Full-text resources of PSJD and other databases are now available in the new Library of Science.
Visit https://bibliotekanauki.pl
Preferences help
Polish version English version Language
enabled [disable] Abstract
Number of results

Results found: 20

Number of results on page
first rewind previous Page / 1 next fast forward last

Search results

Search:
in the keywords:  judo
help Sort By:

help Limit search:
first rewind previous Page / 1 next fast forward last
1
Publication available in full text mode
Content available

Stan psychofizyczny judoków obrazowany pomiarem aktywności elektrodermalnej

100%
Bolach E., Mickiewicz K.
Polish Journal of Sports Medicine
|
2019
|
vol. 35(4)
179-184
EN
Background. Persons practicing judo are exposed to large neuromuscular excitation due to the nature of the effort they perform during the fight and during training. The stable psychophysical state of judokas seems, therefore, to be extremely important in achieving a high sporting level. The aim of the study was to evaluate the electrodermal activity (EDA) measured by the Ryodoraku method in judo players in comparison with the control group. Material and methods. The test group – 16 judo players subjected to two EDA measurement tests. The control group – 16 men, students of the University of Physical Education in Wroclaw, Poland. Results. In the initial test, no differences in EDA values were found between the control and the test groups. However, significant differences in results were noted in judokas after training. Greater excitation was found within the points located on the upper limbs. Conclusions. EDA measurement can be a useful diagnostic method for assessing the psychophysical condition of a player, which can make it easier for a sports team to make decisions related to proper training programming and recovery treatments.
PL
Wstęp. Osoby trenujące judo narażone są na duże pobudzenie nerwowo - mięśniowe ze względu na charakter wysiłku jaki wykonują podczas walki i w trakcie treningów. Stabilny stan psychofizyczny judoków wydaje się więc niezwykle istotny w osiąganiu wysokiego poziomu sportowego. Celem pracy była ocena aktywności elektrodermalnej (EDA) mierzonej metodą Ryodoraku u zawodników judo w porównaniu z grupą kontrolną. Materiał i metody. Grupa badana – 16 zawodników judo poddanych dwukrotnemu pomiarowi EDA. Grupa kontrolna – 16 mężczyzn, studentów Akademii Wychowania Fizycznego we Wrocławiu. Wyniki. W badaniu początkowym pomiędzy grupą kontrolną a badaną, nie stwierdzono zróżnicowania w zakresie wartości EDA. Istotne różnice wyników odnotowano natomiast u judoków po treningu. Wykazano większe pobudzenie w obrębie punktów zlokalizowanych na kończynach górnych. Wnioski. Pomiar EDA może być przydatną metodą diagnostyczną obrazowania stanu psychofizycznego zawodnika co może ułatwić zespołowi sportowemu podejmowanie decyzji związanych z właściwym programowaniem treningu oraz zabiegów regeneracyjnych.
2
Content available remote

Defensive actions of world top judoists

94%
Boguszewski D.
Journal of Human Kinetics
|
2011
|
vol. 27
111-122
EN
The objective of this work was to define and determine the effectiveness of defensive actions applied in judo fighting. The study was based on recordings of final fights from Olympic Games, World Championships and World Cup (2005-2008). Actions of female and male contestants participating in total of 56 fights were analyzed (to an accuracy of 10-second-periods of time). All actions, including attacks, counter-attacks and defense without counter-attack, were recorded and their effectiveness, preparatory actions, breaks and the referees' decisions were evaluated. Altogether fights of 95 contestants were subjected to analysis. According to the author's classification of defensive actions, 12 types of defense without counter-attack were defined as follows: (1) hand block, (2) hip block, (3) maneuvering around, (4) twist onto abdomen, (5) hand and hip block, (6) hand block and maneuvering around, (7) stepping aside, (8) separation from grasp, (9) leaving the mat, (10) leg entanglement, (11) bridge, (12) return to tachi-waza (escape from ne-waza). Types of defense most often applied according to the study - hand block and twist onto abdomen - were the least effective (93% and 70% respectively). Ashi-waza and te-waza were throws most often applied as counter-attack. However, sutemi-waza throws were most effectively (50%) applied. Highly effective counter-attacks (28%) should serve as a clue for coaches and athletes at the competitive level. The rules set forth by professor Jigoro Kano (among others: "give up in order to win") may not be adequate for today's competition.
3
Content available remote

