Postural control and physiological responses to a simulated match in U-20 judo competitors

Santos, Luís; Fernández-Río, Javier; Iglesias-Soler, Eliseo; Blanco-Traba, Miguel; Jakobsen, Markus Due; González-Díez, Vicente; Franchini, Emerson; Gutiérrez, Carlos; Dopico-Calvo, Xurxo; Carballeira, Eduardo; Amonette, William E.; Suman, Oscar E.

doi:10.1080/14763141.2018.1461237

Cited by 7 publications

(10 citation statements)

References 37 publications

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“…The postural control during judo matches is an important aspect in the execution of throwing techniques ( Santos et al, 2018 ; Yoshitomi et al, 2006 ) or during the defense in both judo modalities (conventional and with visual impairment). However, in visually impaired athletes, the postural control has a greater peculiarity due to the low or no vision of the athletes ( Krabben et al, 2018 ).…”

Section: Discussionmentioning

confidence: 99%

“…According to Ruhe et al (2010) and Santos et al (2018) recommendations, three types of COP parameters were assessed: positioning, velocity, and dispersion. COP positioning was determined by computing the composite COP displacement length, area, and velocity.…”

Section: Methodsmentioning

confidence: 99%

“…The center of pressure (COP) is an accurate measurement to estimate the postural stability (balance) in standing position, and represents the point where the resultant force acts on the support surface ( Ruhe et al, 2010 ). Few studies have investigated the COP in judo athletes, as Santos et al (2018) who verified increase in COP displacement and velocity over a simulated judo match, and Yoshitomi et al (2006) , who found better postural control system (lower COP displacement and velocity) in judo athletes compared to nonathletes after an unexpected external perturbation.…”

Section: Introductionmentioning

confidence: 99%

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Neuromuscular and postural control in visually and nonvisually impaired judo athletes: case study

et al. 2019

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This study aimed to analyze neuromuscular and postural control in visually and nonvisually impaired judo athletes. Two judo athletes, one visually impaired and the other nonvisually impaired, participated in the study. The athletes presented similar demographic, anthropometric, and judo-technical characteristics. They performed maximal isometric handgrip strength (dominant and nondominant hand), vertical jumps (countermovement jump [CMJ] and squat jump [SJ]), and center of pressure assessment in three positions: neutral, anteroposterior, and judo combat base (Migi-shizentai). The main findings showed that the visually impaired athlete presented higher standing balance in the neutral and anteroposterior positions than non-visually impaired athlete (effect size [ES]>2.0). In the Migi-shizentai position, the disparity between both athletes was reduced, particularly in the displacement area (ES=0.52). The visually impaired athlete showed higher performance in the SJ but lesser performance in CMJ and handgrip strength tests than nonimpaired athlete (ES>2.0). We concluded that the postural stability was higher in the visually impaired athlete in the neutral and anteroposterior position, but similar to the nonvisually impaired athlete in Migi-shizentai position, possible due to the influence of judo practice. Moreover, the visually impaired athlete showed higher performance in the SJ than nonvisually impaired.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Neuromuscular and postural control in visually and nonvisually impaired judo athletes: case study

et al. 2019

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“…The present results show that the extra lightweight category had a lower frequency of the left antero-posterior dominant position (Hidari shizen hontai/Hidari hontai) than the other weight categories, while the half middleweight category presented lower values of the right antero-posterior and frontal dominant positions (Migi shizen hontai/Migi hontai and Shizen hontai/Jigo hontai, respectively). Athletes of both categories rapidly analyze their adversary and execute their anticipated gripping tactics, which has been recognized to be a key factor in technical efficacy (Imamura et al, 2007;Santos et al, 2017). However, a possible explanation for these differences presented in the results is the fact that the half middleweight group has a greater number of athletes in absolute volume participating in judo tournaments than the extra lightweight.…”

Section: Discussionmentioning

confidence: 92%

Making Decisions and Motor Actions with Technical Biomechanical Classifications in Male Judo Weight Categories

Soto

Aedo-Muñoz

Brito

et al. 2020

Journal of Human Kinetics

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The aim of the study was to compare motor action variables of judo combat phases and technical biomechanical assessment of the seven weight categories. The sample was composed of 638 bouts (176 of extra lightweight <66 kg, 289 of half lightweight 66 > 73 kg, 180 of lightweight 73 > 81 kg, 244 of half middleweight 81 > 90 kg, 174 of middleweight 81 > 90 kg, 151 of half heavyweight 90 > 100 kg and 142 of heavyweight >100 kg) during motor actions of approach, gripping, attack, defense and groundwork combat phases, verifying the interactions between them by Markov chains and comparisons by Kruskall-Wallis and Dunn post hoc tests (p ≤ .05). The results demonstrated that lighter weight categories showed higher approach phases than the heavyweight category, and the lightweight group demonstrated higher defensive action frequencies than the half lightweight category and heavyweight athletes. Heavyweight and middleweight categories demonstrated higher groundwork combat frequencies than lighter weights, and the heavyweight category showed higher pause frequencies than the lightweight category. Regarding the decision-making model, the main transitions presented by the Markov chains showed higher prevalence of the following combinations: gripping occurring before the lever and length attacks, lever attack followed by the length attack, and length attack occurring earlier than the groundwork phase.

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“…Postural stability is associated with inertial forces acting on the body and inertial characteristics of body segments. Therefore, postural stability is determined by body composition and structure [20,21]. In the literature, it is difficult to find similar studies in which body composition would be assessed with Tanita electrical bioimpedance and postural stability with Ac-cuGait AMTI.…”

Section: Discussionmentioning

confidence: 99%

Body Composition and Postural Stability in Goalkeepers of the Polish National Junior Handball Team

Wilczyński

2018

Polish Journal of Sport and Tourism

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Introduction. The aim of the study was to assess the relationship between the body composition and postural stability of goalkeepers representing the Polish National Junior Handball Team. Material and methods. Body composition was assessed by means of bioelectrical impedance analysis. Postural stability was examined using the AccuGait AMTI force platform. Results. The body composition of the subjects was correct. All of the subjects had very good postural stability. Postural sway was higher in the sagittal plane than in the frontal one. Path Length and Average COP Speed were significantly increased during the closedeyes trial. Only Fat Mass (%) and Fat Mass (kg) were significantly directly correlated with Area Ellipse (cm2) (OE, open eyes). Inverse correlations occurred between Fat-Free Mass (kg) and Average Load Point Y (cm) (OE) as well as Average Load Point Y (cm) (CE, closed eyes). Muscle Mass (kg) was significantly inversely correlated with Average Load Point Y (cm) (OE) and also with Average Load Point Y (cm) (CE). Body Mass Index correlated negatively only with Average Load Point Y (cm) (CE). Total Body Water (kg) was significantly inversely correlated with Average Load Point Y (cm) (OE) and also with Average Load Point Y (cm) (CE). However, Total Body Water (%) only correlated negatively with Area Ellipse (cm2) (OE). Conclusions. Postural stability was determined by the composition and structure of the body. Single-sided sports specialisation can lead to static disorders of the body during the developmental period discussed. Therefore, systematic tests are needed to monitor the body composition and postural stability of handball goalkeepers.

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Postural control and physiological responses to a simulated match in U-20 judo competitors

Cited by 7 publications

References 37 publications

Neuromuscular and postural control in visually and nonvisually impaired judo athletes: case study

Neuromuscular and postural control in visually and nonvisually impaired judo athletes: case study

Making Decisions and Motor Actions with Technical Biomechanical Classifications in Male Judo Weight Categories

Body Composition and Postural Stability in Goalkeepers of the Polish National Junior Handball Team

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