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https://www.readbyqxmd.com/read/29330780/safety-in-mixed-martial-arts-a-7-year-review-of-cancelled-mma-bouts-in-calgary-alberta-during-the-pre-bout-medical-examination-period
#1
Gwynn Curran-Sills
BACKGROUND: Presently, there is no literature that examines the reasons for the cancellation of amateur or professional mixed martial arts (MMA) bouts. The purpose of this study was to review the circumstances that lead to the cancellation of MMA bouts by Calgary ringside physicians during the pre-bout examination period and to identify any emerging patterns that may guide the regulatoin of this sport. METHODS: The case-series  was constructed from the Calgary Combative Sports Commission pre-bout examination records and the medical records submitted by each athlete from January 2010 to December 2016...
January 12, 2018: Sports Medicine—Open
https://www.readbyqxmd.com/read/29324440/micro-patterned-graphene-based-sensing-skins-for-human-physiological-monitoring
#2
Long Wang, Kenneth J Loh, Wei-Hung Chiang, Kausik Manna
Ultrathin, flexible, conformal, and skin-like electronic transducers are emerging as promising candidates for noninvasive and nonintrusive human health monitoring. In this work, a wearable sensing membrane is developed by patterning a graphene-based solution onto ultrathin medical tapes, which can then be attached to the skin for monitoring human physiological parameters and physical activity. Here, the sensor is validated for monitoring finger bending/movements and for recognizing hand motion patterns, thereby demonstrating its future potential for evaluating athletic performance, physical therapy, and designing next-generation human-machine interfaces...
January 11, 2018: Nanotechnology
https://www.readbyqxmd.com/read/29323926/investigating-effects-of-sex-differences-and-prior-concussions-on-symptom-reporting-and-cognition-among-adolescent-soccer-players
#3
Brian L Brooks, Noah Silverberg, Bruce Maxwell, Rebekah Mannix, Ross Zafonte, Paul D Berkner, Grant L Iverson
BACKGROUND: There has been increasing concern regarding the possible effect of multiple concussions on the developing brain, especially for adolescent females. Hypothesis/Purpose: The objectives were to determine if there are differences in cognitive functioning, symptom reporting, and/or sex effects from prior concussions. In a very large sample of youth soccer players, it was hypothesized that (1) there would be no differences in cognitive test performance between those with and without prior concussions, (2) baseline preseason symptoms would be better predicted by noninjury factors than concussion history, and (3) males and females with prior concussions would not have differences in cognition or symptoms...
January 1, 2018: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/29321373/the-current-state-of-biomarkers-of-mild-traumatic-brain-injury
#4
REVIEW
Han Jun Kim, Jack W Tsao, Ansley Grimes Stanfill
Mild traumatic brain injury (mTBI) is a common occurrence, with over 3 million cases reported every year in the United States. While research into the underlying pathophysiology is ongoing, there is an urgent need for better clinical guidelines that allow more consistent diagnosis of mTBI and ensure safe return-to-play timelines for athletes, nonathletes, and military personnel. The development of a suite of biomarkers that indicate the pathogenicity of mTBI could lead to clinically useful tools for establishing both diagnosis and prognosis...
January 11, 2018: JCI Insight
https://www.readbyqxmd.com/read/29318177/injury-recurrence-among-high-school-athletes-in-the-united-states-a-decade-of-patterns-and-trends-2005-2006-through-2015-2016
#5
K Linnea Welton, Matthew J Kraeutler, Lauren A Pierpoint, Justin H Bartley, Eric C McCarty, R Dawn Comstock
Background: As participation in high school athletics increases, so does the number of adolescents experiencing sports-related injury. Understanding injury patterns is an important component to developing and evaluating prevention and rehabilitation programs. Purpose: To analyze recurrent injury rates and patterns among high school athletes, to compare recurrent injuries with new injuries, and to evaluate injury trends over time. Study Design: Descriptive epidemiology study...
January 2018: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/29318166/lower-limb-symmetry-comparison-of-muscular-power-between-dominant-and-nondominant-legs-in-healthy-young-adults-associated-with-single-leg-dominant-sports
#6
Alex Vaisman, Rodrigo Guiloff, Juan Rojas, Iris Delgado, David Figueroa, Rafael Calvo
Background: Achieving a symmetrical power performance (difference <15%) between lower limbs is generally recommended during sports rehabilitation. However, athletes in single-leg-dominant sports, such as professional soccer players, could develop significant asymmetry between their dominant and nondominant legs, such that symmetry does not act as a viable comparison. Purpose: To (1) compare maximal muscular power between the dominant and nondominant legs in healthy young adults, (2) evaluate the effect of a single-leg-dominant sport activity performed at the professional level, and (3) propose a parameter of normality for maximal power difference in the lower limbs of this young adult population...