Directions and ways of executing judo throws during judo contests as a control criterion of an individual’s training versatility

94%
Marek A., Radosław L., Mirosław S.
Baltic Journal of Health and Physical Activity
|
2012
|
vol. 4
|
issue 4
238-249
EN
Background: Symmetry of movement actions in sport is considered as an element of versatility which enlarges an individual’s technical and tactical capacity. Asymmetry usually limits this capacity and may also lead to overstrains of one side of the body and cause an injury. The research is done on health aspects and practical improvement in sport contest. Up-to-date research on judo contest effectiveness has been aimed at the ability of throwing into various directions. There is no material and data as compared to the directions of throwing and effective directions of the opponent’s attack. The purpose of this research was to find relationships between the directions of the executed throws and the side of competitors’ bodies used while throwing. Material/Methods: Within 2005-2010 1,968 judo contests were recorded by means of a graphic method of recording of a judo contest during 587 domestic and international judo competitions. 12 competitors (6 men and 6 women) were subject to our observations. The effectiveness of throws performed into 4 directions and of the used body side was determined on the grounds of the average number of points won or lost during a contest. Results: The effectiveness of judo throws performed to the left direction or by using the left side of the body is similar or higher to those performed to the other side. There is a relationship between the dominant part of the body while throwing and the directions of throwing, and the defense efficiency in relation to the directions and ways of executing throws by opponents. Conclusions: The effectiveness of the left attack directions and using the left side of the body may result from the training practice. It seems rational to find reasons for such high effectiveness of the
4
Content available remote

The Level of Aerobic and Anaerobic Capacity and the Results of a Special Mobility Fitness Test of Female Judo Competitors Aged 16-18 Years

94%
Wolska-Paczoska B.
Baltic Journal of Health and Physical Activity
|
2010
|
vol. 2
|
issue 2
124-131
EN
Background: The purpose of this work is to determine the correlation between the indexes of the special fitness test and the parameters of aerobic and anaerobic capacities of women judo competitors, during the preparation period to competitions.Material/Methods: The research material comprised of 15 female judo contestants either members of the Polish representatives in the junior team and the competitors the Pomeranian Province Team aged 16-18. In order to define the somatic characteristics, the height of the body and indices that characterize its mass and composition of body components were determined. In order to assess the aerobic capacity a test with increasing charge until the refusal of continuation of the test was applied, while the anaerobic capacity was assessed thanks to the application of 30 seconds Wingate Test (WAnT) with charge of lower limbs. Within the framework of the assessment of special mobility fitness, the Special Judo Fitness Test (SFJT) was applied. An analysis of correlation between the anthropometric indices and SJFT indices was carried out; besides that a correlation between the indices of aerobic and anaerobic capacity and the results of the special mobility fitness test were analyzed.Results: The indicators of special fitness test moderately correlated both with the indicators of aerobic and anaerobic capacity; however, the most clear dependencies concerned relative values of the maximum power. The tested female competitors at the beginning of the preparatory period achieved definitely lower values of indicators characterizing aerobic and anaerobic capacity in comparison to the results of other tests.Conclusions: The presented dependencies give background to presume that at the level of directed training of female judo competitors in order to further raise their sport effectiveness, it seems adequate to pay more attention to preparation of special character whereby general physical preparation should also be directed to specialization.
5
Content available remote

The Contest Effectiveness of the Men's National Judo Team of Japan, and Character of Their Technical-Tactical Preparation during the World Judo Championships 2010

