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Taekwondo

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https://www.readbyqxmd.com/read/29445348/taekwondo-fighting-in-training-does-not-simulate-the-affective-and-cognitive-demands-of-competition-implications-for-behavior-and-transfer
#1
Michael A Maloney, Ian Renshaw, Jonathon Headrick, David T Martin, Damian Farrow
Enhancing practice design is critical to facilitate transfer of learning. Considerable research has focused on the role of perceptual information in practice simulation, yet has neglected how affect and cognition are shaped by practice environments and whether this influences the fidelity of behavior (Headrick et al., 2015). This study filled this gap by examining the fidelity of individual (cognition, affect, and actions) and interpersonal behavior of 10 highly skilled Australian Taekwondo athletes fighting in training compared to competition...
2018: Frontiers in Psychology
https://www.readbyqxmd.com/read/29370541/effects-of-lunar-phases-on-short-term-explosive-physical-performance-among-young-trained-athletes
#2
Narimen Yousfi, Mohamed Arbi Mejri, Mehdi Rouissi, Amri Hammami, Montassar Tabben, Anis Chaouachi, Monoem Haddad, Karim Chamari
Beliefs that lunar phases affect human physiology started in ancient times. Research has recently revealed that a physical fitness index increased in sedentary students at the new moon (NM) and full moon (FM) compared to other moon phases. However, the effect of lunar cycle (moon illumination and gravitational pull) on physical performance in athletes was not examined. Therefore, this study aimed to evaluate whether short-term explosive performance can be influenced by the different phases of the lunar cycle...
January 25, 2018: Chronobiology International
https://www.readbyqxmd.com/read/29355092/sodium-bicarbonate-ingestion-increases-glycolytic-contribution-and-improves-performance-during-simulated-taekwondo-combat
#3
João Paulo Lopes-Silva, Jonatas Ferreira Da Silva Santos, Guilherme Giannini Artioli, Irineu Loturco, Chris Abbiss, Emerson Franchini
PURPOSE: To investigate the effect of sodium bicarbonate (NaHCO3) on performance and estimated energy system contribution during simulated taekwondo combat. METHODS: Nine taekwondo athletes completed two experimental sessions separated by at least 48 h. Athletes consumed 300 mg/kg body mass of NaHCO3 or placebo (CaCO3) 90 min before the combat simulation (three rounds of 2 min separated by 1 min passive recovery), in a double-blind, randomized, repeated-measures crossover design...
January 20, 2018: European Journal of Sport Science
https://www.readbyqxmd.com/read/29327170/the-effects-of-a-single-session-of-spinal-manipulation-on-strength-and-cortical-drive-in-athletes
#4
Thomas Lykke Christiansen, Imran Khan Niazi, Kelly Holt, Rasmus Wiberg Nedergaard, Jens Duehr, Kathryn Allen, Paul Marshall, Kemal S Türker, Jan Hartvigsen, Heidi Haavik
PURPOSE: The primary purpose of this study was to investigate whether a single session of spinal manipulation (SM) increases strength and cortical drive in the lower limb (soleus muscle) of elite Taekwondo athletes. METHODS: Soleus-evoked V-waves, H-reflex and maximum voluntary contraction (MVC) of the plantar flexors were recorded from 11 elite Taekwondo athletes using a randomized controlled crossover design. Interventions were either SM or passive movement control...
January 11, 2018: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/29326904/effects-of-habitual-smoking-on-cardiopulmonary-function-in-taekwondo-athletes
#5
Dong-Jin Jang, Hee-Cheol Kim, Jae-Kyung Kim, Sun-Young Jung, Dae-Young Kim
This study aimed to verify habitual smoking effects on cardiopulmonary function in taekwondo athletes. Subjects were university taekwondo athletes aged 20-24 years in nonsmoker (n= 9) and smoker (n= 6) groups. Subjects underwent an exercise examination for their ventilation threshold, minute ventilation, oxygen uptake, maximum volume of minute oxygen consumption, heart rate, and oxygen pulse during exercise and 1, 3, and 5 min after maximum exercise. The time of reaching the ventilation threshold was significantly higher in nonsmokers than in smokers...
