Purpose:To examine the effects of a school-based karate intervention on academic achievement,psychosocial functioning,and physical fitness in children aged 7-8 years.Methods:Twenty schools in 5 different European coun...Purpose:To examine the effects of a school-based karate intervention on academic achievement,psychosocial functioning,and physical fitness in children aged 7-8 years.Methods:Twenty schools in 5 different European countries(2 second-grade classrooms per school)participated in a cluster randomized controlled trial(Sport at School trial).Participants were assigned to either a control group,which continued with their habitual physical education lessons,or to an intervention group,which replaced these lessons with a 1-year karate intervention(Karate Mind and Movement program).A total of 721 children(344 girls and 377 boys,7.4±0.5 years old,mean±SD)completed the study,of which 333 and 388 were assigned to the control group and intervention group,respectively.Outcomes included academic performance(average grade),psychosocial functioning(Strengths and Difficulties Questionnaire for parents),and different markers of physical fitness(cardiorespiratory fitness,balance,and flexibility).Results:The intervention provided small but significant benefits compared to the control group for academic achievement(d=0.16;p=0.003),conduct problems(d=-0.28;p=0.003),cardiorespiratory fitness(d=0.36;p<0.001),and balance(d=0.24;p=0.015).There was a trend towards significant benefits for flexibility(d=0.24;p=0.056).No significant benefits were observed for other variables,including psychosocial difficulties,emotional symptoms,hyperactivity/inattention,peer problems,or prosocial behaviour(all p>0.05).Conclusion:A 1-year school-based karate intervention was effective in improving academic achievement,conduct problems,and physical fitness in primary school children.The results support the inclusion of karate during physical education lessons.展开更多
The research was conducted in order to determine specificity of motor dimensions of judo and karate athletes and their differences. In order to determine the specificity of the structure of the tested anthropological ...The research was conducted in order to determine specificity of motor dimensions of judo and karate athletes and their differences. In order to determine the specificity of the structure of the tested anthropological dimensions, the researchers examined 200 judo and karate athletes, members ofjudo and karate clubs of Serbia （about 100 judokas and about 100 karatekas）, aged 18 to 27 years. To assess motor abilities, the researchers used 16 motor tests selected according to the structural model, defined as a mechanism for movement structuring, mechanism for functional synergies and tonus regulation, mechanism for excitation intensity regulation, and a mechanism for excitation duration regulation. All the data in this research were processed at the Multidisciplinary Research Center, Faculty of Sport and Physical Education, University of Pristina, through the system of data processing software programs developed by Popovic. The algorithms and programs realized in the research are fully presented, and the results of the programs are analyzed.展开更多
Background：Recent studies demonstrate a slowdown in deterioration of cognitive functioning in old age through aerobic training.There is evidence that the combination of aerobic,balance,and coordination exercises lead...Background：Recent studies demonstrate a slowdown in deterioration of cognitive functioning in old age through aerobic training.There is evidence that the combination of aerobic,balance,and coordination exercises leads to an improvement or maintenance of cognitive functions.Such age-related exercises can especially be found in East Asian martial arts.The purpose of the current study is to verify whether karate training for older adults improves cognitive functioning and,if an improvement can be found,which cognitive field are influenced Methods：Eighty-nine older women and men（mean age：70 years） participated in this study.The participants were randomized into 2 intervention groups（karate group and fitnes group,duration of intervention：5 months） and a control group.All participants had to accomplish a cognitive test battery before and after the intervention.In a secondary study the karate group had an additional intervention for another 5 months.Results：The results show that there is a significan improvement in motor reactivity,stress tolerance,and divided attention only after the 5-month karate training period.Additionally,the results of the secondary study indicate further improvements after 10 months.Conclusion：The 5-month karate training can help to enhance attention,resilience,and motor reaction time,but a training period of 10 months is even more efficient展开更多
Background: Rare are the studies which treated the effect of training and successive fights of karate on haemodynamic and blood lactate concentrations responses. Objectives: To evaluate and analyze the aerobic capacit...Background: Rare are the studies which treated the effect of training and successive fights of karate on haemodynamic and blood lactate concentrations responses. Objectives: To evaluate and analyze the aerobic capacity of elite Congolese karate athletes, as well as their haemodynamic and blood lactate concentrations responses changes during Ruffier test and stimulated competition. Methods: Twelve karate athletes (6 seniors and 6 juniors) took part in the study. These karate athletes were selected within the national karate teams (senior and junior) of Congo-Brazzaville. Anthropometric, bioenergetic and haemodynamic (HR, SBP, DBP) parameters and blood lactate [La] concentrations were measured at rest, immediately after the end of Ruffier test and each fight (n = 3). Results: Peak aerobic power (PAP) and maximum oxygen uptake (VO2 max) values averaged 437 ± 23 watts and 57.61 ± 2.2 ml/kg/mn, values varying as function as age division (senior vs junior). The recovery index was 5.4 ± 3.4 for juniors and 6.8 ± 3.2 for seniors. SBP, HR and [La] concentrations increased significantly during fights, compared to the resting values. HRmax was 182.3 ± 1.6 bpm (89% theoretical HRmax) for seniors and 182.0 ± 13.5 bpm (86% theoretical HRmax) for juniors. Peak [La] concentrations were 10.3 ± 1.5 mmol/l for seniors and 10.8 ± 1.2 mmol/l for juniors. Conclusion: Congolese karate athletes call upon high levels of the anaerobic and aerobic capacities. The karate training program in Congo should emphasize more gold improvising lower body anaerobic power and endurance.展开更多