94%
Adam M., Tyszkowski S., Smaruj M.
Baltic Journal of Health and Physical Activity
|
2011
|
vol. 3
|
issue 1
65-74
EN
Background: The aim of our research was to determine the contest effectiveness of Japanese judo competitors and to state the quantitative an qualitative indices of the tactical-technical preparation (PTT). The values of these indices may be used for controlling the process of special preparation.Material/Methods: Medal classification of the national teams from all Olympic Games and World Championships, and contest effectiveness of the national teams during 2007-2010 were determined. The analysis of PTT indices of 16 Japanese competitors was carried out. They fought 78 contests during the World Championships 2010. Predominant techniques were described. The selected indices have been assessed.Results: Japanese competitors prevailed over their opponents in the men's group during the Olympic Games and the World Championships. After changing sport rules in judo, they overcame their poor performance within 2007-2009, and they have become leaders in world's judo. Japanese competitors are highly effective in leg throws, especially in such throws as: uchimata, osoto gari, and kouchi gari as well as seoi nage (although this throw is a hand technique). They executed throws forwards and mainly by means of pivot. Japanese competitors had a positive value of activity indices and high indices of defense.Conclusions: Sport results achieved by Japanese judo competitors prove their high contest performance and the dominating position in judo competitions. Among their dominating techniques, we can see leg techniques performed by pivoting and breaking balance forwards on toes. They are also effective in executing grappling techniques such as holdings (immobilizations) for example. During the World Championships in 2010 Japanese competitors were characterized by a positive value of activity indices and high indices of defence.
6
Content available remote

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

94%
Lech G., Jaworski J., Lyakh V., Krawczyk R.
Journal of Human Kinetics
|
2011
|
vol. 30
153-160
EN
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.
7
Content available remote

Relations between Bioelectrical Muscles Activity and Isokinetic Strength Parameters in 17-19-Year-Old Judoists

94%
Dornowski M.
Baltic Journal of Health and Physical Activity
|
2010
|
vol. 2
|
issue 1
43-48
EN
Background: Muscle strength as an element of preparation and sport competition is one of the most important aspects in technical and tactical efficiency. The aim of this study was to define the level of relation between bioelectrical muscle activity and isokinetic strength parameters in 17-19-year-old judoists.Material/Methods: 30 judo athletes (17-19-year-old) took part in the research. The research was conducted in Gdańsk Academy of Physical Education and Sport Laboratory during 2006-2008. In the research authors used: to evaluate the isokinetic strength level, "Concept 2 Dyno" device was used in the research, along with surface summary electrical bio-potentials reading on EMG AMT-8 CDN BORTEC BIOMEDICAL with ACQ software.Results: In the upper right limb there are more statistical significant correlations between isokinetic strength parameters and electrical muscle activities.In the lower limbs measurement of the left leg shows more significant correlations.Conclusions: Comparing the upper and lower limbs, it was noticed that the isokinetic strength parameters of the upper limbs are more correlated with the measured muscle electrical activities.Regarding the left and the right side comparison, the right side (the upper and the lower limb) isokinetic strength parameters are more correlated with the measured muscle activities.
8
Content available remote

Defensive Actions of Contestants during Polish Judo Championships in the Years 2005-2008

94%
Boguszewski D.
Baltic Journal of Health and Physical Activity
|
2009
|
vol. 1
|
issue 2
111-117
EN
Background: The objective of this work was to define and determine the effectiveness of defensive actions applied in judo fighting.Material/Methods: The study was based on video and DVD recordings of fights during Polish Championship finals in the years 2005-2008. Actions of female and male contestants participating in the total of 56 fights were analyzed (to an accuracy of 10-second periods of time). All actions: attacks, counter-attacks and defense without counter-attack were recorded and their effectiveness, preparatory actions, breaks and referees' decisions were analyzed. Altogether 69 fights of female and male contestants were subject to analysis.According to the author's classification of defensive actions, 12 types of defense without counter-attack were defined as follows: (1) hand block, (2) hip block, (3) maneuvering around, (4) twist onto belly, (5) hand and hip block, (6) hand block and maneuvering around, (7) stepping aside, (8) separation from grasp, (9) leaving the mat, (10) leg entanglement, (11) bridge, (12) return to tachi-waza (escape from ne-waza).Results: The types of defense most often applied according to the study - hand block and twist onto belly - were the least effective (86% and 66% accordingly).Ashi-waza i sutemi-waza were throws most often applied as counter-attack. Sutemi-waza (44%) throws were most effectively applied.Leg and hand throws were the most frequent and most effective counter-attack throws. O-goshi throw appeared to be counter-effective most often - not less than every fourth one was successfully counter-attacked.Conclusions: High effectiveness of counter-attacks (29%) should be the tip for coaches and contestants to carry out professional trainings, which follows (and not the other way round as it used to be) the rules set forth by professor Jigoro Kano (among others: "give up in order to win"). Moreover, trainings of defensive skills should be modified since defense actions most often applied by Judoka players (hand block and twist onto belly) proved to be the least effective.
9
Content available remote

