trojian
BACKGROUND: Sport sampling is recommended to promote fundamental movement skill acquisition and physical activity. In contrast, sport specialization is associated with musculoskeletal injury risk, burnout, and attrition from sport. There is limited evidence to support the influence of sport sampling on neuromuscular control, which is associated with injury risk, in youth athletes. HYPOTHESIS: Athletes who participated in only 1 sport during the previous year would demonstrate higher Landing Error Scoring System (LESS) scores than their counterparts...
November 1, 2017: Sports Health
https://www.readbyqxmd.com/read/29130715/relationship-of-long-term-macronutrients-intake-on-anabolic-catabolic-hormones-in-female-elite-volleyball-players
#12
Juan Mielgo Ayuso, Michael C Zpurdos, Aritz Urdampilleta, Julio Calleja González, Jesús Seco, Alfredo Córdova
INTRODUCTION: Specific macronutrient distribution and training can alter acute and chronic hormone behavior and, subsequently, sport performance. OBJECTIVE: The main aim was to examine relationships between dietary intake and anabolic/catabolic hormone response in elite female volleyball players during a 29-week season. METHODS: Twenty-two elite female volleyballers (26.4 ± 5.6 years; 178 ± 9 cm; 67.1 ± 7.5 kg) had dietary intake (seven-day dietary recall and food frequency questionnaire), blood concentration of anabolic/catabolic hormones concentration, physical performance, and body composition assessed at four time points: a) T1: baseline/pre-testing; b) T2: eleven weeks after T1; c) T3: ten weeks after T2; and d) T4: eight weeks after T3...
October 24, 2017: Nutrición Hospitalaria: Organo Oficial de la Sociedad Española de Nutrición Parenteral y Enteral
https://www.readbyqxmd.com/read/29129021/the-effect-of-natural-or-simulated-altitude-training-on-high-intensity-intermittent-running-performance-in-team-sport-athletes-a-meta-analysis
#13
REVIEW
Michael J Hamlin, Catherine A Lizamore, Will G Hopkins
BACKGROUND: While adaptation to hypoxia at natural or simulated altitude has long been used with endurance athletes, it has only recently gained popularity for team-sport athletes. OBJECTIVE: To analyse the effect of hypoxic interventions on high-intensity intermittent running performance in team-sport athletes. METHODS: A systematic literature search of five journal databases was performed. Percent change in performance (distance covered) in the Yo-Yo intermittent recovery test (level 1 and level 2 were used without differentiation) in hypoxic (natural or simulated altitude) and control (sea level or normoxic placebo) groups was meta-analyzed with a mixed model...
November 11, 2017: Sports Medicine
https://www.readbyqxmd.com/read/29128143/influence-of-type-of-sport-on-cardiac-repolarization-assessed-by-electrocardiographic-t-wave-morphology-combination-score
#14
Susanne Glasius Tischer, Claus Graff, Christina Ellervik, Eva Prescott, Jørgen K Kanters, Hanne Kruuse Rasmusen
INTRODUCTION: Interpreting repolarization changes in the electrocardiograms of athletes present a clinical challenge. AIM: Assessment of cardiac repolarization by T-wave morphology using the Morphology Combination Score (MCS), and evaluate how this quantitative description of T-wave morphology was influenced by the sport performed. MATERIALS AND METHODS: Digital electrocardiograms of 469 young elite athletes were analyzed for T-wave asymmetry, flatness and notching, and combined in the MCS...
September 29, 2017: Journal of Electrocardiology
https://www.readbyqxmd.com/read/29127516/vision-and-visual-history-in-elite-near-elite-level-cricketers-and-rugby-league-players
#15
Brendan T Barrett, Jonathan C Flavell, Simon J Bennett, Alice G Cruickshank, Alex Mankowska, Julie M Harris, John G Buckley
BACKGROUND: The importance of optimal and/or superior vision for participation in high-level sports remains the subject of considerable clinical research interest. Here, we examine the vision and visual history of elite/near-elite cricketers and rugby-league players. METHODS: Stereoacuity (TNO), colour vision, and distance (with/without pinhole) and near visual acuity (VA) were measured in two cricket squads (elite/international-level, female, n = 16; near-elite, male, n = 23) and one professional rugby-league squad (male, n = 20)...