This text represents a research that by individual treatment explores the influence and effect of the so-called advanced karate training （combined training program for development of physical and mental skills） in s...This text represents a research that by individual treatment explores the influence and effect of the so-called advanced karate training （combined training program for development of physical and mental skills） in strengthening the person＇s tolerance to difficult and stressful situations. The aim of the research was to achieve optimal performance by the athletes during the kumite1 in karate. The research involved initial, control and final experiment, where the karate practitioners were focused on the training model given （group; n = 13） and working in a group with additional individual intensive sessions provided for each participant. All athletes were male contestants aged 26.4 - 6.8. The aim of the research was to explore how their performance can be influenced using psychological techniques during karate trainings, or how not to fall into one of the four undesirable states of mind called Shikai2. Results confirmed that the model of combined physical and mental training for athletes improves their physical skills and optimizes performance during competitions.展开更多
Aging leads to a general decline in body functions that affects quality of life. Sports practice is recommended as a means to attenuate the impact of the aging process. The aim of this study was to identify and analyz...Aging leads to a general decline in body functions that affects quality of life. Sports practice is recommended as a means to attenuate the impact of the aging process. The aim of this study was to identify and analyze the neuromuscular activity and its patterns on active karate practitioners and assess the effects of the aging process. Two groups of black belt male karate practitioners, one with nine practitioners over 50 years old and the other with 21 practitioners aged between 20-30 years old performed the frontal kick mae-geri. Kinematic and electromyographic data of five muscles were collected from the right leg. Results showed two distinct periods of muscular activation in the mae-geri performance, with similar muscles activity patterns between groups. Nevertheless, some differences were found in the muscles＇ activity onset and offset, in root mean square and in inter-muscle delay and co-contraction periods. Those differences indicated that aging affects the neuromuscular activity in the mae-geri performance of the oldest karate practitioners. Nevertheless, the results showed that lifelong practice of karate can preserve the quality of the neuromuscular activity in older practitioners when they perform a kick, and this could be associated with benefits to balance control.展开更多
Karate is a competition combat sport that will be present at the Olympic Games during the trials in Tokyo in 2020. Within its inner logic, this activity implies a system of scores that may lead to a specific modelling...Karate is a competition combat sport that will be present at the Olympic Games during the trials in Tokyo in 2020. Within its inner logic, this activity implies a system of scores that may lead to a specific modelling, to be unveiled and used when dealing with the search for performance. If we consider that various strategies all seem to be able to lead to victory within that zero-sum game, might there be a possible Nash equilibrium to look for, aiming at favouring some of them and minimising gains and losses？ Must one privilege offensive or defensive behaviours, provoke or wait？ In relation to new sporting rules, 309 combats have been observed in the light of their system of scores and our result reveal perspectives for training. Even though the results remain questionable and are still to be completed, they enable us to highlight propositions as to a modelling through the work of Biechy. The suboptimal equilibrium thus highlighted reminds us that this game remains solely based on a system of rivalry, within which predefined strategy and initiative are to be articulated.展开更多
Various networks exist in the world today including biological, social, information, and communication networks with the Internet as the largest network of all. One salient structural feature of these networks is the ...Various networks exist in the world today including biological, social, information, and communication networks with the Internet as the largest network of all. One salient structural feature of these networks is the formation of groups or communities of vertices that tend to be more connected to each other within the same group than to those outside. Therefore, the detection of these communities is a topic of great interest and importance in many applications and different algorithms including label propagation have been developed for such purpose. Speaker-listener label propagation algorithm (SLPA) enjoys almost linear time complexity, so desirable in dealing with large networks. As an extension of SLPA, this study presented a novel weighted label propagation algorithm (WLPA), which was tested on four real world social networks with known community structures including the famous Zachary's karate club network. Wilcoxon tests on the communities found in the karate club network by WLPA demonstrated an improved statistical significance over SLPA. Withthehelp of Wilcoxon tests again, we were able to determine the best possible formation of two communities in this network relative to the ground truth partition, which could be used as a new benchmark for assessing community detection algorithms. Finally WLPA predicted better communities than SLPA in two of the three additional real social networks, when compared to the ground truth.展开更多
