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Athlete, Performance

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https://www.readbyqxmd.com/read/29692955/the-reliability-of-vertical-jump-tests-between-the-vertec-and-my-jump-phone-application
#1
Vanessa R Yingling, Dimitri A Castro, Justin T Duong, Fiorella J Malpartida, Justin R Usher, Jenny O
Background: The vertical jump is used to estimate sports performance capabilities and physical fitness in children, elderly, non-athletic and injured individuals. Different jump techniques and measurement tools are available to assess vertical jump height and peak power; however, their use is limited by access to laboratory settings, excessive cost and/or time constraints thus making these tools oftentimes unsuitable for field assessment. A popular field test uses the Vertec and the Sargent vertical jump with countermovement; however, new low cost, easy to use tools are becoming available, including the My Jump iOS mobile application (app)...
2018: PeerJ
https://www.readbyqxmd.com/read/29690827/cross-cultural-adaptation-and-measurement-properties-of-the-brazilian-portuguese-version-of-the-victorian-institute-of-sport-assessment-achilles-visa-a-questionnaire
#2
Gabriel Nunes de Mesquita, Marcela Nicácio Medeiros de Oliveira, Amanda Ellen Rodrigues Matoso, Alberto Galvão de Moura Filho, Rodrigo Ribeiro de Oliveira
Study Design Clinical measurement study. Background Achilles tendon disorders are very common among athletes and it is important to objectively measure symptoms and functional limitations related to Achilles tendinopathy using outcome measures that have been validated in the language of the target population. Objectives To perform a cross-cultural adaptation and to evaluate the measurement properties of the Brazilian version of the Victorian Institute of Sport Assessment-Achilles (VISA-A) questionnaire. Methods We adapted the VISA-A questionnaire to Brazilian Portuguese (VISA-A-Br)...
April 24, 2018: Journal of Orthopaedic and Sports Physical Therapy
https://www.readbyqxmd.com/read/29690820/effects-of-concussions-on-visually-guided-motor-actions-a-literature-review
#3
Christopher Fueger, Wendy E Huddleston
Athletes must be able to successfully navigate the soccer pitch or hockey rink to win the game, requiring maximal cognitive resources to successfully compete. Concussions potentially deplete these resources, and the long-term impact of concussions on an individual's goal-directed visually guided behavior continues to elude the scientific community. While the acute effects on cognition and the motor system have been elucidated elsewhere, long-term effects on performance have been less clear. Additionally, most investigations into long-term postinjury motor behaviors have focused on balance and gait, with little focus on functional upper extremity movements...
April 24, 2018: Journal of Clinical and Experimental Neuropsychology
https://www.readbyqxmd.com/read/29689184/development-and-pilot-testing-of-the-dual-task-screen-in-healthy-adolescents
#4
Jaclyn Stephens, Rachel Nicholson, Beth Slomine, Stacy Suskauer
Athletes with mild traumatic brain injury (mTBI) should refrain from high-risk activities until recovered (symptom free and cognitive and physical exam findings normalize). Studies have suggested that this examination may not be sufficiently sensitive because dual-task paradigms, which typically assess motor performance while a person simultaneously completes a distractor task, can detect residual deficits in athletes who otherwise appear recovered from mTBI. Paradigms used to date are time-intensive procedures conducted in laboratory settings...
May 2018: American Journal of Occupational Therapy: Official Publication of the American Occupational Therapy Association
https://www.readbyqxmd.com/read/29689075/test-retest-reliability-of-the-kinarm-end-point-robot-for-assessment-of-sensory-motor-and-neurocognitive-function-in-young-adult-athletes
#5
Cameron S Mang, Tara A Whitten, Madeline S Cosh, Stephen H Scott, J Preston Wiley, Chantel T Debert, Sean P Dukelow, Brian W Benson
BACKGROUND: Current assessment tools for sport-related concussion are limited by a reliance on subjective interpretation and patient symptom reporting. Robotic assessments may provide more objective and precise measures of neurological function than traditional clinical tests. OBJECTIVE: To determine the reliability of assessments of sensory, motor and cognitive function conducted with the KINARM end-point robotic device in young adult elite athletes. METHODS: Sixty-four randomly selected healthy, young adult elite athletes participated...
