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https://www.readbyqxmd.com/read/28282745/overuse-wrist-injuries-in-young-athletes-what-do-sports-physicians-consider-important-signals-and-functional-limitations
#1
Laura S Kox, P Paul F M Kuijer, Jip Opperman, Gino M M J Kerkhoffs, Mario Maas, Monique H W Frings-Dresen
This study's objective was to collect items from experienced sports physicians, relating to the presence and severity of overuse wrist injuries in young athletes, for developing a measurement instrument for signals of overuse wrist injury. Seven Dutch elite sports physicians involved in guidance and treatment of young athletes in wrist-loading sports (gymnastics, tennis, judo, field hockey, volleyball and rowing) participated in a focus group. They discussed signals and limitations related to overuse wrist injuries in young athletes...
February 21, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28276914/biomechanics-of-judo-backward-breakfall-for-different-throwing-techniques-in-novice-judokas
#2
Sentaro Koshida, Takanori Ishii, Tadamitsu Matsuda, Toshihiko Hashimoto
It is generally accepted that proper learning of the breakfall technique during early judo training is essential for attenuating the risk of judo-related head injury. Therefore, it is critical to understand the kinematics and head injury risks of breakfall motion to design a more safe and effective judo teaching paradigm that results in reduction of injury risk. We aimed to investigate the biomechanics of judo backward breakfalls by comparing osoto-gari and ouchi-gari in novice judokas. Twelve male novice judokas (age: 21...
February 10, 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/28149374/sex-differences-and-the-effects-of-modified-combat-regulations-on-endurance-capacity-in-judo-athletes-a-meta-analytic-approach
#3
Katarzyna Sterkowicz-Przybycień, David H Fukuda
Judo requires endurance capacity to recover from its high-intensity intermittent actions. This systematic review aimed to evaluate VO2max and the anaerobic threshold in competitive male and female judo athletes. Twelve eligible studies were chosen for quantitative meta-analysis, including results for 188 male and 159 female athletes. Combined values were calculated and compared by gender prior to and following altered combat regulations in 2003. No significant differences in VO2max were noted following the rule changes, but female athletes' values increased to a level comparable to those reported in male athletes prior to the alterations...
June 1, 2016: Journal of Human Kinetics
https://www.readbyqxmd.com/read/28125330/effects-of-bilateral-and-non-dominant-practices-on-the-lateral-preference-in-judo-matches
#4
Eliseo Iglesias-Soler, Xian Mayo, Xurxo Dopico, Miguel Fernández-Del-Olmo, Eduardo Carballeira, Juan Fariñas, Sergio Fernández-Uribe
This study analysed the effects of bilateral and non-dominant practice on novice practitioners' lateral preference for judo skills in a combat context (i.e., randori). Thirty sports sciences students (22 men and 8 women; mean age 19 ± 1 years) with right hand, foot, and counterclockwise rotation preferences were divided into 3 groups: bilateral (BG; n = 8), non-dominant (NDG; n = 11), and control (CG; n = 11). Participants received 8 weeks of training at a rate of 3 days per week. The NDG was trained to perform judo skills exclusive with their non-dominant side, while the BG performed every task symmetrically...
January 26, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28119874/performance-and-energy-systems-contributions-during-upper-body-sprint-interval-exercise
#5
Emerson Franchini, Monica Yuri Takito, Maria Augusta Peduti Dal'Molin Kiss
The main purpose of this study was to investigate the performance and energy systems contribution during four upper-body Wingate tests interspersed by 3-min intervals. Fourteen well-trained male adult Judo athletes voluntarily took part in the present study. These athletes were from state to national level, were in their competitive period, but not engaged in any weight loss procedure. Energy systems contributions were estimated using oxygen uptake and blood lactate measurements. The main results indicated that there was higher glycolytic contribution compared to oxidative (P<0...
