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https://www.readbyqxmd.com/read/30054758/cortisol-predicts-performance-during-competition-preliminary-results-of-a-field-study-with-elite-adolescent-taekwondo-athletes
#1
Franziska Lautenbach, Babett H Lobinger
Competitive taekwondo composes a high stress situation leading to an increase in the stress hormone cortisol. Little is known about cortisol's relation to outcome (winning vs. losing) and performance in taekwondo. Therefore, the aim of the study was to investigate cortisol relation to outcome, performance and whether cortisol can predict performance during a competition. Twenty taekwondo combatants (13 males; Mage = 15) provided four salivary samples (C1: 30 min prior, C2: during, C3: after, and C4: 30 min after competition) during an international competition...
July 27, 2018: Applied Psychophysiology and Biofeedback
https://www.readbyqxmd.com/read/30049779/concussion-management-in-combat-sports-consensus-statement-from-the-association-of-ringside-physicians
#2
John Neidecker, Nitin K Sethi, Randolph Taylor, Raymond Monsell, Don Muzzi, Bruce Spizler, Larry Lovelace, Edmund Ayoub, Rick Weinstein, Joseph Estwanik, Patricio Reyes, Robert C Cantu, Barry Jordan, Margaret Goodman, John W Stiller, Jonathan Gelber, Robert Boltuch, Domenic Coletta, Angela Gagliardi, Stephen Gelfman, Patrick Golden, Nicholas Rizzo, Paul Wallace, Allan Fields, Calvin Inalsingh
Various organisations and experts have published numerous statements and recommendations regarding different aspects of sports-related concussion including definition, presentation, treatment, management and return to play guidelines.1-7 To date, there have been no written consensus statements specific for combat sports regarding management of combatants who have suffered a concussion or for return to competition after a concussion. In combat sports, head contact is an objective of the sport itself. Accordingly, management and treatment of concussion in combat sports should, and must, be more stringent than for non-combat sports counterparts...
July 26, 2018: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/30045368/-degenerative-changes-in-the-hand-and-wrist-in-elite-mma-fighting-an-mri-study-in-comparison-to-boxing
#3
Constantin Mayer, Falk Hilsmann, Gerald Julius Wiechmann, Christoph Zilkens, Rüdiger Krauspe, Christoph Schleich
OBJECTIVE: Mixed martial arts (MMA) is a combination of multiple combat sports. Acute injuries in MMA are well known and have been broadly described. However, there is little knowledge about degenerative changes in the musculoskeletal system. The aim of this study was to investigate the impact of techniques used in MMA on the occurrence of degenerative changes in the hand and wrist in comparison to classical boxing. METHODS: 11 MMA fighters and 10 boxers with chronic wrist pain were clinically examined...
June 2018: Handchirurgie, Mikrochirurgie, Plastische Chirurgie
https://www.readbyqxmd.com/read/30043324/brazilian-jiu-jitsu-judo-and-mixed-martial-arts-injuries-presenting-to-united-states-emergency-departments-2008-2015
#4
Caroline Stephenson, Matthew E Rossheim
Limited research has systematically examined injuries resulting from Brazilian Jiu Jitsu (BJJ), Judo, and mixed martial arts (MMA), especially when compared to more well-known or -established martial arts. These three combative sports differ substantially regarding their rules and techniques. BJJ emphasizes ground positioning and submission, Judo rewards throwing an opponent on their back with submission ending the match, and MMA emphasizes knocking out or forcing the submission of one's opponent. We examined injuries, among people of any age, experienced from participation in BJJ, Judo, and MMA...
July 24, 2018: Journal of Primary Prevention
https://www.readbyqxmd.com/read/30040508/relative-energy-deficiency-in-sport-in-male-athletes-a-commentary-on-its-presentation-among-selected-groups-of-male-athletes
#5
Louise M Burke, Graeme L Close, Bronwen Lundy, Martin Mooses, James P Morton, Adam S Tenforde
Low energy availability (LEA) is a key element of the Female Athlete Triad. Causes of LEA include failure to match high exercise energy expenditure (unintentional) or pathological behaviors of disordered eating (compulsive) and overzealous weight control programs (misguided but intentional). Recognition of such scenarios in male athletes contributed to the pronouncement of the more inclusive Relative Energy Deficiency in Sport (RED-S) syndrome. This commentary describes the insights and experience of the current group of authors around the apparently heightened risk of LEA in some populations of male athletes: road cyclists, rowers (lightweight and open weight), athletes in combat sports, distance runners, and jockeys...