2018: PloS One
https://www.readbyqxmd.com/read/29687744/differences-in-spatiotemporal-parameters-during-200-m-sprint-between-bilateral-and-unilateral-transfemoral-amputees
#6
Hiroaki Hobara, Sakiko Saito, Satoru Hashizume, Yuta Namiki, Yoshiyuki Kobayashi
BACKGROUND AND AIM: Although Paralympic T42 class Men's 200 m sprints are currently competed by athletes with bilateral and unilateral transfemoral amputations, there may be performance differences between the groups. This study aimed to compare the spatiotemporal parameters of a 200-m sprint between bilateral and unilateral transfemoral amputees wearing running-specific prostheses. TECHNIQUE: We analyzed 29 races (nine sprinters) with bilateral or unilateral transfemoral amputations from publicly available Internet broadcasts...
April 1, 2018: Prosthetics and Orthotics International
https://www.readbyqxmd.com/read/29687688/impact-kinetics-associated-with-four-common-bilateral-plyometric-exercises
#7
Ethan Stewart, Thomas Kernozek, Hsien-Te Peng, Brian Wallace
BACKGROUND: This study quantified the peak vertical ground reaction force (VGRF), impulse, and average and instantaneous loading rates developed during bilateral plyometric exercises. METHODS: Fourteen collegiate male athletes performed four different bilateral plyometric exercises within a single testing session. Depth jumps from thirty, sixty and ninety centimeter heights (DJ30, DJ60, and DJ90, respectively), and a two consecutive jump exercise (2CJ), were randomly performed...
April 20, 2018: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29687687/body-composition-and-somatotypes-of-male-zimbabwean-premier-league-football-referees
#8
Morris Banda, Heinrich W Grobbelaar, Elmarie Terblanche
BACKGROUND: Elite athletes need to optimise their body composition to deliver world class performances and this argument could be extended to elite referees as well. Unfortunately, there is a scarcity of body composition information among football referees. AIM: The aim of the study was to determine and compare the body composition and somatotypes of male football referees and assistant referees who officiated in the 2013 Zimbabwe Premier Football League. METHODS: Forty-one participants (21 referees, 20 assistant referees; 8 FIFA, 33 ZIFA licenced referees) with a mean age of 34...
April 20, 2018: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29687012/sex-based-differences-of-medial-collateral-ligament-and-anterior-cruciate-ligament-strains-with-cadaveric-impact-simulations
#9
Nathan D Schilaty, Nathaniel A Bates, Christopher V Nagelli, Aaron J Krych, Timothy E Hewett
Background: Female patients sustain noncontact knee ligament injuries at a greater rate compared with their male counterparts. The cause of these differences in the injury rate and the movements that load the ligaments until failure are still under dispute in the literature. Purpose/Hypotheses: This study was designed to determine differences in anterior cruciate ligament (ACL) and medial collateral ligament (MCL) strains between male and female cadaveric specimens during a simulated athletic task...
April 2018: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/29687011/incidence-of-elbow-ulnar-collateral-ligament-surgery-in-collegiate-baseball-players
#10
Marcus A Rothermich, Stan A Conte, Kyle T Aune, Glenn S Fleisig, E Lyle Cain, Jeffrey R Dugas
Background: Recent reports have highlighted the progressive increase in the incidence of ulnar collateral ligament (UCL) injuries to the elbow in baseball players of all levels. However, knowledge of the incidence and other epidemiological factors regarding UCL injuries, specifically in college baseball players, is currently lacking. Purpose: To evaluate, over a period of 1 year, the incidence of UCL injuries requiring surgery in National Collegiate Athletic Association (NCAA) Division I baseball programs...