December 2017: Journal of Exercise Rehabilitation
https://www.readbyqxmd.com/read/29326898/effect-of-10-weight-loss-on-simulated-taekwondo-match-performance-a-randomized-trial
#6
Leonardo de Sousa Fortes, Gustavo César de Vasconcelos, Bruna Daniella de Vasconcelos Costa, Pedro Pinheiro Paes, Emerson Franchini
The objective of the present study was to analyze the effect of 10% body mass reduction on simulated taekwondo match performance. Thirty-one male taekwondo athletes were randomly distributed in two groups: weight loss group (n= 15) - athletes in this group reduced 5% body mass per week during two successive weeks, totaling 10% body mass reduction; control group (n= 16) - athletes in this group kept their body mass constant during the 2-week period. Twenty-four hours before and after this period, athletes performed a simulated 3-round taekwondo match (6 min)...
December 2017: Journal of Exercise Rehabilitation
https://www.readbyqxmd.com/read/29310525/proactive-and-reactive-motor-inhibition-in-top-athletes-versus-nonathletes
#7
Damien Brevers, Etienne Dubuisson, Fabien Dejonghe, Julien Dutrieux, Mathieu Petieau, Guy Cheron, Paul Verbanck, Jennifer Foucart
We examined proactive (early restraint in preparation for stopping) and reactive (late correction to stop ongoing action) motor response inhibition in two groups of participants: professional athletes ( n = 28) and nonathletes ( n = 25). We recruited the elite athletes from Belgian national taekwondo and fencing teams. We estimated proactive and reactive inhibition with a modified version of the stop-signal task (SST) in which participants inhibited categorizing left/right arrows. The probability of the stop signal was manipulated across blocks of trials by providing probability cues from the background computer screen color (green = 0%, yellow =17%, orange = 25%, red = 33%)...
January 1, 2018: Perceptual and Motor Skills
https://www.readbyqxmd.com/read/29283792/weight-loss-strategies-in-combat-sports-and-concerning-habits-in-mixed-martial-arts
#8
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
https://www.readbyqxmd.com/read/29194182/effect-of-post-activation-potentiation-induced-by-elastic-resistance-on-kinematics-and-performance-in-a-roundhouse-kick-of-trained-martial-arts-practitioners
#9
Håkon Strand Aandahl, Erna Von Heimburg, Roland Van den Tillaar
The aim of this study was to examine if kicking with elastic resistance during warm-up could initiate Post-Activation Potentiation (PAP), and thereby positively influence kinematics and performance on subsequent explosive roundhouse kicking. Five woman and eleven men (n=16) with a background in kickboxing (n=10) and/or TaeKwonDo (n=6) performed two warm-up strategies with three subsequent test-kicks 5-8 minutes after a PAP inducing exercise. Kicking performance, defined as roundhouse kicking velocity with the foot, was measured using 3D motion capture (500 Hz) with a 15 marker lower body 3D model...
November 29, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29174581/comparison-of-lung-diffusing-capacity-in-young-elite-athletes-and-their-counterparts
#10
B Lazovic, M Zlatkovic-Svenda, J Grbovic, B Milenković, S Sipetic-Grujicic, I Kopitovic, V Zugic
BACKGROUND: The influence of exercise on the pulmonary function is controverse, some studies have reported no sports influence, while the others have found positive correlation. AIM: To evaluate and compare the sports influence on pulmonary function: spirometry (VC, FVC, FEV1, FEV1/FVC), lung diffusing capacity (DLCO) and coefficient of the CO gas transfer (KCO) in two elite athletes groups and healthy sedentary controls. METHOD: Equally divided into aerobic and anaerobic group, 60 elite athletes were recruited, as well as 43 age-matched, healthy sedentary controls...