December 2016: Journal of Exercise Rehabilitation
https://www.readbyqxmd.com/read/28090146/rapid-weight-loss-in-the-context-of-ramadan-observance-recommendations-for-judokas
#6
REVIEW
A Aloui, H Chtourou, W Briki, M Tabben, A Chaouachi, N Souissi, R J Shephard, K Chamari
Judo is a weight-classified combat sport, and many athletes seek to compete at the lightest possible weight category to gain an advantage from competing against shorter/smaller, and supposedly weaker opponents. To achieve a desired weight, most judokas opt for rapid weight loss techniques. Short-duration maximal efforts are not greatly affected by "making weight", but prolonged and/or repeated exercise is significantly impaired. Negative effects on mood, ratings of perceived exertion, and cognitive function are also reported...
December 2016: Biology of Sport
https://www.readbyqxmd.com/read/28090141/do-maximal-aerobic-power-and-blood-lactate-concentration-affect-specific-judo-fitness-test-performance-in-female-judo-athletes
#7
H Garbouj, M A Selmi, R Haj Sassi, M Haj Yahmed, K Chamari, A Chaouachi
The Special Judo Fitness Test (SJFT) has become the test most widely used by coaches and physical trainers for assessment of competitors' judo-specific physical aptitude and training programme prescription. The aim of this study was to investigate the relationship between the SJFT performance indices and both maximal aerobic power and the level of blood lactate concentrations in female judo athletes. Seventeen female judokas (age: 21.9±1.6 years, body mass: 74.6±27.4 kg, height: 164.5±8.6 cm; BMI: 27.1±8...
December 2016: Biology of Sport
https://www.readbyqxmd.com/read/28081034/the-effects-of-the-removal-of-electronic-devices-for-48-hours-on-sleep-in-elite-judo-athletes
#8
Ian C Dunican, David T Martin, Shona L Halson, Reid Reale, Brian Dawson, John Caldwell, Maddison J Jones, Peter R Eastwood
OBJECTIVE: This study examined the effects of the removal of electronic devices (i.e., smartphones, etc.) for 48 hours on sleep quality and next-day athletic and cognitive performance in elite Judo athletes. PARTICIPANTS: Over 6 days and nights, 23 eliteAustralian Judo athletes were monitored while attending a camp at the Australian Institute of Sport (AIS). In 14 athletes all electronic devices were removed on days 3 & 4 (i.e. for 48 hours: the 'device-restricted group') while 9 were permitted to use their devices throughout the camp (the 'control group')...
January 4, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28050917/acute-caffeine-ingestion-on-performance-in-young-judo-athletes
#9
Camilla Astley, Diego Souza, Marcos Polito
PURPOSE: To compare the acute effect of caffeine ingestion on performance in young judo athletes. METHODS: In a randomized double-blind design, eighteen judo athletes (16.1 ± 1.4 yrs.) were evaluated on three nonconsecutive days. On the first day, the special judo fitness test (SJFT) was used as a control session. On the second day, the sample was randomly divided into two equal groups. One group received 4 mg.kg(-1) of caffeine (capsule) and the other group received a placebo...
January 4, 2017: Pediatric Exercise Science
https://www.readbyqxmd.com/read/27965597/transcranial-direct-current-stimulation-effects-on-athletes-cognitive-performance-an-exploratory-proof-of-concept-trial
#10
Davimar M M Borducchi, July Silveira Gomes, Henrique Akiba, Quirino Cordeiro, José Henrique M Borducchi, Lívia Stocco Sanches Valentin, Gabrielle M Borducchi, Álvaro Machado Dias
Among the 2016 Olympic and Paralympic Games' unforgettable moments, one could not overlook performances by Phelps and Bolt, which challenge old premises about the maximum extension of individual supremacism in ultracompetitive modalities and the doping scandals. Different media channels resonated these two trends, with an unseen rise on discussions about traits and practices that may set ultrahigh performance athletes apart from the more ordinary ones. Yet, some key issues remain undebated. This paper aims to add to this debate, with a proof of concept trial, which investigates whether transcranial direct current stimulation (tDCS) may serve as an aid for professional athletes...
