جستجوی مقالات مرتبط با کلیدواژه "کاتا" در نشریات گروه "تربیت بدنی"

Movement and balance skills of children with attention deficit/hyperactivity disorder are weaker than normal children. The purpose of this study was to investigate the effectiveness of a course of kata exercises on static and dynamic balance in children with attention deficit/hyperactivity disorder.

This research was semi-experimental. The statistical population of the current study was all female children aged 10 to 12 years old with attention deficit/hyperactivity disorder in Hamadan city. The subjects of this research were 30 children who were selected by convenience sampling. At first, the characteristics of body measurements and static and dynamic balance pre-tests of children were recorded. After matching, subjects were randomly assigned to two control or experimental groups of 15 individuals. Then the participants of the experimental group participated in the protocol of kata exercises for 12 weeks and three sessions per week. After the last training session, the post-test of static and dynamic balance were measured in the same conditions as the pre-test. Independent and dependent t-tests were used to analyze the data.

12 weeks of kata exercises led to a significant increase in static balance with the dominant leg (P<0.001), static balance with the non-dominant leg (P<0/001) and dynamic balance in different directions (P<0.001) in children with attention deficit/hyperactivity disorder in Hamedan.

Therefore, it can be concluded that kata exercises can be a useful training method to help children with attention deficit hyperactivity disorder to improve their static and dynamic balance.

The effects of 14 weeks of kata versus aerocombat training on social interactions of children with autism spectrum disorders (ASD) were investigated. The study included 54 eligible children whom they assigned to kata , or aerocombat or no-exercise control group . Participants of the exercise groups received kata techniques or aerocombat instructions three times per week for 14 weeks (42 sessions). The social interaction were assessed at baseline, week 14, and at one month follow up in the three groups via the social dysfunction sunscale of Gilliam,Autism Rating Scale-Second Edition (GARS-2). Statistical analyses were performed with a repeated measures of analysis of variance, a one-way analysis of variance a paired t-test, and an idependent t-test. Results showed that both kata techniques and aerocombat training improved social interactions of the two exercise groups. It was also found that aerocombat exercises played more prominent role in improving social interactions than kata techniques. After 30 days of no practice social interaction in the exercise groups remained significantly decreased compared to pre-intervention time. The participants of the control group did not show significant changes in the outcome variable. It seems that teaching kata techniques and aerocombat exercises to children with ASD consistently improves their social interactions The role played by aerocombat training in improving social interactions was significantly greater than kata . Iit should be noted that the nature of martial arts could be considered as a key option in prescribing martial arts based interventions in children with ASD for improving their social interactions.

 

Nonspecific low back pain is one of the most common types of low back pain. The majority of people in the community suffer from this complication at least once in their lifetime. The aim of this study was to compare the prevalence, severity and disability caused by nonspecific low back pain in elite katareka(kata) men and women in Iran.

For this purpose, 94 elite katareka(kata) in Iran (mean ± SD; 23.31±4.74 years, height 167.39±6.70 cm and weight 65.13±9.37 kg) participated in the present study. To measure pain intensity, disability rate and pain measurement, online questionnaires of Quebec pain intensity, oswestry disability rate were used, respectively. Chi-square test were used to analyze the data.

The results showed that there was a significant difference between the prevalence of nonspecific low back pain among elite male and female katareka(kata) in Iran (ƛ2 = 14.11, p = 0.001). While there was a significant difference in the severity of nonspecific low back pain (ƛ2 = 0.53, p = 0.46) and disability due to nonspecific low back pain (ƛ2 = 2/66, p = 0/26) There is no elite male and female catharsis in the country.

According to the results of the present study, nonspecific back pain is more common in men. In this regard, it is suggested that the identification of high-risk techniques as well as the modification of relevant techniques in the group be done with more emphasis.

