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Effect of the Level of Coordinated Motor Abilities on Performance in Junior Judokas

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Lech G., Jaworski J., Lyakh V., Krawczyk R.

Journal of Human Kinetics

2011

vol. 30

153-160

The main focus of this study was to identify coordinated motor abilities that affect fighting methods and performance in junior judokas. Subjects were selected for the study in consideration of their age, competition experience, body mass and prior sports level. Subjects' competition history was taken into consideration when analysing the effectiveness of current fight actions, and individual sports level was determined with consideration to rank in the analysed competitions.The study sought to determine the level of coordinated motor abilities of competitors. The scope of this analysis covered the following aspects: kinaesthetic differentiation, movement frequency, simple and selective reaction time (evoked by a visual or auditory stimulus), spatial orientation, visual-motor coordination, rhythmization, speed, accuracy and precision of movements and the ability to adapt movements and balance. A set of computer tests was employed for the analysis of all of the coordination abilities, while balance examinations were based on the Flamingo Balance Test. Finally, all relationships were determined based on the Spearman's rank correlation coefficient. It was observed that the activity of the contestants during the fight correlated with the ability to differentiate movements and speed, accuracy and precision of movement, whereas the achievement level during competition was connected with reaction time.

Muscle Torque and its Relation to Technique, Tactics, Sports Level and Age Group in Judo Contestants

100%

Lech G., Chwała W., Ambroży T., Sterkowicz S.

Journal of Human Kinetics

2015

vol. 45

issue 1

167-175

The aim of this study was to perform a comparative analysis of maximal muscle torques at individual stages of development of athletes and to determine the relationship between muscle torques, fighting methods and the level of sports performance. The activity of 25 judo contestants during judo combats and the effectiveness of actions were evaluated. Maximum muscle torques in flexors/extensors of the body trunk, shoulder, elbow, hip and knee joints were measured. The level of significance was set at p≤0.05; for multiple comparisons the Mann-Whitney U test, p≤0.016, was used. Intergroup differences in relative torques in five muscle groups studied (elbow extensors, shoulder flexors, knee flexors, knee extensors, hip flexors) were not significant. In cadets, relative maximum muscle torques in hip extensors correlated with the activity index (Spearman's r=0.756). In juniors, maximum relative torques in elbow flexors and knee flexors correlated with the activity index (r=0.73 and r=0.76, respectively). The effectiveness of actions correlated with relative maximum torque in elbow extensors (r=0.67). In seniors, the relative maximum muscle torque in shoulder flexors correlated with the activity index during the second part of the combat (r=0.821).

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2 Journal of Human Kinetics

1 2015

1 2011

2 Lech G.

1 Ambroży T.

1 Chwała W.

1 Jaworski J.

1 Krawczyk R.

1 Lyakh V.

1 Sterkowicz S.

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Effect of the Level of Coordinated Motor Abilities on Performance in Junior Judokas

Muscle Torque and its Relation to Technique, Tactics, Sports Level and Age Group in Judo Contestants