April 2018: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/29686814/an-innovative-way-to-highlight-the-power-of-each-polymorphism-on-elite-athletes-phenotype-expression
#11
Valentina Contrò, Gabriella Schiera, Antonino Abbruzzo, Antonino Bianco, Alessandra Amato, Alessia Sacco, Alessandra Macchiarella, Antonio Palma, Patrizia Proia
The purpose of this study was to determine the probability of soccer players having the best genetic background that could increase performance, evaluating the polymorphism that are considered Performance Enhancing Polymorphism (PEPs) distributed on five genes: PPARα, PPARGC1A, NRF2, ACE e CKMM. Particularly, we investigated how each polymorphism works directly or through another polymorphism to distinguish elite athletes from non-athletic population. Sixty professional soccer players (age 22.5 ± 2.2) and sixty healthy volunteers (age 21...
January 12, 2018: European Journal of Translational Myology
https://www.readbyqxmd.com/read/29686813/resting-sympatho-vagal-balance-is-related-to-10-km-running-performance-in-master-endurance-athletes
#12
Angelo Cataldo, Antonino Bianco, Antonio Paoli, Dario Cerasola, Saverio Alagna, Giuseppe Messina, Daniele Zangla, Marcello Traina
Relationships between heart rate recovery after exercise (HRR, baseline heart rate variability measures (HRV), and time to perform a 10Km running trial (t10Km) were evaluated in "master" athletes of endurance to assess whether the measured indexes may be useful for monitoring the training status of the athletes. Ten "master" athletes of endurance, aged 40-60 years, were recruited. After baseline measures of HRV, the athletes performed a graded maximal test on treadmill and HRR was measured at 1 and 2 minutes from recovery...
January 12, 2018: European Journal of Translational Myology
https://www.readbyqxmd.com/read/29685837/outcomes-of-hip-arthroscopy-in-a-military-population-are-similar-to-those-in-the-civilian-population-matched-paired-analysis-at-2-years
#13
Jun-Il Yoo, Tae-Ho Lee, Jae-Yoon Kim, Jae-Hyung Kim, Yong-Chan Ha
PURPOSE: The purpose of this study was to compare the clinical outcomes, including the visual analog pain score, University of California Los Angeles activity, modified Harris hip score, and radiologic outcomes after hip arthroscopy in male patients whose symptoms developed during military services with those in a matched-pair control group of active young, nonmilitary patients at a minimum postoperative follow-up of 2 years. METHODS: From September 2009 to December 2014, 28 male patients with mechanical symptoms that developed during military service underwent hip arthroscopic surgery...
April 20, 2018: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/29685828/influence-of-cold-water-immersion-on-recovery-of-elite-triathletes-following-the-ironman-world-championship
#14
Rebecca L Stearns, Julie K Nolan, Robert A Huggins, Carl M Maresh, Colleen X Munõz, Kelly D Pagnotta, Brittanie M Volk, Douglas J Casa
OBJECTIVES: Cold water immersion (CWI) has been widely used for enhancing athlete recovery though its use following an Ironman triathlon has never been examined. The purpose of this paper is to determine the influence of CWI immediately following an Ironman triathlon on markers of muscle damage, inflammation and muscle soreness. DESIGN: Prospective cohort study. METHODS: Thirty three (22 male, 11 female), triathletes participating in the Ironman World Championships volunteered to participate (mean±SD: age=40±11years; height=174...
January 31, 2018: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/29685827/test-design-and-individual-analysis-in-wheelchair-rugby
#15
David S Haydon, Ross A Pinder, Paul N Grimshaw, William S P Robertson
OBJECTIVES: Use a task vehicle of sprint testing in wheelchair rugby (WCR) to explore the impact of small changes to test design using both group and individual analysis. DESIGN: Exploratory, repeated measures, on-court study METHOD: 25 national or international level wheelchair rugby players completed 5×5m sprints under two conditions: (i) an acceleration from standstill in their own time, and (ii) an 'active' start, simulating a key aspect of performance. Video analysis and accelerometer data were used to measure key kinematic and performance variables with a focus on the first three strokes...