November 21, 2017: Revista Portuguesa de Pneumologia
https://www.readbyqxmd.com/read/29127266/injuries-in-female-and-male-elite-taekwondo-athletes-a-10-year-prospective-epidemiological-study-of-1466-injuries-sustained-during-250-000-training-hours
#11
Ki Jun Park, Brian Byung Song
OBJECTIVES: We aimed to determine the injury patterns associated with training activities in elite South Korean taekwondo athletes training for the Olympic Games. METHODS: We collected data prospectively from 2007 to 2016 at the Korea National Training Center in Seoul, South Korea. A sports injury was defined as acute or chronic musculoskeletal signs and symptoms due to taekwondo activities during training sessions. Athletes were assessed by an on-site sports medicine specialist...
November 10, 2017: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/29120989/validity-and-reliability-of-a-new-test-of-planned-agility-in-elite-taekwondo-athletes
#12
Helmi Chaabene, Yassine Negra, Laura Capranica, Raja Bouguezzi, Younés Hachana, Mohamed Ali Rouahi, Bessem Mkaouer
This study aimed to examine the validity, reliability, and sensitivity of a new test of planned agility in elite taekwondo athletes and to establish its relationship with sprint-time, jumping ability, and dynamic balance. Twenty-seven (20 males and 7 females) taekwondo athletes participated to this study. They performed taekwondo-specific agility test (TSAT) in two occasions (i.e., test-retest). Additionally, they performed jumping ability (i.e., squat jump, countermovement jump, standing long jump, and three-hop jump), sprint-time (5-m and 20-m dash), and dynamic balance (i...
November 6, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29114704/dental-injuries-in-taekwondo-athletes-practicing-in-saudi-arabia
#13
Yazan R Aljohani, Khalid H Alfaifi, Samaa K Redwan, Dania A Sabbahi, Mohammed H Zahran
To assess the incidence and awareness of taekwondo athletes in Saudi Arabia regarding oral and maxillofacial (OMF) injuries and their prevention. Methods: In this cross-sectional study, an online questionnaire about the incidence and awareness of OMF injuries and their prevention was developed and distributed to taekwondo athletes in Saudi Arabia via their coaches.  Results: Sixty-eight responses were collected. The mean age of the participants was 29.3±9.1 years and 97% of them were males. Most of the participants (83%) believed that they are vulnerable to OMF injuries during practice...
November 2017: Saudi Medical Journal
https://www.readbyqxmd.com/read/29111630/anthropometric-profile-of-combat-athletes-via-multivariate-analysis
#14
Anna Burdukiewicz, Jadwiga Pietraszewska, Aleksandra Stachoń, Justyna Andrzejewska
BACKGROUND: Athletic success is a complex phenotype influenced by multiple factors, from sport-specific skills to anthropometric characteristics. Considering the latter, the literature has repeatedly indicated that athletes possess distinct physical characteristics depending on the practiced discipline. The aim of the present study was to apply univariate and multivariate methods to assess a wide range of morphometric and somatotypic characteristics in male combat athletes. METHODS: Biometric data were obtained from 206 male university-level practitioners of judo, jiu-jitsu, karate, kickboxing, taekwondo, and wrestling...
November 7, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/29099672/rotational-and-linear-head-accelerations-from-taekwondo-kicks-and-punches
#15
Gabriel P Fife, David M O'sullivan, Sae Yong Lee
The purpose was to compare rotational and linear head accelerations as a result of taekwondo kicks and punches. Taekwondo athletes executed five repetitions of the turning kick, spinning hook kick, hook punch, straight punch, and jab punch to a Hybrid III Crash Test Dummy head-neck complex. A tri-axial accelerometer and an angular rate sensor were mounted inside the Hybrid III head to measure resultant linear (RLA) and rotational accelerations. The Hybrid III was fixed to a height-adjustable frame and fitted with protective taekwondo headgear...