2016: Frontiers in Psychiatry
https://www.readbyqxmd.com/read/27763582/assessment-of-the-impact-of-regular-judo-practice-on-body-posture-balance-and-lower-limbs-mechanical-output-in-six-year-old-boys
#11
Robert Walaszek, Stanislaw Sterkowicz, Wieslaw Chwala, Katarzyna Sterkowicz-Przybycien, Katarzyna Walaszek, Marcin Burdacki, Artur Klys
BACKGROUND: Physical activity is beneficial for young children. The aim is to monitor the changes in body posture and balance, as well as in the level of lower limbs mechanical output in six-year-old boys practicing judo (JU) and in a group not practicing that sport (NT). METHODS: In 12 matched pairs of boys (JU+NT) body mass and height were measured and BMI was calculated at three time points (baseline, three months, six months). Body posture was evaluated with the use of Moiré method (TT, DTK, MR, LALBC-F, DALBS)...
October 20, 2016: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/27762171/decrease-of-spasticity-after-hybrid-assistive-limb-%C3%A2-training-for-a-patient-with-c4-quadriplegia-due-to-chronic-sci
#12
Akira Ikumi, Shigeki Kubota, Yukiyo Shimizu, Hideki Kadone, Aiki Marushima, Tomoyuki Ueno, Hiroaki Kawamoto, Yasushi Hada, Akira Matsumura, Yoshiyuki Sankai, Masashi Yamazaki
CONTEXT: Recently, locomotor training with robotic assistance has been found effective in treating spinal cord injury (SCI). Our case report examined locomotor training using the robotic suit hybrid assistive limb (HAL) in a patient with complete C4 quadriplegia due to chronic SCI. This is the first report examining HAL in complete C4 quadriplegia. FINDINGS: The patient was a 19-year-old man who dislocated C3/4 during judo 4 years previously. Following the injury, he underwent C3/4 posterior spinal fusion but remained paralyzed despite rehabilitation...
October 20, 2016: Journal of Spinal Cord Medicine
https://www.readbyqxmd.com/read/27751193/the-role-of-echocardiography-in-the-evaluation-of-cardiac-re-modelling-and-differentiation-between-physiological-and-pathological-hypertrophy-in-teenagers-engaged-in-competitive-amateur-sports
#13
Ljiljana S Sulovic, Meho Mahmutovic, Snezana Lazic, Nenad Sulovic
Aims "Athlete's heart" is a cardiac adaptation to long-term intensive training. The aims of this study were to show the prevalence of left ventricular hypertrophy in teenagers who participate in sports, to define the different types of cardiac re-modelling, and to differentiate between physiological and pathological hypertrophy. METHOD: Echocardiographic measurements were obtained by M-mode, two dimensional, and Doppler techniques of participants from sports and control groups. RESULTS: The echocardiographic examinations included 100 healthy teenagers taking part in dynamic sports such as football and basketball and 100 healthy teenagers taking part in static sports such as karate and judo...
October 18, 2016: Cardiology in the Young
https://www.readbyqxmd.com/read/27736312/evaluation-of-sex-specific-movement-patterns-in-judo-using-probabilistic-neural-networks
#14
Bianca Miarka, Katarzyna Sterkowicz-Przybycien, David H Fukuda
The purpose of the present study was to create a probabilistic neural network (PNN) to clarify the understanding of movement patterns in international judo competitions by gender. Analysis of 773 male and 638 female bouts was utilized to identify movements during the approach, gripping, attack (including biomechanical designations), groundwork, defense, and pause phases. PNN and χ(2) tests modeled and compared frequencies (p≤0.05). Women (mean[interquartile range]: 9.9[4;14]) attacked more than men (7.0[3;10]) while attempting a greater number of arm/leg lever (women: 2...
October 13, 2016: Motor Control
https://www.readbyqxmd.com/read/27736310/effects-of-a-10-week-introductory-judo-course-on-postural-control-during-a-bilateral-reactionary-gripping-task
#15
Tyler W D Muddle, David H Fukuda, Ran Wang, Joshua J Riffe, David D Church, Kyle S Beyer, Jay R Hoffman, Jeffrey R Stout
This study examined the effect of a 10-week introductory judo course on postural control during a bilateral reactionary gripping task using varied stance conditions. Twenty volunteers were divided into experimental (JDO) or control (CON) groups. Countermovement jump (CMJ) was measured and center of pressure (COP) variables were evaluated while performing a bilateral reactionary gripping task under varied stance conditions during pre and post testing. No interactions were observed for the COP variables (p>0...