July 1, 2018: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/29952865/kinematic-comparison-of-the-roundhouse-kick-between-taekwondo-karate-and-muaythai
#6
Rossano Diniz, Fabrício B Del Vecchio, Gustavo Z Schaun, Henrique B Oliveira, Elisa G Portella, Edson S da Silva, Andressa Formalioni, Paula C C Campelo, Leonardo A Peyré-Tartaruga, Stephanie S Pinto
Diniz, R, Del Vecchio, FB, Schaun, GZ, Oliveira, HB, Portella, EG, da Silva, ES, Formalioni, A, Campelo, PCC, Peyré-Tartaruga, LA, and Pinto, SS. Kinematic comparison of the roundhouse kick between taekwondo, karate, and muaythai. J Strength Cond Res XX(X): 000-000, 2018-The roundhouse kick (RHK) is frequently executed in taekwondo, karate, and muaythai because of its high technical effectiveness during combat. The purpose of this study was to compare kinematic characteristics during RHK performance between taekwondo, karate, and muaythai athletes...
June 25, 2018: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29893586/case-study-fatal-exertional-rhabdomyolysis-possibly-related-to-drastic-weight-cutting
#7
Kadhiresan R Murugappan, Michael N Cocchi, Somnath Bose, Sara E Neves, Charles H Cook, Todd Sarge, Shahzad Shaefi, Akiva Leibowitz
Rapid weight loss or "weight cutting" is a dangerous practice that is ubiquitous in modern combat sports yet underrepresented in the medical literature. We present a case of exertional rhabdomyolysis in a mixed martial artist with sickle cell trait in order to illustrate the hazards of weight cutting and ensuing critical illness. Sickle cell trait is known to predispose patients to exertional rhabdomyolysis and multiple fatal cases have been reported in the setting of strenuous exercise. Dehydration and consequent electrolyte abnormalities make combat sport athletes with sickle cell trait particularly vulnerable to this entity...
June 12, 2018: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/29888376/concussion-knowledge-attitudes-and-reporting-intention-among-adult-competitive-muay-thai-kickboxing-athletes-a-cross-sectional-study
#8
Reidar P Lystad, Stephen J Strotmeyer
BACKGROUND: Muay Thai kickboxing is a full-contact combat sport with a high incidence of head trauma, yet little is known about these athletes' concussion knowledge and attitudes. This study aims to describe and quantify concussion knowledge, attitudes, and reporting intention among adult competitive Muay Thai kickboxing athletes. RESULTS: This cross-sectional study comprised 193 competitive Muay Thai kickboxing athletes aged ≥18 years registered with the Thai Boxing Association Sanctioning Authority...
June 11, 2018: Injury Epidemiology
https://www.readbyqxmd.com/read/29867580/validity-and-reliability-of-the-30-s-continuous-jump-for-anaerobic-power-and-capacity-assessment-in-combat-sport
#9
Drazen Čular, Vladimir Ivančev, Alessandro M Zagatto, Mirjana Milić, Tea Beslija, Maha Sellami, Johnny Padulo
Cycling test such Wingate anaerobic test (WAnT) is used to measure anaerobic power (AP), but not anaerobic capacity (AC, i.e., the metabolic energy demand). However, in sports that do not involve cycling movements (Karate), the continuous jump for 30 s (vertical jumps for 30 s) has been extensively used to measure anaerobic performance in all young athletes. Limited information's are available concerning its validity and reliability especially in children. As such, the current study aimed to test validity and reliability of a continuous jumps test (the CJ30s), using WAnT as a reference...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29848993/the-effect-of-a-new-sodium-bicarbonate-loading-regimen-on-anaerobic-capacity-and-wrestling-performance
#10
Krzysztof Durkalec-Michalski, Emilia Ewa Zawieja, Tomasz Podgórski, Bogna Ewa Zawieja, Patrycja Michałowska, Igor Łoniewski, Jan Jeszka
Gastrointestinal side effects are the main problem with sodium bicarbonate (SB) use in sports. Therefore, our study assessed the effect of a new SB loading regimen on anaerobic capacity and wrestling performance. Fifty-eight wrestlers were randomized to either a progressive-dose regimen of up to 100 mg∙kg-1 of SB or a placebo for 10 days. Before and after treatment, athletes completed an exercise protocol that comprised, in sequence, the first Wingate, dummy throw, and second Wingate tests. Blood samples were taken pre- and post-exercise...