基金supported by the Erasmus+program of the European Union(567201-EPP-1-2015-2-IT-SPO-SCP)supported by the University of Alcala(FPI2016)。
文摘Purpose:To examine the effects of a school-based karate intervention on academic achievement,psychosocial functioning,and physical fitness in children aged 7-8 years.Methods:Twenty schools in 5 different European countries(2 second-grade classrooms per school)participated in a cluster randomized controlled trial(Sport at School trial).Participants were assigned to either a control group,which continued with their habitual physical education lessons,or to an intervention group,which replaced these lessons with a 1-year karate intervention(Karate Mind and Movement program).A total of 721 children(344 girls and 377 boys,7.4±0.5 years old,mean±SD)completed the study,of which 333 and 388 were assigned to the control group and intervention group,respectively.Outcomes included academic performance(average grade),psychosocial functioning(Strengths and Difficulties Questionnaire for parents),and different markers of physical fitness(cardiorespiratory fitness,balance,and flexibility).Results:The intervention provided small but significant benefits compared to the control group for academic achievement(d=0.16;p=0.003),conduct problems(d=-0.28;p=0.003),cardiorespiratory fitness(d=0.36;p<0.001),and balance(d=0.24;p=0.015).There was a trend towards significant benefits for flexibility(d=0.24;p=0.056).No significant benefits were observed for other variables,including psychosocial difficulties,emotional symptoms,hyperactivity/inattention,peer problems,or prosocial behaviour(all p>0.05).Conclusion:A 1-year school-based karate intervention was effective in improving academic achievement,conduct problems,and physical fitness in primary school children.The results support the inclusion of karate during physical education lessons.
文摘The research was conducted in order to determine specificity of motor dimensions of judo and karate athletes and their differences. In order to determine the specificity of the structure of the tested anthropological dimensions, the researchers examined 200 judo and karate athletes, members ofjudo and karate clubs of Serbia （about 100 judokas and about 100 karatekas）, aged 18 to 27 years. To assess motor abilities, the researchers used 16 motor tests selected according to the structural model, defined as a mechanism for movement structuring, mechanism for functional synergies and tonus regulation, mechanism for excitation intensity regulation, and a mechanism for excitation duration regulation. All the data in this research were processed at the Multidisciplinary Research Center, Faculty of Sport and Physical Education, University of Pristina, through the system of data processing software programs developed by Popovic. The algorithms and programs realized in the research are fully presented, and the results of the programs are analyzed.
基金supported by the Otto-von-Gueicke-University Magdeburg,Germany
文摘Background：Recent studies demonstrate a slowdown in deterioration of cognitive functioning in old age through aerobic training.There is evidence that the combination of aerobic,balance,and coordination exercises leads to an improvement or maintenance of cognitive functions.Such age-related exercises can especially be found in East Asian martial arts.The purpose of the current study is to verify whether karate training for older adults improves cognitive functioning and,if an improvement can be found,which cognitive field are influenced Methods：Eighty-nine older women and men（mean age：70 years） participated in this study.The participants were randomized into 2 intervention groups（karate group and fitnes group,duration of intervention：5 months） and a control group.All participants had to accomplish a cognitive test battery before and after the intervention.In a secondary study the karate group had an additional intervention for another 5 months.Results：The results show that there is a significan improvement in motor reactivity,stress tolerance,and divided attention only after the 5-month karate training period.Additionally,the results of the secondary study indicate further improvements after 10 months.Conclusion：The 5-month karate training can help to enhance attention,resilience,and motor reaction time,but a training period of 10 months is even more efficient
文摘Background: Rare are the studies which treated the effect of training and successive fights of karate on haemodynamic and blood lactate concentrations responses. Objectives: To evaluate and analyze the aerobic capacity of elite Congolese karate athletes, as well as their haemodynamic and blood lactate concentrations responses changes during Ruffier test and stimulated competition. Methods: Twelve karate athletes (6 seniors and 6 juniors) took part in the study. These karate athletes were selected within the national karate teams (senior and junior) of Congo-Brazzaville. Anthropometric, bioenergetic and haemodynamic (HR, SBP, DBP) parameters and blood lactate [La] concentrations were measured at rest, immediately after the end of Ruffier test and each fight (n = 3). Results: Peak aerobic power (PAP) and maximum oxygen uptake (VO2 max) values averaged 437 ± 23 watts and 57.61 ± 2.2 ml/kg/mn, values varying as function as age division (senior vs junior). The recovery index was 5.4 ± 3.4 for juniors and 6.8 ± 3.2 for seniors. SBP, HR and [La] concentrations increased significantly during fights, compared to the resting values. HRmax was 182.3 ± 1.6 bpm (89% theoretical HRmax) for seniors and 182.0 ± 13.5 bpm (86% theoretical HRmax) for juniors. Peak [La] concentrations were 10.3 ± 1.5 mmol/l for seniors and 10.8 ± 1.2 mmol/l for juniors. Conclusion: Congolese karate athletes call upon high levels of the anaerobic and aerobic capacities. The karate training program in Congo should emphasize more gold improvising lower body anaerobic power and endurance.