December 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/29315573/the-athlete-s-paradoxpat
#7
Nathan E Wolins, Bettina Mittendorfer
Intramyocellular triglyceride (IMCTG) content is increased in people with obesity and insulin resistance and type 2 diabetes (T2D). The increase in IMCTG occurs before developing T2D, and the amount of IMCTG is directly correlated with the degree of insulin resistance. This article is protected by copyright. All rights reserved.
January 8, 2018: Journal of Physiology
https://www.readbyqxmd.com/read/29315348/knee-strength-ratios-in-competitive-female-athletes
#8
Jaroslaw Kabacinski, Michal Murawa, Krzysztof Mackala, Lechoslaw Bogdan Dworak
Knee strength ratios are related to the movement patterns, sport-specific training and knee injuries in athletes. The purpose of this study was to determine the ratios in the concentric isokinetic strength of the hamstrings and quadriceps and the isometric strength of the knee extensors. In female basketball players (n = 14) and female volleyball players (n = 12) were evaluated: the hamstrings to quadriceps peak torque ratio (H/Q) and side-to-side peak torque ratio (TR) for hamstrings and quadriceps; the ratio of the maximal bilateral strength to the summed maximal unilateral strength (B/U) and side-to-side maximal strength ratio (SR) for knee extensors...
2018: PloS One
https://www.readbyqxmd.com/read/29315106/zurich-to-berlin-where-are-we-now-with-the-concussion-in-sport-group
#9
Margaret E Pusateri, Brandon J Hockenberry, Christopher A McGrew
The Concussion in Sport Group recently published its highly anticipated fifth consensus statement on sports-related concussion. The latest iteration features a new organizational format-the "11 Rs" and has input from a wider range of health care professionals, organizations, and experts in the field from both the sport concussion area and from related areas outside of sport. The stated objective of this current document is to "build on the principles outlined in previous statements and develop further conceptual understanding of sports-related concussion...
January 2018: Current Sports Medicine Reports
https://www.readbyqxmd.com/read/29314871/normative-functional-performance-values-in-high-school-athletes-the-functional-pre-participation-evaluation-project
#10
James A Onate, Cambrie Starkel, Daniel R Clifton
CONTEXT:   The fourth edition of the Preparticipation Physical Evaluation recommends functional testing for the musculoskeletal portion of the examination; however, normative data across sex and grade level are limited.3 Establishing normative data can provide clinicians reference points with which to compare their patients, potentially aiding in the development of future injury-risk assessments and injury-mitigation programs. OBJECTIVE:   To establish normative functional performance and limb-symmetry data for high school-aged male and female athletes in the United States...
January 9, 2018: Journal of Athletic Training
https://www.readbyqxmd.com/read/29312844/new-insights-in-the-treatment-of-acromioclavicular-separation
#11
REVIEW
Christiaan J A van Bergen, Annelies F van Bemmel, Tjarco D W Alta, Arthur van Noort
A direct force on the superior aspect of the shoulder may cause acromioclavicular (AC) dislocation or separation. Severe dislocations can lead to chronic impairment, especially in the athlete and high-demand manual laborer. The dislocation is classified according to Rockwood. Types I and II are treated nonoperatively, while types IV, V and VI are generally treated operatively. Controversy exists regarding the optimal treatment of type III dislocations in the high-demand patient. Recent evidence suggests that these should be treated nonoperatively initially...
December 18, 2017: World Journal of Orthopedics
https://www.readbyqxmd.com/read/29309422/risk-assessment-of-the-onset-of-osgood-schlatter-disease-using-kinetic-analysis-of-various-motions-in-sports
#12
Gento Itoh, Hideyuki Ishii, Haruyasu Kato, Yasuharu Nagano, Hiroteru Hayashi, Hiroki Funasaki
BACKGROUND: Some studies have listed motions that may cause Osgood-Schlatter disease, but none have quantitatively assessed the load on the tibial tubercle by such motions. PURPOSES: To quantitatively identify the load on the tibial tubercle through a biomechanical approach using various motions that may cause Osgood-Schlatter disease, and to compare the load between different motions. METHODS: Eight healthy male subjects were included. They conducted 4 types of kicks with a soccer ball, 2 types of runs, 2 types of squats, 2 types of jump landings, 2 types of stops, 1 type of turn, and 1 type of cutting motion...
2018: PloS One
https://www.readbyqxmd.com/read/29303682/the-organised-chaos-of-english-adolescent-rugby-union-influence-of-weekly-match-frequency-on-the-variability-of-match-and-training-loads
#13
Padraic J Phibbs, Ben Jones, Gregory Roe, Dale Read, Joshua Darrall-Jones, Jonathon Weakley, Andrew Rock, Kevin Till
The aims of this study were to determine the variability of weekly match and training loads in adolescent rugby union players across a competitive season, and to investigate the effect of match frequency on load distribution across different activities. Internal match and training load data (i.e. session-rating of perceived exertion (sRPE)) were collected daily from 20 players from a regional academy across a 14-week season. Data were analysed using a mixed-effects linear model, and variability was reported as a coefficient of variation (CV)...
