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https://www.readbyqxmd.com/read/29340001/neuromuscular-control-during-the-bench-press-movement-in-an-elite-disabled-and-able-bodied-athlete
#1
Artur Gołaś, Anna Zwierzchowska, Adam Maszczyk, Michał Wilk, Petr Stastny, Adam Zając
The disabled population varies significantly in regard to physical fitness, what is conditioned by the damage to the locomotor system. Recently there has been an increased emphasis on the role of competitive sport in enhancing health and the quality of life of individuals with disability. One of the sport disciplines of Paralympics is the flat bench press. The bench press is one of the most popular resistance exercises used for the upper body in healthy individuals. It is used not only by powerlifters, but also by athletes in most strength-speed oriented sport disciplines...
December 2017: Journal of Human Kinetics
https://www.readbyqxmd.com/read/29324408/assessing-dynamic-balance-performance-during-exergaming-based-on-speed-and-curvature-of-body-movements
#2
Venustiano Soancatl Aguilar, Jasper J van de Gronde, Claudine J C Lamoth, Natasha M Maurits, Jos B T M Roerdink
Improving balance performance among the elderly is of utmost importance because of the increasing number of injuries and fatalities caused by fall incidences. Digital games controlled by body movements (exergames) have been proposed as a way to improve balance among older people. However, the assessment of balance performance in real-time during exergaming remains a challenging task. This assessment could be used to provide instantaneous feedback and automatically adjust the exergame difficulty. Such features could potentially increase the motivation of the player, thus augmenting the effectiveness of exergames...
January 2018: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/29302753/a-comparison-between-the-force-velocity-relationships-of-unloaded-and-sled-resisted-sprinting-single-vs-multiple-trial-methods
#3
Matt R Cross, Pierre Samozino, Scott R Brown, Jean-Benoît Morin
PURPOSE: We sought to compare force-velocity relationships developed from unloaded sprinting acceleration to that compiled from multiple sled-resisted sprints. METHODS: Twenty-seven mixed-code athletes performed six to seven maximal sprints, unloaded and towing a sled (20-120% of body-mass), while measured using a sports radar. Two methods were used to draw force-velocity relationships for each athlete: A multiple trial method compiling kinetic data using pre-determined friction coefficients and aerodynamic drag at maximum velocity from each sprint; and a validated single trial method plotting external force due to acceleration and aerodynamic drag and velocity throughout an acceleration phase of an unloaded sprint (only)...
January 4, 2018: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/29288709/collision-of-the-glass-shards-with-the-eye-a-computational-fluid-structure-interaction-model
#4
Alireza Karimi, Reza Razaghi, Hasan Biglari, Toshihiro Sera, Susumu Kudo
The main stream of blunt trauma injuries has been reported to be related to the automobile crashes, sporting activities, and military operations. Glass shards, which can be induced due to car accident, earthquake, gunshot, etc., might collide with the eye and trigger substantial scarring and, consequently, permanently affect the vision. The complications as a result of the collision with the eye and its following injuries on each component of the eye are difficult to be diagnosed. The objective of this study was to employ a Three-Dimensional (3D) computational Fluid-Structure Interaction (FSI) model of the human eye to assess the results of the glass shards collision with the eye...
December 27, 2017: Journal of Chemical Neuroanatomy
https://www.readbyqxmd.com/read/29288436/the-relationships-between-internal-and-external-measures-of-training-load-and-intensity-in-team-sports-a-meta-analysis
#5
REVIEW
Shaun J McLaren, Tom W Macpherson, Aaron J Coutts, Christopher Hurst, Iain R Spears, Matthew Weston
BACKGROUND: The associations between internal and external measures of training load and intensity are important in understanding the training process and the validity of specific internal measures. OBJECTIVES: We aimed to provide meta-analytic estimates of the relationships, as determined by a correlation coefficient, between internal and external measures of load and intensity during team-sport training and competition. A further aim was to examine the moderating effects of training mode on these relationships...
December 29, 2017: Sports Medicine
https://www.readbyqxmd.com/read/29283421/automatic-classification-of-sub-techniques-in-classical-cross-country-skiing-using-a-machine-learning-algorithm-on-micro-sensor-data
#6
Ole Marius Hoel Rindal, Trine M Seeberg, Johannes Tjønnås, Pål Haugnes, Øyvind Sandbakk
The automatic classification of sub-techniques in classical cross-country skiing provides unique possibilities for analyzing the biomechanical aspects of outdoor skiing. This is currently possible due to the miniaturization and flexibility of wearable inertial measurement units (IMUs) that allow researchers to bring the laboratory to the field. In this study, we aimed to optimize the accuracy of the automatic classification of classical cross-country skiing sub-techniques by using two IMUs attached to the skier's arm and chest together with a machine learning algorithm...
