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https://www.readbyqxmd.com/read/28210349/a-comparison-of-serve-speed-and-motor-coordination-between-elite-and-club-level-tennis-players
#1
Mustafa Söğüt
The purpose of this study was to compare the serve speed and motor coordination of elite and club level junior tennis players aged 11-14 years. Participants (n=35) were assigned to one of the two groups according to their experience, weekly training volume and competition level. Serve speed was assessed with a sports radar gun. Motor coordination was evaluated by means of the Körperkoordinationstest für Kinder. The main results revealed that serve speed and motor coordination performance levels of the elite group were significantly higher than those of the club group...
January 1, 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28207671/a-silver-medal-winner-at-the-13th-world-wu-shu-championship-2015-17-months-after-selective-thoracic-fusion-for-adolescent-idiopathic-scoliosis-a-case-report
#2
Chris Yin Wei Chan, Izzuddin Aziz, Fong Wei Chai, Mun Keong Kwan
STUDY DESIGN: Case report. OBJECTIVE: To report the successful rehabilitation and the training progress of an elite high performance martial art exponent after selective thoracic fusion for Adolescent Idiopathic Scoliosis (AIS). SUMMARY OF BACKGROUND DATA: Posterior spinal fusion for AIS will result in loss of spinal flexibility. The process of rehabilitation after posterior spinal fusion for AIS remains controversial and there are few reports of return to elite sports performance after posterior spinal fusion for AIS...
February 15, 2017: Spine
https://www.readbyqxmd.com/read/28192911/open-port-probe-sampling-interface-for-the-direct-coupling-of-biocompatible-solid-phase-microextraction-to-atmospheric-pressure-ionization-mass-spectrometry
#3
Germán Augusto Gómez-Ríos, Chang Liu, Marcos Tascon, Nathaly Reyes-Garcés, Don W Arnold, Thomas R Covey, Janusz Pawliszyn
In recent years, the direct coupling of solid phase microextraction (SPME) and mass spectrometry (MS) has shown its great potential to improve limits of quantitation, accelerate analysis throughput, and diminish potential matrix effects when compared to direct injection to MS. In this study, we introduce the open port probe (OPP) as a robust interface to couple biocompatible SPME (Bio-SPME) fibers to MS systems for direct electrospray ionization. The presented design consisted of minimal alterations to the front-end of the instrument and provided better sensitivity, simplicity, speed, wider compound coverage, and high-throughput in comparison to the LC-MS based approach...
February 13, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28192036/using-acute-performance-on-a-comprehensive-neurocognitive-vestibular-and-ocular-motor-assessment-battery-to-predict-recovery-duration-after-sport-related-concussions
#4
Alicia M Sufrinko, Gregory F Marchetti, Paul E Cohen, R J Elbin, Valentina Re, Anthony P Kontos
BACKGROUND: A sport-related concussion (SRC) is a heterogeneous injury that requires a multifaceted and comprehensive approach for diagnosis and management, including symptom reports, vestibular/ocular motor assessments, and neurocognitive testing. PURPOSE: To determine which acute (eg, within 7 days) vestibular, ocular motor, neurocognitive, and symptom impairments predict the duration of recovery after an SRC. STUDY DESIGN: Cohort study (prognosis); Level of evidence, 2...
February 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28187157/distinct-eye-movement-patterns-enhance-dynamic-visual-acuity
#5
Dimitrios J Palidis, Pearson A Wyder-Hodge, Jolande Fooken, Miriam Spering
Dynamic visual acuity (DVA) is the ability to resolve fine spatial detail in dynamic objects during head fixation, or in static objects during head or body rotation. This ability is important for many activities such as ball sports, and a close relation has been shown between DVA and sports expertise. DVA tasks involve eye movements, yet, it is unclear which aspects of eye movements contribute to successful performance. Here we examined the relation between DVA and the kinematics of smooth pursuit and saccadic eye movements in a cohort of 23 varsity baseball players...
2017: PloS One
https://www.readbyqxmd.com/read/28186497/agility-in-young-athletes-is-it-a-different-ability-from-speed-and-power
#6
Yassine Negra, Helmi Chaabene, Mehréz Hammami, Samiha Amara, Senda Sammoud, Bessem Mkaouer, Younés Hachana
Negra, Y, Chaabene, H, Hammami, M, Amara, S, Sammoud, S, Mkaouer, B, and Hachana, Y. Agility in young athletes: is it a different ability from speed and power? J Strength Cond Res 31(3): 727-735, 2017-Agility is an important physical attribute for successful participation in team sports events. Illinois agility test (IAT) and T-test have been widely used within adult team sports players to assess agility performance. The purposes of this investigation are (a) to study the reliability and the sensitivity of both IAT and T-test scores and (b) to explore to what extend the agility is an independent physical ability from speed time and jumping ability...