January 5, 2018: European Journal of Sport Science
https://www.readbyqxmd.com/read/29303400/the-sequence-of-prevention-for-musculoskeletal-injuries-among-recreational-basketballers-a-systematic-review-of-the-scientific-literature
#14
Özgür Kilic, Vivian van Os, Ellen Kemler, Maarten Barendrecht, Vincent Gouttebarge
OBJECTIVE: Currently, there is no overview of the incidence and (basketball-specific) risk factors of musculoskeletal injuries among recreational basketball players, nor any insight into the effect of preventive measures on the incidence of basketball injuries. This study aimed to gather systematically the scientific evidence on the incidence, prevalence, aetiology and preventive measures for musculoskeletal injuries among recreational basketball players. METHODS: Highly sensitive search strategies were built based on three groups of keywords (and related search terms)...
January 5, 2018: Physician and Sportsmedicine
https://www.readbyqxmd.com/read/29302753/a-comparison-between-the-force-velocity-relationships-of-unloaded-and-sled-resisted-sprinting-single-vs-multiple-trial-methods
#15
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/29299878/talent-identification-and-development-in-male-football-a-systematic-review
#16
REVIEW
Hugo Sarmento, M Teresa Anguera, Antonino Pereira, Duarte Araújo
BACKGROUND: Expertise has been extensively studied in several sports over recent years. The specificities of how excellence is achieved in Association Football, a sport practiced worldwide, are being repeatedly investigated by many researchers through a variety of approaches and scientific disciplines. OBJECTIVE: The aim of this review was to identify and synthesise the most significant literature addressing talent identification and development in football. We identified the most frequently researched topics and characterised their methodologies...
January 3, 2018: Sports Medicine
https://www.readbyqxmd.com/read/29284578/sudden-cardiac-death-in-athletes
#17
REVIEW
Michael S Emery, Richard J Kovacs
Sudden cardiac death is a tragedy at any age and under any circumstances but is perhaps most tragic when it claims the life of the athlete, the individual who epitomizes health and a healthy lifestyle. Sports cardiologists from around the world have worked to quantitate the incidence of sudden cardiac death (SCD) in the athlete, to identify risk factors, to develop pre-participation screening tools, and to formulate plans to deal with on-field SCD. Progress has been made, but much remains to be done in order to make both competitive and recreational sports safer for both patients with known cardiac disease and athletes without known or suspected cardiac abnormalities...
January 2018: JACC. Heart Failure
https://www.readbyqxmd.com/read/29284452/screw-migration-and-oesophageal-perforation-after-surgery-for-osteosarcoma-of-the-cervical-spine
#18
Luca Denaro, Umile Giuseppe Longo, Alberto Corrado Di Martino, Nicola Maffulli, Vincenzo Denaro
BACKGROUND: Even though internal fixation has expanded the indications for cervical spine surgery, it carries the risks of fracture or migration, with associated potential life threatening complications. Removal of metal work from the cervical spine is required in case of failure of internal fixation, but it can become challenging, especially when a great amount of scar tissue is present because of previous surgery and radiotherapy. CASE PRESENTATION: We report a 16 year old competitive basketball athlete who underwent a combined anterior and posterior approach for resection of an osteosarcoma of the sixth cervical vertebra...
December 29, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/29283933/a-preventive-model-for-muscle-injuries-a-novel-approach-based-on-learning-algorithms
#19
Alejandro López-Valenciano, Francisco Ayala, José Miguel Puerta, Mark De Ste Croix, Francisco Vera-García, Sergio Hernández-Sánchez, Iñaki Ruiz-Pérez, Gregory Myer
INTRODUCTION: The application of contemporary statistical approaches coming from Machine Learning and Data Mining environments to build more robust predictive models to identify athletes at high risk of injury might support injury prevention strategies of the future. PURPOSE: The purpose was to analyse and compare the behaviour of numerous machine learning methods in order to select the best performing injury risk factor model to identify athlete at risk of lower extremity muscle injuries (MUSINJ)...
December 28, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/29283792/weight-loss-strategies-in-combat-sports-and-concerning-habits-in-mixed-martial-arts
#20
Oliver R Barley, Dale W Chapman, Chris R Abbiss
PURPOSE: Combat sports are typically divided into weight classes and body mass manipulation to reach a weight class is commonplace. Previous research suggests that mixed martial arts (MMA) weight loss practices may be more extreme than other combat sports. We sought to investigate the magnitude of weight lost and prevalence of weight loss strategies in different combat sports. METHODS: Competitors (n=637) from Brazilian jiu jitsu (BJJ), boxing, judo, MMA, muay Thai/kickboxing (MT/K), taekwondo (TKD) and wrestling completed an online questionnaire seeking information regarding their weight loss practices...
December 28, 2017: International Journal of Sports Physiology and Performance
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