December 28, 2017: Sensors
https://www.readbyqxmd.com/read/29276071/enhancement-of-force-patterns-classification-based-on-gaussian-distributions
#7
Thomas Ertelt, Ilja Solomonovs, Thomas Gronwald
Description of the patterns of ground reaction force is a standard method in areas such as medicine, biomechanics and robotics. The fundamental parameter is the time course of the force, which is classified visually in particular in the field of clinical diagnostics. Here, the knowledge and experience of the diagnostician is relevant for its assessment. For an objective and valid discrimination of the ground reaction force pattern, a generic method, especially in the medical field, is absolutely necessary to describe the qualities of the time-course...
December 13, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/29248350/effectiveness-of-kinesiology-tape-on-sports-performance-abilities-in-athletes-a-systematic-review
#8
REVIEW
Jennifer C Reneker, Lisa Latham, Ryan McGlawn, Matthew R Reneker
OBJECTIVE: Establish the effectiveness of kinesiology tape (KT) on sports performance abilities compared to that of other tapes or no tape with consideration to the application methodology, timeframe, and outcome measurement. METHODS: PubMed, Embase, and PEDro databases were systematically searched. The following inclusion criteria were applied: 1) participants were healthy athletes, 2) compared any brand of dynamic KT to other types of tape (sham or therapeutic) and/or no tape, 3) measured some construct of functional sports performance, 4) involved randomization...
October 9, 2017: Physical Therapy in Sport
https://www.readbyqxmd.com/read/29245218/bilateral-anterior-shoulder-dislocation-as-a-result-of-manipulation-a-case-report
#9
Kuan-Lin Chen, Sen-Yung Liu, Ta-Sen Wei
RATIONALE: Bilateral anterior shoulder dislocation is clinically rare and has been reported to be related to high-speed sports. PATIENT CONCERNS: A 76-year-old woman presented with bilateral shoulders pain after traditional Chinese manipulation. DIAGNOSES: She was diagnosed with bilateral anterior dislocations, and a closed reduction was immediately performed. INTERVENTION: The patient was referred for rehabilitation 3 days later, and bilateral rotator cuff injuries were identified from musculoskeletal ultrasound...
December 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29238406/real-time-field-sports-scene-classification-using-colour-and-frequency-space-decompositions
#10
Rafal Kapela, Kevin McGuinness, Noel E O'Connor
This paper presents a novel approach to recognize a scene presented in an image with specific application to scene classification in field sports video. We propose different variants of the algorithm ranging from bags of visual words to the simplified real-time implementation, that takes only the most important areas of similar colour into account. All the variants feature similar accuracy which is comparable to very well-known image indexing techniques like SIFT or HoGs. For the comparison purposes, we also developed a specific database which is now available online...
2017: Journal of Real-Time Image Processing
https://www.readbyqxmd.com/read/29238243/analysis-of-time-motion-and-heart-rate-in-elite-male-and-female-beach-handball
#11
Basilio Pueo, Jose M Jimenez-Olmedo, Alfonso Penichet-Tomas, Manuel Ortega Becerra, Jose J Espina Agullo
Beach handball is a spectacular new team sport; however, scientific knowledge about the demands in beach handball is very low. Consequently, the aim of this study was to analyze the physical demands of elite beach handball players by means of time-motion analysis with GPS technology and physiological response with Heart Rate (HR). Both male (n = 12) and female (n = 12) players from the Spanish Beach Handball National Team were recruited for this study. The sample consisted in four matches of two 10-min periods each...
December 2017: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/29225767/pink-cricket-balls-through-rose-tinted-glasses-enhancing-interceptive-timing
#12
Joshua M Adie, Derek H Arnold
Cricket is a popular but potentially dangerous sport. It is played with a hard ball that can travel at great speeds. Serious injuries, including fatalities, have occurred when balls have struck participants. The game is traditionally played during daylight with a dark red ball, but recent games have been played during the day and at night using a 'pink' ball. We have reported data that seemed to justify concerns raised regarding the visibility of these new pink balls, as they were revealed to have a very low luminance contrast against pertinent backgrounds during twilight...
November 2017: I-Perception
https://www.readbyqxmd.com/read/29223876/joint-moments-required-to-hold-a-posture-while-somersaulting
#13
Joanne Mikl
A pure somersault is a key skill in diving and gymnastics, and involves rotation about the transverse axis of the body. As the rotational speed increases the effort required to maintain a specified posture increases. This paper derives equations for the joint moments required for an athlete to hold three sport specific postures as a function of rotational speed. The joint moment is related to the isometric muscular strength and is the limiting factor of an athlete in their ability to hold a fixed posture while somersaulting...
December 7, 2017: Human Movement Science
https://www.readbyqxmd.com/read/29213057/a-catch-up-illusion-arising-from-a-distance-dependent-perception-bias-in-judging-relative-movement
#14
Tobias Meilinger, Bärbel Garsoffky, Stephan Schwan
The perception of relative target movement from a dynamic observer is an unexamined psychological three body problem. To test the applicability of explanations for two moving bodies participants repeatedly judged the relative movements of two runners chasing each other in video clips displayed on a stationary screen. The chased person always ran at 3 m/s with an observer camera following or leading at 4.5, 3, 1.5 or 0 m/s. We harmonized the chaser speed in an adaptive staircase to determine the point of subjective equal movement speed between runners and observed (i) an underestimation of chaser speed if the runners moved towards the viewer, and (ii) an overestimation of chaser speed if the runners moved away from the viewer, leading to a catch-up illusion in case of equidistant runners...
