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https://www.readbyqxmd.com/read/28632066/differences-in-trunk-and-thigh-muscle-strength-endurance-and-thickness-between-elite-sailors-and-non-sailors
#1
Bernd Friesenbichler, Julia F Item-Glatthorn, Fabian Neunstöcklin, Nicola C Casartelli, Gaël Guilhem, Nicola A Maffiuletti
Dinghy sailors lean their upper body over the windward side of the boat ('hiking') to keep the boat's balance and maximise its speed. Sustaining the hiking position is essential for competitive performance and this study examined sport-specific differences of muscles relevant for hiking in elite sailors. Knee extensor muscle strength as well as trunk muscle strength, muscle endurance and muscle thickness were assessed in elite dinghy sailors (n = 15) and compared to matched, non-sailing controls (n = 15)...
March 1, 2017: Sports Biomechanics
https://www.readbyqxmd.com/read/28632061/the-effect-of-unilateral-arm-swing-motion-on-lower-extremity-running-mechanics-associated-with-injury-risk
#2
Cristine Agresta, Christian R Ward, W Geoffrey Wright, Carole A Tucker
Many field sports involve equipment that restricts one or both arms from moving while running. Arm swing during running has been examined from a biomechanical and physiologic perspective but not from an injury perspective. Moreover, only bilateral arm swing suppression has been studied with respect to running. The purpose of this study was to determine the influence of running with one arm restrained on lower extremity mechanics associated with running or sport-related injury. Fifteen healthy participants ran at a self-selected speed with typical arm swing, with one arm restrained and with both arms restrained...
February 28, 2017: Sports Biomechanics
https://www.readbyqxmd.com/read/28609119/risk-factors-for-tear-progression-in-symptomatic-rotator-cuff-tears-a-prospective-study-of-174-shoulders
#3
Nobuyuki Yamamoto, Mitsuyoshi Mineta, Jun Kawakami, Hirotaka Sano, Eiji Itoi
BACKGROUND: The risk factors for tear progression in symptomatic rotator cuff tears have not been clarified yet. It is important for orthopaedic surgeons to know the natural course of tear progression when nonoperative management is to be chosen. HYPOTHESIS: Tears in younger patients, high-activity patients, or heavy laborers would progress in size more than those in older patients, low-activity patients, or light laborers. STUDY DESIGN: Case-control study; Level of evidence, 3...
June 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28578541/anthropometric-and-physical-qualities-of-elite-male-youth-rugby-league-players
#4
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/28570489/possible-hormone-predictors-of-physical-performance-in-adolescent-team-sport-athletes
#5
Alanna C Martin, Ian T Heazlewood, Cecilia M Kitic, Isabelle Lys, Liam Johnson
The research aim of this study was to determine possible hormone predictors of physical performance in adolescent team sport athletes. Saliva samples were collected immediately prior to performance testing sessions from 114 state squad athletes (77 male, 37 female) participating in either Australian football, basketball, hockey, or netball. Participants completed tests of aerobic and anaerobic capacity, agility, power and speed. Samples were collected over 22 months at quarterly, six-monthly and/or yearly intervals depending on the testing schedule of the athlete...
May 30, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28560098/sports-training-enhances-visuo-spatial-cognition-regardless-of-open-closed-typology
#6
Ting-Yu Chueh, Chung-Ju Huang, Shu-Shih Hsieh, Kuan-Fu Chen, Yu-Kai Chang, Tsung-Min Hung
The aim of this study was to investigate the effects of open and closed sport participation on visuo-spatial attention and memory performance among young adults. Forty-eight young adults-16 open-skill athletes, 16 closed-skill athletes, and 16 non-athletes controls-were recruited for the study. Both behavioral performance and event-related potential (ERP) measurement were assessed when participants performed non-delayed and delayed match-to-sample task that tested visuo-spatial attention and memory processing...
2017: PeerJ
https://www.readbyqxmd.com/read/28557852/analysis-of-high-intensity-skating-in-top-class-ice-hockey-match-play-in-relation-to-training-status-and-muscle-damage
#7
Erik Lignell, Dan Fransson, Peter Krustrup, Magni Mohr
We examined high-intensity activities in a top-class ice-hockey game and the effect of training status. Male ice-hockey players (n=36) from the NHL participated. Match-analysis was performed during a game and physical capacity was assessed by a submaximal Yo-Yo Intermittent Recovery Ice-hockey test, level 1 (YYIR1-IHSUB). Venous blood samples were collected 24-h post-game to determine markers of muscle damage. Players performed 119±8 and 31±3 m·min of high-intensity and sprint-skating, respectively, during a game...