The aim of the present study was to investigate the effect of one-month common trainings in karate including strength, aerobic and kata trainings on hip and knee flexion and extension torque, muscular endurance, aerobic and anaerobic power, body composition and performance of kata international champions of Iranian three-man kata team with a history of championship in World and Asian leagues. These kata athletes with age of 31.5±3 years, body mass index of 25.5±1.5 kg/m2, and body fat of 12.5±1.5% participated in one-month trainings including eight aerobic sessions, six strength sessions, six technique and kata sessions and four combination sessions (strength and aerobics). Various descriptive statistical tools such as mean, standard deviation and individual and team percentage changes were used to compare pre- and post-test information. The results showed a significant increase in all moments. There was also a significant increase in muscular endurance rates associated with half-squat with body weight (50%), bench press with 0.8% body weight (19.5%), chin up (33.5%), and a relatively strong to strong improvement was observed in the performance of kata. Nevertheless, there were no significant changes in body composition, aerobic power (1600 m running) and anaerobic power (Sargent jump). It seems that despite the usefulness of conventional karate trainings, special attention should be paid to individual needs, adequate diet and supplementary trainings for greater effectiveness.

With regard to the effects of postural fatigue on the amount of participation in sport activities and as this may result in impaired motor functioning, the aim of this study was to investigate the effect of fatigue on static and dynamic balance in karate kata and kumite elite men.
The statistical population consist of all karate kata and kumite National Karate team members in 2015-16, which involved 20 men. The sample of the study included 16 athletes with average age of 20.4 ± 23.75 years, all of whom were healthy. Static and dynamic balance was measured before and after the exercise protocol, including a severe karate training session. Static postural stability indices including mean center of pressure displacement (COP) and velocity of COP displacements (COP VEL) Direction of medial-lateral (ML) and anterior-posterior (AP), were measured in standing position on one leg. In order to evaluate the dynamic postural stability index (DPSI), the jump-landing task was used on the 1000-Hz Kistler force plate. Inferential statistics which were used to compare pre and post-test data in order to compare the effect of fatigue in kata and kumite groups at a significant level of 0.05, including paired samples t-test and covariance analysis.
The findings indicated that fatigue caused by intense training would significantly affect the static and dynamic balance in karate kata and kumite elite men (P Based on the results of the study, it can be recommended that coaches and athletes consider the negative effects of fatigue in intensive training sessions on static and dynamic balance. Since practically there is not much differences between different exercise in kata and kumite. It is recommended that the exercise program be used to delay fatigue in order to reduce the risk of musculoskeletal damage.

The aim of this study was to compare the plantar pressure distribution of dominant and non-dominant legs of females who were participated in the kata and kumite national team.
Twelve kumite and 8 kata female athletes of the Karate national team participated in this study. Plantar pressure was measured using emed platform during barefoot walking. After dividing the foot into 10 masks, peak pressure, pressure-time integral, maximum force and force-time integral were calculated. Wilcoxon and U-Mann-Witney tests were used to analyze parameters at a significance level of p ≤ 0.05.
In comparison of kata and kumite teams it was found that, kata plantar pressure parameters in Metatarsal-2 (p=0.05) and Metatarsals-3, 4, 5 (p=0.04) were significantly less than those in kumite. Also, in comparison of dominant and non-dominant leg, plantar pressure parameters of dominant leg were less in Metatarsal-2 (p=0.04) and more in Bigtoe (p=0.04) and Toes-3, 4, 5 (p=0.03) than those in the non-dominant leg.
Results may be indicative different of natures of the two athletic fields in that Kumite has a higher impact on plantar pressure due to higher mechanical loads. Furthermore, the unequal use of the legs may affect plantar pressure because of leg dominance. Thus, further and more comprehensive studies are necessary to prevent exercise-induced adaptations in professional levels and their treatments.

The aim of the present study was to examine the hypothesis of the specificity of practice regarding training place (to determine whether learning a sport skill was specific to the training place). Participants were 30 adolescent female students (mean age 11.50±1.50 years) who performed 10 sessions of learning perceptive-motor skill of Kata in Karate. After they finished Kata sessions, retention test was performed in the training place and transfer test in a different place and Kata scores were measured. To analyze the data, independent t test was used. Results showed that the subjects achieved their peak performance in the training place while their performance deteriorated significantly in the different place. It seems that the performance of the task was related to the place of training. The findings of this study provided evidence to support the specificity of practice hypothesis.