December 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29209417/do-athletes-alter-their-running-mechanics-after-an-achilles-tendon-rupture
#15
Daniel Jandacka, Julia Freedman Silvernail, Jaroslav Uchytil, David Zahradnik, Roman Farana, Joseph Hamill
Background: Over the past thirty years, there has been dramatic increase in incidence of Achilles tendon rupture in the athletic population. The purpose of this study was to compare the lower extremity mechanics of Achilles tendon ruptured runners with healthy controls. Methods: The participants with a past history of an Achilles tendon repair (n = 11) and healthy control (n = 11) subgroups were matched on sex, age, type of regular physical activity, mass, height, footfall pattern and lateral dominancy...
2017: Journal of Foot and Ankle Research
https://www.readbyqxmd.com/read/29192842/validity-of-an-ultra-wideband-local-positioning-system-to-measure-locomotion-in-indoor-sports
#16
F R Serpiello, W G Hopkins, S Barnes, J Tavrou, G M Duthie, R J Aughey, K Ball
The validity of an Ultra-wideband (UWB) positioning system was investigated during linear and change-of-direction (COD) running drills. Six recreationally-active men performed ten repetitions of four activities (walking, jogging, maximal acceleration, and 45º COD) on an indoor court. Activities were repeated twice, in the centre of the court and on the side. Participants wore a receiver tag (Clearsky T6, Catapult Sports) and two reflective markers placed on the tag to allow for comparisons with the criterion system (Vicon)...
December 1, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/29189585/muscle-damage-and-metabolic-responses-to-repeated-sprint-running-with-and-without-deceleration
#17
Clare L Minahan, Daniel P Poke, Jaime Morrison, Phillip M Bellinger
This study aimed to determine whether repeated-sprint running with deceleration aggravates markers of muscle damage or delays the recovery of performance compared to repeated-sprint running without deceleration. Fourteen male team-sport athletes performed two randomly ordered testing sessions on a non-motorised treadmill with one session requiring participants to decelerate (TMd) within 4 s before stopping, or immediately step to the side of the treadmill belt at the completion of each sprint (TMa). Peak and mean velocities, speed decrement, blood lactate concentrations and oxygen uptake were monitored during the repeated-sprint running protocols...
November 16, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29187349/isokinetic-strength-assessment-offers-limited-predictive-validity-for-detecting-risk-of-future-hamstring-strain-in-sport-a-systematic-review-and-meta-analysis
#18
REVIEW
Brady Green, Matthew N Bourne, Tania Pizzari
OBJECTIVE: To examine the value of isokinetic strength assessment for predicting risk of hamstring strain injury, and to direct future research into hamstring strain injuries. DESIGN: Systematic review. DATA SOURCES: Database searches for Medline, CINAHL, Embase, AMED, AUSPORT, SPORTDiscus, PEDro and Cochrane Library from inception to April 2017. Manual reference checks, ahead-of-press and citation tracking. ELIGIBILITY CRITERIA FOR SELECTING STUDIES: Prospective studies evaluating isokinetic hamstrings, quadriceps and hip extensor strength testing as a risk factor for occurrence of hamstring muscle strain...
November 29, 2017: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/29185788/risk-factors-for-motorcycle-loss-of-control-crashes
#19
Dan Wu, Martine Hours, Jean-Louis Martin
OBJECTIVE: The present paper identifies and assesses the effect of critical factors on the risk of motorcycle loss-of-control (LOC) crashes. METHOD: Data come from a French project on road crashes, which comprises all fatal road crashes and a random sample of 1/20th of non-fatal crashes in France in 2011, based on police reports. A case-control study was carried out on a sample of 903 crashes for 444 LOC motorcycle riders (case) and 470 non-LOC and non-responsible motorcycle riders (control)...
November 29, 2017: Traffic Injury Prevention
https://www.readbyqxmd.com/read/29181250/the-efficacy-of-angle-matched-isokinetic-knee-flexor-and-extensor-strength-parameters-in-predicting-agility-test-performance
#20
Matt Greig, James Naylor
Background: Agility is a fundamental performance element in many sports, but poses a high risk of injury. Hierarchical modelling has shown that eccentric hamstring strength is the primary determinant of agility performance. Purpose: The purpose of this study was to investigate the relationship between knee flexor and extensor strength parameters and a battery of agility tests. Study Design: Controlled laboratory study. Methods: Nineteen recreational intermittent games players completed an agility battery and isokinetic testing of the eccentric knee flexors (eccH) and concentric knee extensors (conQ) at 60, 180 and 300°·s-1...
October 2017: International Journal of Sports Physical Therapy
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