May 23, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28552947/relationship-of-mechanical-impact-magnitude-to-neurologic-dysfunction-severity-in-a-rat-traumatic-brain-injury-model
#8
Tsung-Hsun Hsieh, Jing-Wei Kang, Jing-Huei Lai, Ying-Zu Huang, Alexander Rotenberg, Kai-Yun Chen, Jia-Yi Wang, Shu-Yen Chan, Shih-Ching Chen, Yung-Hsiao Chiang, Chih-Wei Peng
OBJECTIVE: Traumatic brain injury (TBI) is a major brain injury type commonly caused by traffic accidents, falls, violence, or sports injuries. To obtain mechanistic insights about TBI, experimental animal models such as weight-drop-induced TBI in rats have been developed to mimic closed-head injury in humans. However, the relationship between the mechanical impact level and neurological severity following weight-drop-induced TBI remains uncertain. In this study, we comprehensively investigated the relationship between physical impact and graded severity at various weight-drop heights...
2017: PloS One
https://www.readbyqxmd.com/read/28542091/normative-data-for-critical-speed-and-d-for-high-level-male-rugby-players
#9
Mark Kramer, Ida E Clark, Nick Jamnick, Cody Strom, Robert W Pettitt
The critical speed (CS) concept helps characterize the aerobic and anaerobic fitness of an athlete. Rugby players should hypothetically have modest CS values but extremely high curvature constant (D') values, yet, normative data are currently unavailable. To develop normative data of CS and D' for high-level male rugby players, a total of 30 male rugby players, were recruited from the Eastern Cape of South Africa. All subjects performed the running 3-min all-out exercise test (3 MT) using global positioning system (GPS) technology to determine CS and D'...
March 8, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28541413/the-influence-of-the-apolipoprotein-e-apoe-gene-on-subacute-post-concussion-neurocognitive-performance-in-college-athletes
#10
Victoria C Merritt, Amanda R Rabinowitz, Peter A Arnett
Objective: The purpose of this study was to determine whether the ε4 allele of the APOE gene influences neurocognitive outcome following sports-related concussion. It was hypothesized that participants with an ε4 allele would show poorer neurocognitive performance and greater neurocognitive variability than those without an ε4 allele. Method: Participants included 57 concussed collegiate athletes (77.2% male) who participated in a concussion management program at a large university...
May 24, 2017: Archives of Clinical Neuropsychology: the Official Journal of the National Academy of Neuropsychologists
https://www.readbyqxmd.com/read/28538304/a-performance-analysis-of-a-stand-up-paddle-board-marathon-race
#11
Ben L Schram, Wayne A Hing, Mike Climstein, James W Furness
Stand-up paddle boarding (SUP) is a rapidly growing sport and recreational activity in which little scientific research exists. A review of the literature failed to identify a single article pertaining to the physiological demands of SUP competition. The purpose of this study was to conduct a performance analysis of a national-level SUP marathon race. Ten elite SUP athletes (6 male and 4 female athletes) were recruited from the Stand Up Paddle Surfing Association of Australia to have their race performance in the Australian Titles analyzed...
June 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28538297/effect-of-game-design-goal-type-and-player-numbers-on-the-physiological-and-physical-demands-of-hurling-specific-small-sided-games
#12
Shane Malone, Kieran D Collins
The current study examined the effect that game design modification, goal type, and player numbers on the running performance and physiological demands of small-sided hurling games (SSG). Forty-eight hurling players (age, 25.5 ± 3.2 years; height, 178.9 ± 3.2 cm; body mass, 78.5 ± 4.5 kg) performed 4 types of SSG (possession [P], normal play [NP], regular goals [RG] and small goals [SG]) in 4-a-side, 5-a-side, and 6-a-side formats. Heart rate (Polar Electro Oy) and global positioning system technology (VX Sport, 4-Hz, Lower Hutt) were used to analyze the physical and physiological differences between SSG...
June 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28538294/effects-of-different-combinations-of-strength-power-and-plyometric-training-on-the-physical-performance-of-elite-young-soccer-players
#13
Ronaldo Kobal, Irineu Loturco, Renato Barroso, Saulo Gil, Rogério Cuniyochi, Carlos Ugrinowitsch, Hamilton Roschel, Valmor Tricoli
The combination of strength (ST) and plyometric training (PT) has been shown to be effective for improving sport-specific performance. However, there is no consensus about the most effective way to combine these methods in the same training session to produce greater improvements in neuromuscular performance of soccer players. Thus, the purpose of this study was to compare the effects of different combinations of ST and PT sequences on strength, jump, speed, and agility capacities of elite young soccer players...