March 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28182502/effect-of-dietary-nitrate-supplementation-on-swimming-performance-in-trained-swimmers
#7
Sam Lowings, Oliver Michael Shannon, Kevin Deighton, Jamie Matu, Matthew John Barlow
Nitrate supplementation appears to be most ergogenic when oxygen availability is restricted and subsequently may be particularly beneficial for swimming performance due to the breath-hold element of this sport. This represents the first investigation of nitrate supplementation and swimming time-trial (TT) performance. In a randomised double-blind repeated-measures crossover study, ten (5male, 5female) trained swimmers ingested 140ml nitrate-rich (~12.5mmol nitrate) or nitrate-depleted (~0.01mmol nitrate) beetroot juice...
February 9, 2017: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/28182471/efficacy-of-cognitive-rehabilitation-using-computer-software-with-individuals-living-with-schizophrenia-a-randomized-controlled-trial-in-japan
#8
Kazuhiko Iwata, Yasuhiro Matsuda, Sayaka Sato, Shunichi Furukawa, Yukako Watanabe, Norifumi Hatsuse, Emi Ikebuchi
OBJECTIVE: Cognitive impairment is common in schizophrenia, and is associated with poor psychosocial functioning. Previous studies had inconsistently shown improvement in cognitive functions with cognitive remediation therapy. This study examined whether cognitive remediation is effective in improving both cognitive and social functions in schizophrenia in outpatient settings that provide learning-based psychiatric rehabilitation. This study is the first randomized controlled trial of cognitive remediation in Japan...
February 9, 2017: Psychiatric Rehabilitation Journal
https://www.readbyqxmd.com/read/28158961/people-with-chronic-neck-pain-walk-with-a-stiffer-spine
#9
Deborah Falla, Leonardo Gizzi, Hesam Parsa, Angela Dieterich, Frank Petzke
Study Design Case-control. Background People with chronic neck pain present a number of sensorimotor and biomechanical alterations, yet little is known about the influence of neck pain on gait and motions of the spine during gait. Objective To evaluate the spine kinematics and gait characteristics in people with non-specific chronic neck pain. Methods People with chronic non-specific neck pain and age and gender matched asymptomatic controls walked on a treadmill at three different speeds (self-selected, 3km/h, 5km/h) either with their head in a neutral position or rotated 30º...
February 3, 2017: Journal of Orthopaedic and Sports Physical Therapy
https://www.readbyqxmd.com/read/28149425/the-integration-of-internal-and-external-training-load-metrics-in-hurling
#10
Shane Malone, Dominic Doran, Ibrahim Akubat, Kieran Collins
The current study aimed to assess the relationship between the hurling player's fitness profile and integrated training load (TL) metrics. Twenty-five hurling players performed treadmill testing for VO2max, the speed at blood lactate concentrations of 2 mmol•L-1 (vLT) and 4 mmol•L-1 (vOBLA) and the heart rate-blood lactate profile for calculation of individual training impulse (iTRIMP). The total distance (TD; m), high speed distance (HSD; m) and sprint distance (SD; m) covered were measured using GPS technology (4-Hz, VX Sport, Lower Hutt, New Zealand) which allowed for the measurement of the external TL...
December 1, 2016: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28149406/the-influence-of-x-factor-trunk-rotation-and-experience-on-the-quality-of-the-badminton-forehand-smash
#11
Zhao Zhang, Shiming Li, Bingjun Wan, Peter Visentin, Qinxian Jiang, Mary Dyck, Hua Li, Gongbing Shan
No existing studies of badminton technique have used full-body biomechanical modeling based on three-dimensional (3D) motion capture to quantify the kinematics of the sport. The purposes of the current study were to: 1) quantitatively describe kinematic characteristics of the forehand smash using a 15-segment, full-body biomechanical model, 2) examine and compare kinematic differences between novice and skilled players with a focus on trunk rotation (the X-factor), and 3) through this comparison, identify principal parameters that contributed to the quality of the skill...
December 1, 2016: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28149399/a-systematic-review-of-the-main-factors-that-determine-agility-in-sport-using-structural-equation-modeling
#12
Vladimir Hojka, Petr Stastny, Tomas Rehak, Artur Gołas, Aleksandra Mostowik, Marek Zawart, Martin Musálek
While tests of basic motor abilities such as speed, maximum strength or endurance are well recognized, testing of complex motor functions such as agility remains unresolved in current literature. Therefore, the aim of this review was to evaluate which main factor or factor structures quantitatively determine agility. In methodological detail, this review focused on research that explained or described the relationships between latent variables in a factorial model of agility using approaches such as principal component analysis, factor analysis and structural equation modeling...
September 1, 2016: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28149368/the-influence-of-the-gait-related-arm-swing-on-elevation-gain-measured-by-sport-watches
#13
Rahel Ammann, Wolfgang Taube, Matthias Neuhaus, Thomas Wyss
The elevation gain is an important contributor to the total workload in endurance sports. The purpose of this study was to evaluate the influence of the arm swing on elevation gain in three sport watches (Garmin® Forerunner 910XT, Polar® RS800CX and Suunto® Ambit2) on a flat 400 m outdoor track. Altogether, a total of 120 repetitions of 1,200 m were performed at self-selected speeds corresponding to strolling, walking, jogging and running. During the assessment two devices of each sport watch, one secured on the hip and one on the wrist, were worn by the participants...