November 10, 2017: Sports Medicine—Open
https://www.readbyqxmd.com/read/29125560/human-actions-analysis-templates-generation-matching-and-visualization-applied-to-motion-capture-of-highly-skilled-karate-athletes
#16
Tomasz Hachaj, Marcin Piekarczyk, Marek R Ogiela
The aim of this paper is to propose and evaluate the novel method of template generation, matching, comparing and visualization applied to motion capture (kinematic) analysis. To evaluate our approach, we have used motion capture recordings (MoCap) of two highly-skilled black belt karate athletes consisting of 560 recordings of various karate techniques acquired with wearable sensors. We have evaluated the quality of generated templates; we have validated the matching algorithm that calculates similarities and differences between various MoCap data; and we have examined visualizations of important differences and similarities between MoCap data...
November 10, 2017: Sensors
https://www.readbyqxmd.com/read/29120398/bamboo-polylactic-acid-pla-composite-material-for-structural-applications
#17
Angel Pozo Morales, Alfredo Güemes, Antonio Fernandez-Lopez, Veronica Carcelen Valero, Sonia De La Rosa Llano
Developing an eco-friendly industry based on green materials, sustainable technologies, and optimum processes with low environmental impact is a general societal goal, but this remains a considerable challenge to achieve. Despite the large number of research on green structural composites, limited investigation into the most appropriate manufacturing methodology to develop a structural material at industrial level has taken place. Laboratory panels have been manufactured with different natural fibers but the methodologies and values obtained could not be extrapolated at industrial level...
November 9, 2017: Materials
https://www.readbyqxmd.com/read/29118954/measuring-system-and-method-of-determining-the-adaptive-force
#18
Laura Schaefer, Marko Hoff, Frank Bittmann
The term Adaptive Force (AF) describes the capability of adaptation of the nerve-muscle-system to externally applied forces during isometric and eccentric muscle action. This ability plays an important role in real life motions as well as in sports. The focus of this paper is on the specific measurement method of this neuromuscular action, which can be seen as innovative. A measuring system based on the use of compressed air was constructed and evaluated for this neuromuscular function. It depends on the physical conditions of the subject, at which force level it deviates from the quasi isometric position and merges into eccentric muscle action...
June 27, 2017: European Journal of Translational Myology
https://www.readbyqxmd.com/read/29117014/what-s-new-in-pediatric-upper-extremity-sports-injuries
#19
Jennifer J Beck, Connor G Richmond, Marc A Tompkins, Ann Heyer, Kevin G Shea, Aristides I Cruz
BACKGROUND: Sports injuries are common in pediatric and adolescent patients and the evaluation and treatment of these injuries continues to evolve. The purpose of this review is to provide a comprehensive appraisal of the most recent literature, highlighting updates on sports-related upper extremity injuries in pediatric patients. METHODS: An electronic search of the PubMed, EMBASE, and Google Scholar databases was performed for keywords related to pediatric overhead athletes, osteochondritis dissecans (OCD) of the capitellum, medial epicondyle fractures, shoulder instability, and clavicle fractures...
November 7, 2017: Journal of Pediatric Orthopedics
https://www.readbyqxmd.com/read/29115866/four-experimental-stimulants-found-in-sports-and-weight-loss-supplements-2-amino-6-methylheptane-octodrine-1-4-dimethylamylamine-1-4-dmaa-1-3-dimethylamylamine-1-3-dmaa-and-1-3-dimethylbutylamine-1-3-dmba
#20
Pieter A Cohen, John C Travis, Peter H J Keizers, Patricia Deuster, Bastiaan J Venhuis
BACKGROUND: The United States Food and Drug Administration banned the stimulant 1,3-dimethylamylamine (1,3-DMAA) from dietary supplements and warned consumers that the stimulant can pose cardiovascular risks ranging from high blood pressure to heart attacks. OBJECTIVES: We designed our study to determine if a new stimulant similar in structure to 1,3-DMAA has been introduced as an ingredient in supplements sold in the United States (US). METHODS: We analyzed six brands of supplements that listed an ingredient on the label (e...
November 8, 2017: Clinical Toxicology
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