A Profile of Adriana Dadci's Individual Technical-Tactical Preparation

94%
Adam M.
Baltic Journal of Health and Physical Activity
|
2012
|
vol. 4
|
issue 1
35-43
EN
Background: Since the first women's judo championships in 1980 work connected with an analysis and an assessment of their preparation has been carried on. Polish and foreign researchers have determined the particulars of women's technical-tactical preparation (TTP). Adrianna Dadci was Poland's representative in women's judo, who successfully participated in many international competitions. She won the gold medal at the European Championships in 2002 and took the 3rd place at the European championships in 2001. She won five times at international tournaments within 2002-2004, which are now known as the World Cups. She was the Champion of Poland seven times. The purpose of this research was to determine Adrianna Dadci's, one of the best Polish judo competitors, individual profile of technical-tactical preparation.Material/Methods: 123 contests played by Adranna Dadci within 2002-2004 during 33 judo sport competitions were analyzed (119 contests were subject to analysis).Results: Dadci efficiently performed 146 attacks gaining 1047 referee's points. She effectively used 20 judo techniques. The ouchi gari and an uchimata throws were her favorite techniques, effectively executed by the right side of her body as well as the juji gatame armlock. She was very efficient in executing katame waza techniques (grappling techniques) and ashi waza (leg throws).Conclusions: A profile of technical-tactical preparation of one of the best women's judo competitors is an important factor in determining the standard value.Adriana Dadci's value of indices (TTP) may be used as a criterion for controlling individual training in women's judo competitors.
10
Content available remote

Muscle Strength and Technical Skills in 17-19-Year-Old Judoists

94%
Dornowski M., Jagiełło W., Smaruj M.
Baltic Journal of Health and Physical Activity
|
2011
|
vol. 3
|
issue 4
262-268
EN
Background: The aim of this study was to define the relationships between different kinds of muscle strength manifestations and technical skills (selected throwing techniques) in 17-19-year-old judoists.Material/Methods: Results of measurements taken in 2006-2008 at the Physical Effort Lab in the Gdansk University of Physical Education and Sport were taken under consideration. 30 male judo athletes (17-19-year-old) participated in the study. They all were students of Comprehensive Sports School - with the judo profile and athletes representing clubs from Pomerania and Warmia-Masuria Provinces.An ergometric device "Concept 2 Dyno" was used in the measurements of isotonic strength and strength endurance. In the measurement of static strength an electronic dynamometer ERGO METER was used. To evaluate the level of technical skills (throws), the method of expert evaluation was used (coach evaluation).Results: Using regression analysis results, which revealed the most significant relationships between variables presented in percentage value, relation's topographies of particular types of muscle strength were created. They form an applicable, transparent and ready-to-use in training process form for coaches. They point to these elements of strength preparation on which the training process should be primarily focused and during measurement intervals as well.Conclusions: Interpretation and synthesis of the results showed relationships of 10 technical skills (throws) with muscle strength in 17-19-year-old judoists in three out of four types: isotonic strength, strength endurance and static strength. These skills were included in hand throws - 2, foot - 1, hip - 3 and sacrifice - 4. Jump force remained with no significant relationships.The results of this study can be used in the training process of 17-19-year-old judoists. Following technical skills (throws) were characterized: tai-otoshi, seoi-nage, kosoto-gari, uki-goshi, tsuri-goshi, ushiro-goshi, tani-otoshi, osoto-makikomi, yokootoshi, yoko-guruma.
11
Content available remote