June 1, 2016: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28149339/maximum-velocities-in-flexion-and-extension-actions-for-sport
#14
David M Jessop, Matthew T G Pain
Speed of movement is fundamental to the outcome of many human actions. A variety of techniques can be implemented in order to maximise movement speed depending on the goal of the movement, constraints, and the time available. Knowing maximum movement velocities is therefore useful for developing movement strategies but also as input into muscle models. The aim of this study was to determine maximum flexion and extension velocities about the major joints in upper and lower limbs. Seven university to international level male competitors performed flexion/extension at each of the major joints in the upper and lower limbs under three conditions: isolated; isolated with a countermovement; involvement of proximal segments...
April 1, 2016: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28146562/hip-hop-dance-experience-linked-to-sociocognitive-ability
#15
Justin W Bonny, Jenna C Lindberg, Marc C Pacampara
Expertise within gaming (e.g., chess, video games) and kinesthetic (e.g., sports, classical dance) activities has been found to be linked with specific cognitive skills. Some of these skills, working memory, mental rotation, problem solving, are linked to higher performance in science, technology, math, and engineering (STEM) disciplines. In the present study, we examined whether experience in a different activity, hip hop dance, is also linked to cognitive abilities connected with STEM skills as well as social cognition ability...
2017: PloS One
https://www.readbyqxmd.com/read/28122770/factor-structure-of-impact%C3%A2-in-adolescent-student-athletes
#16
Paul B Gerrard, Grant L Iverson, Joseph E Atkins, Bruce A Maxwell, Ross Zafonte, Philip Schatz, Paul D Berkner
OBJECTIVE: ImPACT(®) (Immediate Post-Concussion Assessment and Cognitive Testing) is a computerized neuropsychological screening battery, which is widely used to measure the acute effects of sport-related concussion and to monitor recovery from injury. This study examined the factor structure of ImPACT(®) in several samples of high school student athletes. We hypothesized that a 2-factor structure would be present in all samples. METHOD: A sample of 4,809 adolescent student athletes was included, and subgroups with a history of treatment for headaches or a self-reported history of learning problems or attention-deficit hyperactivity disorder were analyzed separately...
February 2017: Archives of Clinical Neuropsychology: the Official Journal of the National Academy of Neuropsychologists
https://www.readbyqxmd.com/read/28095083/physiological-capacity-and-training-routines-of-elite-cross-country-skiers-approaching-the-upper-limits-of-human-endurance
#17
Øyvind Sandbakk, Hans-Christer Holmberg
Cross-country skiing is one of the most demanding of endurance sports, involving protracted competitions on varying terrain employing a variety of skiing techniques that require upper- and/or lower-body work to different extents. Through more effective training and extensive improvements in equipment and track preparation, the speed of cross-country ski races has increased more than that of any other winter Olympic sport and, in addition, new types of racing events have been introduced. To a certain extent this has altered the optimal physiological capacity required to win and the training routines of successful skiers have evolved accordingly...
January 17, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28095069/the-evolution-of-champion-cross-country-skier-training-from-lumberjacks-to-professional-athletes
#18
Øyvind Sandbakk
Competitive cross-country (XC) skiing has traditions extending back to the mid-19th century, and was included as a men's event in the first Winter Games in 1924. Since then, tremendous improvements in equipment, track preparation, and knowledge about training have prompted greater increases in XC skiing speeds than in any other Olympic sport. In response, this commentary focuses on how the training of successful XC skiers has evolved, with interviews and training data from surviving Norwegian world and Olympic XC champions as primary sources...
January 17, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28071936/concussion-baseline-testing-preexisting-factors-symptoms-and-neurocognitive-performance
#19
Eric Hall, Jordan Cottle, Caroline Ketcham, Kirtida Patel, Kenneth P Barnes
CONTEXT:  Neurocognitive test scores are often considered an important aspect of concussion management. To best use these data, clinicians must understand potential factors that may influence baseline performance on these tests. OBJECTIVE:  To determine preexisting factors that may influence performance on the Immediate Post-Concussion Assessment and Cognitive Test (ImPACT). DESIGN:  Cross-sectional study. SETTING:  Research laboratory...
January 10, 2017: Journal of Athletic Training
https://www.readbyqxmd.com/read/28068152/effect-of-exposure-type-and-timing-of-injuries-in-division-i-college-football-a-4-year-single-program-analysis
#20
Michael K Krill, James R Borchers, Joshua T Hoffman, Rachel L Tatarski, Timothy E Hewett
BACKGROUND: Football players compete with a high risk of injury due to the sport. With the recent efforts to improve safety, the National Collegiate Athletic Association (NCAA) established new terminology to clearly define exposure types and reduce the number of high contact exposures. OBJECTIVES: To compare football injury rates (IR) with a focus on game versus practice, time in season of injury, mechanism of injury and utilizing recent exposure types defined by the NCAA (live contact, full-pads and non-contact)...
January 19, 2017: Physician and Sportsmedicine
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