October 13, 2016: Motor Control
https://www.readbyqxmd.com/read/27736247/energy-system-contributions-to-simulated-judo-matches
#16
Ursula F Julio, Valéria L G Panissa, João Victor D C Esteves, Rubiana L Cury, Marcus F Agostinho, Emerson Franchini
PURPOSE: To estimate the contribution of the three energy systems to simulated judo matches. METHODS: Twelve judo athletes (18 ± 1 years-old, 175.1 ± 5.3 cm, 74.3 ± 10.5 kg, 11.7 ± 1.5 % body fat, and 8 ± 2 years of practice) performed five combats with different durations (1, 2, 3, 4 and 5-min), against the same opponent, on different days and blinded to the duration. The estimated energy contribution for the oxidative, glycolytic and ATP-PCr systems were calculated based on V̇O2 during activity, delta of lactate and the fast phase of excess V̇O2, respectively...
October 13, 2016: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/27724999/sports-preference-and-digit-ratio-2d-4d-among-female-students-in-wroc%C3%A5-aw-poland
#17
Marek Kociuba, Slawomir Kozieł, Raja Chakraborty, Zofia Ignasiak
Humans exhibit sex differences in competitiveness, sensation seeking and risk-taking attitude, which are required in sports. These attributes are often linked to prenatal testosterone (PT) exposure. The second-to-fourth digit length ratio (2D:4D) is an indicator of PT exposure. A lower 2D:4D indicates higher PT exposure and vice versa. Males generally have a lower 2D:4D than females. Sensation- and/or thrill-seeking behaviours have also been found to be negatively associated with 2D:4D. Boxing and judo are considered to be high-risk sports...
October 11, 2016: Journal of Biosocial Science
https://www.readbyqxmd.com/read/27676870/aerobic-metabolism-response-in-paraspinal-muscles-of-chronic-low-back-pain-patients-and-judo-athletes-during-an-isokinetic-trunk-extension-exercise
#18
Agathe Anthierens, Nicolas Olivier, Patrick Mucci, André Thevenon
OBJECTIVE: Low back pain is a pathology associated to a trunk extensors muscles weakness. Studies suggested that it could be associated with an inadequacy between oxygen demand and oxygen utilization by paraspinal muscles (Kell and Bhambhani, 2006). In contrast to chronic low back pain (CLBP) patients, judo athletes are characterized by a great trunk extensors muscles endurance, due to their intensive solicitation within sport practice. Our purpose was to compare aerobic metabolism in those muscles of CLBP patients with judo athletes...
September 2016: Annals of Physical and Rehabilitation Medicine
https://www.readbyqxmd.com/read/27631153/optimal-interval-for-success-in-judo-world-ranking-competitions
#19
Emerson Franchini, Monica Y Takito, Rodrigo M da Silva, Seihati A Shiroma, Lance Wicks, Ursula F Julio
PURPOSE: was to determine the optimal interval between competitions for success in the different events of the judo world tour. METHODS: A total of 20,916 female and 29,900 male competition participations in the judo world tour competitions disputed between January 2009 and December 2015 were analyzed, considering the dependent variable, winning a medal, and the independent variables, level of competition. RESULTS: there was an increased probability of winning a medal when the interval was in the 10-13 week range for both male and female athletes competing at Grand Prix, Continental Championship and World Championship events, while for Grand Slam only male had increased probability of winning a medal in this interval range...
September 15, 2016: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/27611084/correction-trunk-stability-trunk-strength-and-sport-performance-level-in-judo
#20
David Barbado, Alejandro Lopez-Valenciano, Casto Juan-Recio, Carlos Montero-Carretero, Jaap H van Dieën, Francisco J Vera-Garcia
[This corrects the article DOI: 10.1371/journal.pone.0156267.].
2016: PloS One
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