May 30, 2018: Nutrients
https://www.readbyqxmd.com/read/29844991/physical-fitness-predicts-technical-tactical-and-time-motion-profile-in-simulated-judo-and-brazilian-jiu-jitsu-matches
#11
Victor S Coswig, Paulo Gentil, João C A Bueno, Bruno Follmer, Vitor A Marques, Fabrício B Del Vecchio
Background: Among combat sports, Judo and Brazilian Jiu-Jitsu (BJJ) present elevated physical fitness demands from the high-intensity intermittent efforts. However, information regarding how metabolic and neuromuscular physical fitness is associated with technical-tactical performance in Judo and BJJ fights is not available. This study aimed to relate indicators of physical fitness with combat performance variables in Judo and BJJ. Methods: The sample consisted of Judo ( n  = 16) and BJJ ( n  = 24) male athletes...
2018: PeerJ
https://www.readbyqxmd.com/read/29804220/trash-talking-and-trolling
#12
Kevin M Kniffin, Dylan Palacio
Among the extra-physical aspects of team sports, the ways in which players talk to each other are among the more colorful but understudied dimensions of competition. To contribute an empirical basis for examining the nature of "trash talk," we present the results of a study of 291 varsity athletes who compete in the top division among US universities. Based on a preliminary review of trash-talk topics among student-athletes, we asked participants to indicate the frequency with which they have communicated or heard others talk about opposing players' athleticism, playing ability, physical appearance, boyfriends, girlfriends, sexual behavior, parents, and home institution during competitions...
May 26, 2018: Human Nature: An Interdisciplinary Biosocial Perspective
https://www.readbyqxmd.com/read/29803126/a-novel-approach-for-rehabilitation-of-a-triceps-tendon-rupture-a-case-report
#13
Wagner Rodrigues Martins, Juscelino Castro Blasczyk, Saulo Soares, Wagner Diniz de Paula, Martim Bottaro, Paulo Gentil
OBJECTIVE: Generate hypotheses and add new perspectives to the literature in the nonsurgical management of large ruptures in the distal part of the triceps tendon. METHODS: The patient was physically active, right handed, with a history of 20 years of resistance training practice and involvement in many activities, mostly combat sports (boxing, karate and mixed martial arts). The exercise program was designed with high repetitions and low rest intervals between sets in order to increase the metabolic stress...
July 2018: Physical Therapy in Sport
https://www.readbyqxmd.com/read/29795744/does-body-mass-index-influence-the-physiological-and-perceptual-demands-associated-with-defensive-tactics-training-in-state-patrol-officers
#14
J J Dawes, C L Kornhauser, D Crespo, C L Elder, K G Lindsay, R J Holmes
The purpose of this investigation was to determine the physiological and perceptual demands associated with defensive tactics (DEFTAC) training among state patrol officers of different BMI (body mass index) categories. Twenty-four male state patrol officers (n = 24, age 36.00 + 7.86 yrs) voluntarily agreed to participate in data collection during a DEFTAC gauntlet. Anthropometric information (height (HT) 182.19 + 7.43 cm and weight (WT) 96.31 + 17.45 kg), body mass index (BMI), peak and average heart rates, duty weight, BLa, and RPE, were recorded...
2018: International Journal of Exercise Science
https://www.readbyqxmd.com/read/29787695/incidence-of-musculoskeletal-injury-in-us-army-unit-types-a-prospective-cohort-study
#15
Deydre S Teyhen, Stephen L Goffar, Scott W Shaffer, Kyle Kiesel, Robert J Butler, Ann-Maree Tedaldi, Jennifer C Prye, Daniel I Rhon, Phillip J Plisky
Study Design A prospective observational cohort. Background Musculoskeletal injuries during military service are a primary source of disability resulting in 2.4 million annual health care visits and 25 million limited-duty days. While the injury incidence during basic training is well documented there is little understanding of injury distribution by organization type in the Army following initial training. Objective Compare injury incidence, distribution, and impact across various military units. Methods Comprehensive injury data from subject questionnaires and medical chart reviews were collected for 1430 initially healthy Army personnel representing combat, combat support, combat service support, and ranger units over 12 months...