Somatotype Variables Related to Muscle Torque and Power in Judoists

94%
Lewandowska J., Buśko K., Pastuszak A., Boguszewska K.
Journal of Human Kinetics
|
2011
|
vol. 30
21-28
EN
The purpose of this study was to examine the relationship between somatotype, muscle torque and power output in judoists. Thirteen judoists (age 18.4±3.1 years, body height 178.6±8.2 cm, body mass 82.3±15.9 kg) volunteered to participate in this study. Somatotype was determined using the Heath-Carter method. Maximal muscle torques of elbow, shoulder, knee, hip and trunk flexors as well as extensors were measured under static conditions. Power outputs were measured in 5 maximal cycle ergometer exercise bouts, 10 s each, at increasing external loads equal to 2.5, 5.0, 7.5, 10.0 and 12.5% of body weight. The Pearson's correlation coefficients were calculated between all parameters. The mean somatotype of judoists was: 3.5-5.9-1.8 (values for endomorphy, mesomorphy and ectomorphy, respectively). The values (mean±SD) of sum of muscle torque of ten muscle groups (TOTAL) was 3702.2±862.9 N × m. The power output ranged from 393.2±79.4 to 1077.2±275.4 W. The values of sum of muscle torque of right and left upper extremities (SUE), sum of muscle torque of right and left lower extremities (SLE), sum of muscle torque of the trunk (ST) and TOTAL were significantly correlated with the mesomorphic component (0.68, 0.80, 0.71 and 0.78, respectively). The ectomorphic component correlated significantly with values of SUE, SLE, ST and TOTAL (-0.69, -0.81, -0.71 and -0.79, respectively). Power output was also strongly correlated with both mesomorphy (positively) and ectomorphy (negatively). The results indicated that the values of mesomorphic and ectomorphic somatotype components influence muscle torque and power output, thus body build could be an important factor affecting results in judo.
12
Content available remote

A Profile of Joanna Majdan's Individual Technical-Tactical Preparation

94%
Adam M., Majdan J.
Baltic Journal of Health and Physical Activity
|
2011
|
vol. 3
|
issue 4
269-276
EN
Background: Since the first women's judo championships in 1980 research connected with an analysis and an assessment of their preparation has been carried on. Polish and foreign research has attempted to determine the particulars of women's technicaltactical preparation (PTT).Joanna Majdan was the first Poland's judo competitor who succeeded in judo in international tournaments. She won a medal in 1984 (3rd place) and took the 5th place in the 1982 World Championships. She won three medals at individual European Championships (1986, 1988, 1989) and in 1986 she was the World's University Champion; during the World University Championships she won bronze medals three times in 1984, 1988 and in 1990. Nine times she secured her championship titles during individual Poland's Championships.The purpose of this study was to determine an individual profile of her technicaltactical preparation.Material/Methods: 202 contests played within 1988-1993 during 55 sport judo competitions were analyzed. Within the analyzed period she performed efficiently 232 attacks scoring 1,486 referee's points.Results: She effectively used 22 judo techniques. A seoi nage was her favorite throw which she effectively executed using both the right and left sides of her body.Conclusions: Her individual profile connected with technical-tactical preparation is an important factor in searching for the model value. The PTT value achieved by Joanna Majdan may be used as a criterion for controlling in individual training of female judo competitors.
13
Publication available in full text mode
Content available