文摘This text represents a research that by individual treatment explores the influence and effect of the so-called advanced karate training （combined training program for development of physical and mental skills） in strengthening the person＇s tolerance to difficult and stressful situations. The aim of the research was to achieve optimal performance by the athletes during the kumite1 in karate. The research involved initial, control and final experiment, where the karate practitioners were focused on the training model given （group; n = 13） and working in a group with additional individual intensive sessions provided for each participant. All athletes were male contestants aged 26.4 - 6.8. The aim of the research was to explore how their performance can be influenced using psychological techniques during karate trainings, or how not to fall into one of the four undesirable states of mind called Shikai2. Results confirmed that the model of combined physical and mental training for athletes improves their physical skills and optimizes performance during competitions.
文摘Aging leads to a general decline in body functions that affects quality of life. Sports practice is recommended as a means to attenuate the impact of the aging process. The aim of this study was to identify and analyze the neuromuscular activity and its patterns on active karate practitioners and assess the effects of the aging process. Two groups of black belt male karate practitioners, one with nine practitioners over 50 years old and the other with 21 practitioners aged between 20-30 years old performed the frontal kick mae-geri. Kinematic and electromyographic data of five muscles were collected from the right leg. Results showed two distinct periods of muscular activation in the mae-geri performance, with similar muscles activity patterns between groups. Nevertheless, some differences were found in the muscles＇ activity onset and offset, in root mean square and in inter-muscle delay and co-contraction periods. Those differences indicated that aging affects the neuromuscular activity in the mae-geri performance of the oldest karate practitioners. Nevertheless, the results showed that lifelong practice of karate can preserve the quality of the neuromuscular activity in older practitioners when they perform a kick, and this could be associated with benefits to balance control.
文摘Karate is a competition combat sport that will be present at the Olympic Games during the trials in Tokyo in 2020. Within its inner logic, this activity implies a system of scores that may lead to a specific modelling, to be unveiled and used when dealing with the search for performance. If we consider that various strategies all seem to be able to lead to victory within that zero-sum game, might there be a possible Nash equilibrium to look for, aiming at favouring some of them and minimising gains and losses？ Must one privilege offensive or defensive behaviours, provoke or wait？ In relation to new sporting rules, 309 combats have been observed in the light of their system of scores and our result reveal perspectives for training. Even though the results remain questionable and are still to be completed, they enable us to highlight propositions as to a modelling through the work of Biechy. The suboptimal equilibrium thus highlighted reminds us that this game remains solely based on a system of rivalry, within which predefined strategy and initiative are to be articulated.
文摘Various networks exist in the world today including biological, social, information, and communication networks with the Internet as the largest network of all. One salient structural feature of these networks is the formation of groups or communities of vertices that tend to be more connected to each other within the same group than to those outside. Therefore, the detection of these communities is a topic of great interest and importance in many applications and different algorithms including label propagation have been developed for such purpose. Speaker-listener label propagation algorithm (SLPA) enjoys almost linear time complexity, so desirable in dealing with large networks. As an extension of SLPA, this study presented a novel weighted label propagation algorithm (WLPA), which was tested on four real world social networks with known community structures including the famous Zachary's karate club network. Wilcoxon tests on the communities found in the karate club network by WLPA demonstrated an improved statistical significance over SLPA. Withthehelp of Wilcoxon tests again, we were able to determine the best possible formation of two communities in this network relative to the ground truth partition, which could be used as a new benchmark for assessing community detection algorithms. Finally WLPA predicted better communities than SLPA in two of the three additional real social networks, when compared to the ground truth.