April 7, 2018: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/29685173/dynamic-characteristics-of-oxygen-consumption
#16
Lin Ye, Ahmadreza Argha, Hairong Yu, Branko G Celler, Hung T Nguyen, Steven Su
BACKGROUND: Previous studies have indicated that oxygen uptake ([Formula: see text]) is one of the most accurate indices for assessing the cardiorespiratory response to exercise. In most existing studies, the response of [Formula: see text] is often roughly modelled as a first-order system due to the inadequate stimulation and low signal to noise ratio. To overcome this difficulty, this paper proposes a novel nonparametric kernel-based method for the dynamic modelling of [Formula: see text] response to provide a more robust estimation...
April 23, 2018: Biomedical Engineering Online
https://www.readbyqxmd.com/read/29683918/detection-of-persisting-concussion-effects-on-neuromechanical-responsiveness
#17
Gary B Wilkerson, Dustin C Nabhan, Chad J Prusmack, William J Moreau
PURPOSE: Assessment of various indices of neuromechanical responsiveness for association with concussion history. METHODS: An observational cohort study included 48 elite athletes (34 males: 23.8 ±4.4 years; 14 females: 25.4 ±4.5 years) who performed visuomotor reaction time (VMRT) tests involving rapid manual contact with illuminated target buttons that included 2 dual-task conditions: 1) simultaneous oral recitation of scrolling text (VMRT+ST) and 2) simultaneous verbal responses to identify the right or left direction indicated by the center arrow of the Eriksen flanker test (VMRT+FT)...
April 21, 2018: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/29683770/athletes-perceptions-of-coaching-competency-and-team-conflict-in-sport-teams-a-multilevel-analysis
#18
I González-Ponce, F M Leo, R Jiménez, D Sánchez-Oliva, H Sarmento, A Figueiredo, T García-Calvo
The purpose of this study was to examine the relationship between coaching competency and team conflict, at individual and team levels, over the season. The participants were professional female and male soccer players, who participated in the First and Second Division. A longitudinal study was performed. At Time 1, the sample of participants consisted of 581 soccer players aged between 15 and 39 years. At Time 2, 549 players were recruited from the original sample aged between 15 and 37 years. Finally, at Time 3, the sample comprised 576 players aged between 15 and 37 years...
April 23, 2018: European Journal of Sport Science
https://www.readbyqxmd.com/read/29681197/effect-of-carbohydrate-electrolyte-consumption-on-insulin-cortisol-hormones-and-blood-glucose-after-high-intensity-exercise
#19
Ahmet Mor, Yildirim Kayacan, Gokhan Ipekoglu, Erkal Arslanoglu
OBJECTIVE: This study aimed to examine the effect of CHO-E consumption after high-intensity exercise on insulin, cortisol hormones and blood glucose responses, which is important for performance and recovery in athletes. METHODS: Sixteen volunteers, male athletes, participated into this study. Athletes were divided into two groups as experiment (CHO-E) and placebo (PLA). Blood was taken from the athletes three times as basal, post-exercise (PE) and 2 h after ingestion of supplement (PS)...
April 21, 2018: Archives of Physiology and Biochemistry
https://www.readbyqxmd.com/read/29680982/the-second-case-of-a-young-man-with-l-arginine-induced-acute-pancreatitis
#20
Quentin Binet, Inès Dufour, Emmanuel Agneessens, Jean-Claude Debongnie, Tarik Aouattah, Angélique Covas, Jean-Charles Coche, Xavier De Koninck
BACKGROUND: Dietary supplementation of arginine has been used by numerous world-class athletes and professional bodybuilders over the past 30 years. L-Arginine indeed enhances muscular power and general performance via maintaining ATP level. However, L-arginine is also known to induce acute pancreatitis in murine models. CASE REPORT: We report the case of young man presenting with upper abdominal pain and increased serum lipase levels. Contrast-enhanced computed tomography confirms a mild acute pancreatitis...
April 21, 2018: Clinical Journal of Gastroenterology
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