Assessment of approaches to pre-start stress coping in judo competitors

84%
Szczuka E., Piotrowski T., Stefaniak T.
Polish Journal of Sports Medicine
|
2021
|
vol. 37(3)
147-157
PL
Wstęp. Zarówno codzienny reżim treningowy, jak i sam udział w zawodach jest dla sportowca źródłem wielu trudnych emocjonalnie sytuacji. Zawodnik, który chce odnosić sukcesy powinien posiadać umiejętność radzenia sobie z tego rodzaju przeciwnościami. U niektórych zawodników stres sam w sobie może być bodźcem motywującym, choć w praktyce zależy to od wielu czynników. Celem badań było poznanie i scharakteryzowanie metod wykorzystywanych przez wrocławskich judoków w celu minimalizowania natężenia stresu przedstartowego. Materiał i metody. W eksperymencie uczestniczyły 54 osoby uprawiające judo w kilku wrocławskich klubach. Osoby badane były w wieku od 8 do 22 lat. W pracy wykorzystano metodę sondażu diagnostycznego opartą o techniki kwestionariuszowo-ankietowe. W anonimowej ankiecie zawarte były pytania o występowanie stresu przedstartowego, metody minimalizacji stresu, rodzaj odczuwanego stresu oraz okoliczności, w których występuje maksymalny jego poziom. Wyniki. Aby zminimalizować poziom stresu przedstartowego badani rozmawiają głównie ze znajomymi, słuchają muzyki, oglądają telewizję, grają w gry komputerowe lub wykonują ćwiczenia fizyczne. Tylko niewielka część zawodników stosuje techniki relaksacyjne przed startem w zawodach. Wnioski. Istnieje konieczność wprowadzenia do treningu zawodników judo bardziej zróżnicowanych, specjalistycznych strategii i technik radzenia sobie ze stresem. Permanentna edukacja trenera w tym zakresie jest niezwykle istotna, ponieważ pełni on, jak wskazują przeprowadzone badania, istotną rolę w regulacji stanów emocjonalnych zawodnika.
EN
Background. Both everyday training regime and participation in competitions itself are for athletes sources of multiple emotionally-difficult circumstances. A competitor who would like to succeed should know how to cope with such problems. For some competitors, stress itself can be a motivating stimulus, although, in practice, it depends on multiple factors. The aim of the study was presentation and description of the approaches used by Wroclaw judo competitors in order to minimize pre-start stress accumulation. Material and methods. 54 judo trainees from Wroclaw clubs participated in the experiment. Diagnostic opinion poll was used, based on questionnaires and surveys. The anonymous survey included questions concerning the presence of pre-start stress, approaches to stress minimization, the type of stress and the circumstances under which stress reaches its maximal levels. Results. In order to minimize the level of pre-start stress, the participants talk mainly with their friends, listen to music, watch TV, play computer games or exercise. Only a small part of competitors use relaxation techniques prior to competitions. Conclusions. It is necessary to introduce more diverse specialist strategies and stress coping techniques to judo training. Permanent coach education in this domain is essential since, based on the study results, their role in regulation of the competitor’s emotional states is essential.
14
Content available remote

The Level of Aerobic and Anaerobic Capacity and the Results of a Special Mobility Fitness Test of Female Judo Contestants

83%
Wolska B., Smulskij V., Jagiełło W.
Baltic Journal of Health and Physical Activity
|
2009
|
vol. 1
|
issue 2
105-110
EN
Background: The purpose of this work is to determine the correlation between the indexes of the special fitness test and the parameters of aerobic and anaerobic capacities of women judo competitors during the preparation to the competitive period.Material/Methods: In the research presented in the paper the level of aerobic and anaerobic capacity and the results of a special mobility fitness test of female judo contestants, either members of the Olympic and National Teams or their immediate reserves, was determined (n=11). In order to assess the aerobic capacity a test with increasing load until the refusal to continue the test was applied, while the anaerobic capacity was assessed thanks to the application of 30 seconds Wingate Test with a load on lower limbs. Within the framework of the assessment of special mobility fitness, the Special Judo Fitness Test (SFJT) was applied.Results: An analysis of correlation between the anthropometric indices and SJFT indices was carried out; besides that a correlation between the indices of aerobic and anaerobic capacity and the results of the special mobility fitness test were analyzed.Conclusions: On the basis of analysis of the empirical material it was determined that the indices of special mobility fitness test clearly correlated with the relative values of indices that characterized the aerobic and anaerobic capacity. A lower level of indices of aerobic and anaerobic capacity in comparison with results obtained by other authors was observed, while the indices diagnosing the level of special fitness of female judo contestants had a higher value.
15
Content available remote