June 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28535099/do-sideline-concussion-assessments-predict-subsequent-neurocognitive-impairment-after-sport-related-concussion
#14
Alicia Sufrinko, Jamie McAllister-Deitrick, Melissa Womble, Anthony Kontos
CONTEXT:   Comprehensive, multi-domain assessment is the standard of care after sport-related concussion. However, the relationship between performance on sideline concussion-assessment tools and in-office computerized neurocognitive testing has received little attention, and the prognostic utility of sideline measures is unknown. OBJECTIVE:   To evaluate concurrent impairment on commonly used concussion measures 24 to 48 hours postinjury while also determining the predictive utility of sideline measures on computerized neurocognitive testing in the acute to subacute recovery periods postinjury...
May 23, 2017: Journal of Athletic Training
https://www.readbyqxmd.com/read/28530528/objectifying-tactics-athlete-and-race-variability-in-elite-short-track-speed-skating
#15
Marco J Konings, Florentina J Hettinga
PURPOSE: To objectively capture and understand tactical considerations in a race, we explored whether race-to-race variation of an athlete and the variation of competitors within a race could provide insight into how and when athletes modify their pacing decisions in response to other competitors. METHODS: Lap times of elite 500, 1000 and 1500 m short-track speed skating competitions between 2011-2016 (n=6965 races) were collected. Log-transformed lap and finishing times were analyzed with mixed linear models...
May 22, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28500080/displaced-middle-third-clavicle-fracture-management-in-sport-still-a-challenge-in-2018-should-you-call-the-surgeon-to-speed-return-to-play
#16
EDITORIAL
Greg A Robertson, Alexander M Wood, Christopher W Oliver
No abstract text is available yet for this article.
May 12, 2017: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/28499343/knee-loading-deficits-during-dynamic-tasks-in-individuals-following-acl-reconstruction
#17
Kristamarie A Pratt, Susan M Sigward
Study Design Controlled laboratory study, cross-sectional. Background Well documented deficits in sagittal plane knee loading, during dynamic tasks indicate individuals limit the magnitude of knee loading following anterior cruciate ligament reconstruction (ACLR). It is unknown how these individuals modulate the speed of knee flexion during loading, which is particularly important as they progress to running during rehabilitation. Objective To investigate how individuals following anterior cruciate ligament reconstruction perform dynamic knee loading tasks compared to healthy controls...
May 12, 2017: Journal of Orthopaedic and Sports Physical Therapy
https://www.readbyqxmd.com/read/28497321/predicting-cumulative-and-maximum-brain-strain-measures-from-hybridiii-head-kinematics-a-combined-laboratory-study-and-post-hoc-regression-analysis
#18
Brooklynn M Knowles, Christopher R Dennison
Due to growing concern on brain injury in sport, and the role that helmets could play in preventing brain injury caused by impact, biomechanics researchers and helmet certification organizations are discussing how helmet assessment methods might change to assess helmets based on impact parameters relevant to brain injury. To understand the relationship between kinematic measures and brain strain, we completed hundreds of impacts using a 50th percentile Hybrid III head-neck wearing an ice hockey helmet and input three-dimensional impact kinematics to a finite element brain model called the Simulated Injury Monitor (SIMon) (n = 267)...
May 11, 2017: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/28493344/recreational-sporting-activity-vehicle-related-deaths
#19
Samuel P Prahlow, Andrew Renner, Abigail J Grande, Joyce deJong, Joseph A Prahlow
Deaths occurring in the setting of nonprofessional, vehicle-related, recreational sporting activities occurring on land or in water during warm or winter months represent a diverse group of cases. These deaths tend to involve scenarios where the participants are purposefully attempting to enjoy themselves prior to experiencing sudden, catastrophic accidents resulting in lethal outcomes. Ultimately, many of the deaths are related to the high speed at which these vehicle-related activities normally occur. Three broad categories of factors may play contributory roles in death: human factors, vehicle factors, and environmental factors...
May 11, 2017: Journal of Forensic Sciences
https://www.readbyqxmd.com/read/28489656/consequences-of-traumatic-brain-injury-in-professional-american-football-players-a-systematic-review-of-the-literature
#20
Bodil C Vos, Karen Nieuwenhuijsen, Judith K Sluiter
OBJECTIVE: The purpose of this study was to systematically review the literature for the consequences Traumatic brain injury (TBI) has on cognitive, psychological, physical, and sports-related functioning in professional American Football players. DATA SOURCES: We performed a systematic search in 2 databases, PubMed and SPORTDiscus, to obtain literature from January 1990 to January 2015. To be eligible for inclusion, a study had to examine the relationship between TBI and the consequences for several aspects of functioning in professional American football players older than 18 years...
May 9, 2017: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
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