May 22, 2018: Journal of Orthopaedic and Sports Physical Therapy
https://www.readbyqxmd.com/read/29781992/muscle-imbalances-testing-and-training-functional-eccentric-hamstring-strength-in-athletic-populations
#16
Petr Stastny, Michal Lehnert, James J Tufano
Many hamstring injuries that occur during physical activity occur while the muscles are lengthening, during eccentric hamstring muscle actions. Opposite of these eccentric hamstring actions are concentric quadriceps actions, where the larger and likely stronger quadriceps straighten the knee. Therefore, to stabilize the lower limbs during movement, the hamstrings must eccentrically combat against the strong knee-straightening torque of the quadriceps. As such, eccentric hamstring strength expressed relative to concentric quadricep strength is commonly referred to as the "functional ratio" as most movements in sports require simultaneous concentric knee extension and eccentric knee flexion...
May 1, 2018: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29764915/remote-physiological-monitoring-in-an-austere-environment-a-future-for-battlefield-care-provision
#17
Matthew J Smyth, J A Round, A J Mellor
Wearable technologies are making considerable advances into the mainstream as they become smaller and more user friendly. The global market for such devices is forecasted to be worth over US$5 billion in 2018, with one in six people owning a device. Many professional sporting teams use self-monitoring to assess physiological parameters and work rate on the pitch, highlighting the potential utility for military command chains. As size of device reduces and sensitivity improves, coupled with remote connectivity technology, integration into the military environment could be relatively seamless...
May 14, 2018: Journal of the Royal Army Medical Corps
https://www.readbyqxmd.com/read/29746803/urine-specific-gravity-as-an-indicator-of-dehydration-in-olympic-combat-sport-athletes-considerations-for-research-and-practice
#18
Damir Zubac, Reid Reale, Hrvoje Karnincic, Anamaria Sivric, Igor Jelaska
Urine specific gravity (USG ) is the most commonly reported biochemical marker used in research and applied settings to detect fluid deficits in athletes, including those participating in combat sports. Despite the popularity of its use, there has been a growing debate regarding the diagnostic accuracy and the applicability of USG in characterizing whole-body fluid status and fluctuations. Moreover, recent investigations report universally high prevalence of hypohydration (∼90%) via USG assessment in combat sport athletes, often in spite of stable body-mass...
May 10, 2018: European Journal of Sport Science
https://www.readbyqxmd.com/read/29738282/caffeine-ingestion-changes-time-motion-and-technical-tactical-aspects-in-simulated-boxing-matches-a-randomized-double-blind-pla-controlled-crossover-study
#19
Victor Silveira Coswig, Paulo Gentil, Francine Irigon, Fabrício Boscolo Del Vecchio
The number of offensive actions and glycolytic energy in combat sports both increase with caffeine (CAF) ingestion. In addition, the effects of CAF on technical-tactical and time-motion analysis and physiological parameters in boxing are unknown. This study aimed to investigate the effects of CAF ingestion on physiological parameters and the notational analysis of boxing matches. Ten male boxers were recruited; the participants ingested 6 mg kg-1 BM of CAF or placebo (PLA) 30 min prior to the match in a crossover design...
May 8, 2018: European Journal of Sport Science
https://www.readbyqxmd.com/read/29736195/chest-ultrasonography-in-modern-day-extreme-settings-from-military-setting-and-natural-disasters-to-space-flights-and-extreme-sports
#20
REVIEW
Francesco Feletti, Viviana Mucci, Andrea Aliverti
Chest ultrasonography (CU) is a noninvasive imaging technique able to provide an immediate diagnosis of the underlying aetiology of acute respiratory failure and traumatic chest injuries. Given the great technologies, it is now possible to perform accurate CU in remote and adverse environments including the combat field, extreme sport settings, and environmental disasters, as well as during space missions. Today, the usage of CU in the extreme emergency setting is more likely to occur, as this technique proved to be a fast diagnostic tool to assist resuscitation manoeuvres and interventional procedures in many cases...
2018: Canadian Respiratory Journal: Journal of the Canadian Thoracic Society
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