Muscle Activation Profiles of Lower Extremities in Different Throwing Techniques and in Jumping Performance in Elite and Novice Greek Judo Athletes

83%
Zaggelidis G., Lazaridis S.
Journal of Human Kinetics
|
2013
|
vol. 37
|
issue 1
63-70
EN
The aim of this study was to examine the neuromuscular adaptations of knee muscles during hip throwing techniques and vertical jumps in elite and novice Greek judokas. Ten elite and ten novice judokas performed two hip throws and different vertical jumping tasks. Surface electromyograms were recorded from vastus lateralis and biceps femoris muscles along with generated kinetics. Elite judokas revealed higher EMG activity of agonist muscles during throws and jumps but lower co-activation levels. Better jumping performance, better utilisation of the stretch-shortening cycle mechanism, higher and earlier generated pushoff forces and shorter contact time periods characterized elite judokas. Total neuromuscular activation that adopt elite judokas reveals a more mature and skill dependent strategy compared to novice ones.
16
Content available remote

Jumping Abilities and Power-Velocity Relationship in Judo Athletes: Comparative Analysis Among Age Categories

83%
Buśko K.
Human Movement
|
2015
|
vol. 16
|
issue 2
78-82
EN
Purpose. The aim of the study was to examine age differences in the maximal power and height of rise of the body mass centre measured in spike jump (SPJ) and counter-movement jump (CMJ), and power-velocity relationship of lower extremities between cadet and U23 age class judo athletes. Methods. Seven cadets (age 16.6 ± 0.7 years) and eight U23 age class (21.3 ± 1.4 years) Polish judoists took part in the study. The maximal power and height of jump were measured at SPJ and CMJ jumps. Power- velocity relations (P-v) were determined from 5 maximal cycle ergometer exercise bouts at increasing external loads equal to 2.5, 5.0, 7.5, 10.0 and 12.5% of body weight (BW). Results. Cadet judoists had a significantly smaller maximal power output (11.56 ± 1.21 W ・ kg-1) than U23 athletes (12.69 ± 0.67 W ・ kg-1). The optimal velocity was similar in both group (119.3 ± 16.0 rpm and 119.6 ± 15.5 rpm, respectively). Significant age differences were founded between the cadet and U23 athletes for power output at external load equal 12.5% BW. Cadet judoists generated insignificantly lower maximal power in CMJ and SPJ than U23 judo athletes with except of the absolute maximal power in SPJ. The age difference was observed in height of CMJ. Conclusions. Based on the characteristics of F-v curve we can see in which direction follow the effects of training. Application of CMJ and SPJ in jumping test allows to assess changes in neuromuscular coordination. The use of the both methods give better information to optimal training control.
17
Content available remote

Strength Parameters in Judo Athletes: An Approach Using Hand Dominance and Weight Categories

83%
Detanico D., Budal Arins F., Dal Pupo J., Dos Santos S. G.
Human Movement
|
2012
|
vol. 13
|
issue 4
330-336
EN
Purpose. This study aimed to relate strength parameters of the judogi pull test and countermovement jump (CMJ), and body fat with body mass and to compare strength parameters in the judogi pull test between the dominant and non-dominant hands. Methods. Eighteen male judokas took part in this study. The following parameters were analysed: maximal force (Fmax), time to maximal force (TFmax), rate of force development (RFD) and rate of peak force decrement (RPFD) of the dominant and nondominant hands during the pull test. Jump height (Hmax), power, Fmax, peak velocity (PV) and RFD in the CMJ were also measured. A t-test and Pearson’s correlation were used. Results. Fmax (absolute and relative) and RFD were greater for the dominant hand, whereas RFPD was greater for the non-dominant hand during the pull test. There was a significant correlation only between absolute Fmax and body mass (r = 0.51) in the pull test. For the CMJ, relative power (r = -0.57), Hmax (r = -0.49) and PV (r = -0.53) were negatively correlated with body mass, while absolute Fmax (r = 0.84) and power (r = 0.69) were positively correlated with body mass. A significant correlation between body mass and body fat (r = 0.88) was found. Conclusions. There are differences in maximal and explosive force and the rate of peak force decrement between the dominant and non-dominant hand. Absolute values of power and maximal force increased according to body mass (and, therefore, a higher weight category); however jump performance decreased with an increase in body mass (weight category).
18
Content available remote