November 3, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/29077497/rupture-of-the-extensor-hallucis-longus-muscle-secondary-to-repetitive-overuse-in-a-taekwondo-athletea-case-report
#16
Dong-Il Chun, Jun-Hyuck Lee, Jaeho Cho
Closed rupture of the extensor hallucis longus (EHL) tendon is rare, with most cases caused by either direct penetrating trauma or predisposing factors such as corticosteroid injection and iatrogenic trauma incidences. Almost all of the previous case reports have reported on rupture of the EHL tendon rather than the EHL muscle. In this report, we highlight an unusual clinical presentation of a rupture of the EHL muscle and discuss its predisposing factors. This patient was a taekwondo athlete with EHL muscle rupture secondary to repetitive overuse without any underlying systemic or local predisposing factors or direct trauma...
September 2017: Journal of the American Podiatric Medical Association
https://www.readbyqxmd.com/read/29023276/epidemiology-of-competition-injuries-in-elite-european-judo-athletes-a-prospective-cohort-study
#17
Dušana Čierna, Miloš Štefanovský, Lenka Matejová, Reidar P Lystad
OBJECTIVE: To determine the injury incidence rate (IIR) and injury pattern, and to identify risk factors for injury, among elite adult European judo athletes. DESIGN: Prospective cohort study. SETTING: The 2015 Under 23 European Judo Championships, Bratislava, Slovakia. PARTICIPANTS: All registered athletes (N = 295). INDEPENDENT VARIABLES: Sex, weight division, and fight outcome. MAIN OUTCOME MEASURES: Injury incidence rates were calculated per 1000 athlete-exposures (IIRAE) and per 1000 minutes of exposure (IIRME) with 95% confidence intervals (CI)...
October 11, 2017: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
https://www.readbyqxmd.com/read/28954799/a-systematic-review-of-prospective-epidemiological-research-into-injury-and-illness-in-olympic-combat-sport
#18
REVIEW
Sally J Bromley, Michael K Drew, Scott Talpey, Andrew S McIntosh, Caroline F Finch
BACKGROUND: Combat sports involve body contact through striking, kicking and/or throwing. They are anecdotally referred to as 'dangerous', yet long-term investigation into specific injury rates is yet to be explored. OBJECTIVE: To describe incidence and prevalence of injury and illness within Olympic combat sports and to investigate risk of bias of prospective injury and illness research within these sports. METHODS: We systematically searched literature published up until May 2016...
January 2018: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/28933715/rating-of-perceived-exertion-for-quantification-of-training-and-combat-loads-during-combat-sport-specific-activities-a-short-review
#19
Maamer Slimani, Philip Davis, Emerson Franchini, Wassim Moalla
The aim of this short review was to summarize data pertaining to the rating of perceived exertion (RPE) methods (RPE value and session-RPE) during combat sport-specific activities (i.e., competition and training) based on many factors, including contest type (i.e., official vs. simulated vs. training), combat rounds, age of participants and muscle groups, and their correlation with physiological variables (i.e., blood lactate concentration [La] and heart rate [HR]). The current review shows higher RPE in a match of mixed martial arts (MMAs) than Brazilian jiu-jitsu and kickboxing matches and during the competitive period compared with the precompetitive period...
October 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28878457/effects-of-chronic-ankle-instability-and-induced-mediolateral-muscular-fatigue-of-the-ankle-on-competitive-taekwondo-athletes
#20
Myeounggon Lee, Changhong Youm, Minji Son, Jinhee Kim, Youkyung Kim
[Purpose] The purpose of this study was to investigate the effects of chronic ankle instability and induced mediolateral muscular fatigue of the ankle on competitive Taekwondo athletes during single-leg drop landing. [Subjects and Methods] Fourteen competitive taekwondo athletes with chronic ankle instability and 14 healthy adults participated, and they performed three single-leg drop landings from a 40-cm height before and after induced fatigue. Ankle angular position, peak vertical ground reaction force, loading rate, eccentric work, and contribution were calculated and analyzed...
August 2017: Journal of Physical Therapy Science
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