Changes of Maximal Muscle Torque and Maximal Power Output of Lower Extremities in Male Judoists During Training

71%
Buśko K., Nowak A.
Human Movement
|
2008
|
vol. 9
|
issue 2
111-115
EN
Purpose. The aim of the study was to follow changes of the maximal muscle torque and maximal power output of lower extremities in male judoists during pre-competition training (PCT). The original hypothesis assumed that different training loads would cause changes of the maximal muscle torque and maximal power output of legs in male judoists during pre-competition training, but not changes of the topography of the maximal muscle torque in all muscle groups. Basic procedures. The study sample consisted of five male judoists from the Polish National Team. Muscle torque measurements in static conditions were performed shortly before PCT (I), after the strength training mesocycle (II) and immediately after PCT (III). Ten muscle groups were examined: flexors and extensors of the trunk, shoulder, elbow, hip and knee. The maximal power output of legs was measured on a dynamometric platform during counter-movement jumps (CMJ) and bounce counter-movement jumps (BCMJ). Main findings. The sums of the muscle torque of both arms and the trunk were changed insignificantly during pre-competition training (PCT). The sum of muscle torque of the right and left lower extremities increased significantly between the measurements I and III. The muscle percent topography of muscle groups also showed significant changes. Maximal power output of lower extremities measured during CMJ decreased significantly, but increased during BCMJ. Conclusion. PCT caused changes of the maximal muscle torque of lower extremities, but the muscle topography of the muscle groups revealed significant changes, too. The maximal power output of lower extremities measured during CMJ decreased.
19
Publication available in full text mode
Content available

A comparison of karateka’s and judoka’s foot arch dynamics

71%
Šenkýř J., Čihounková J., Reguli Z.
Physical Activity Review
|
2016
|
vol. 4
172-177
EN
The benefits of barefoot walking is widely known. Our purpose was to examine the foot arch dynamics of sportsmen, who perform barefooted. The research sample consists of 25 skilled male judoka and 25 karateka (age 18 - 32 years, minimum 6 hours of training a week). We used navicular drop test to determine the level of foot arch dynamics. Results showed the significant differences between left and right foot of judoka and karateka and between two groups of participants as well (judoka ́s foot arch dynamics is bigger than karateka ́s). The differences could be caused by different way of shifting, diff erent softness of the mats and different dynamics of each performance.
20
Content available remote

Susceptibility To Injury During Falls In Women Practising Combat Sports And Martial Arts

60%
Boguszewski D., Adamczyk J. G., Kerbaum K., Antoniak B., Obszyńska-Litwiniec A., Białoszewski D.
Polish Journal of Sport and Tourism
|
2015
|
vol. 22
|
issue 1
15-19
EN
Introduction. Martial arts and combat sports are practical sports that are being practised by an increasing number of women. The aim of this study was to examine the relationship between the ability of female judo, taekwondo and karate competitors to fall safely and their susceptibility to injuries during falls. Material and methods. A total of 120 persons participated in the research. The study group consisted of 45 female judo, taekwondo (WTF) and karate Shotokan competitors; in the control group there were 75 persons who did not practise sport professionally. The research tools included the Test of Susceptibility to Injury during Falls (TSIDF) developed by Kalina and a questionnaire designed by the authors. Results. The female martial arts competitors had considerably lower TSIDF results (p<0.001), which means that they made fewer errors when performing motor tasks. The mean result of the TSIDF was 2.48 for the study group and 6.08 for the control one. Significant differences (p<0.001) were found between the groups for all types of errors and all of the motor tasks. Conclusions. Women practising combat sports and martial arts made significantly fewer errors in the Test of Susceptibility to Injuries During Falls, which can be seen as evidence for the practical usefulness of the training they are undergoing.
first rewind previous Page / 1 next fast forward last
JavaScript is turned off in your web browser. Turn it on to take full advantage of this site, then refresh the page.