Mohammadali Esmaeilzadeh; Mehdi Shahbazi; Ali Akbar Jaberimoghaddam; Shahzad Tahmasebi; Elham Shirzad
Abstract
Behavioral studies in team sports are typically constrained by dynamic factors, such as positioning of defenders for interception. Handball player have to coordinate their steps when running to throw a ball on goal from a different positions. In this study were analyzed the movement patterns during locomotors ...
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Behavioral studies in team sports are typically constrained by dynamic factors, such as positioning of defenders for interception. Handball player have to coordinate their steps when running to throw a ball on goal from a different positions. In this study were analyzed the movement patterns during locomotors pointing, throwing velocity and accuracy of 12 succesful elite handball players under defensive constraints (defender- absent, defender-far, defender-near, or defender pairing). It was captured data from the locomotors patterns of the attacking participant by speed camera with 120Hz, throwing speed by sports radar gun and throwing accuracy by camera. ANOVA with repeated measures and Bonferroni post hoc test and Friedman test was used to analyze effects of these constraints on gait and throwing parameters. In addition to Pearson and Spearman correlation coefficient test was used to analyze speed-accuracy trade off (P<0.05). The results revealed significant differences in overall mean movement velocity, first and second step mean velocity, first and second step mean length. For the mean foot/gate area distance variability was shown pattern of ascending/descending variability in all defense conditions. Since regulation of offensive players was continuous and based on perception of current and required behaviors, results supported from perception-action coupling and prospective control models of locomotors pointing. Also it is suggested that the technical aspects of the running and throwing in handball can affect by nested tasks constraints.
Mina Emami Arandi; Ali Akbar Jaberi Moghaddam; Ahmad Farokhi
Abstract
The aim of this study was to compare the effect of self-talk (ST), feedback (KP) and their interaction (STF) on acquisition and retention of basketball chest pass. 120 adolescent girls were selected and randomly assigned to 4 groups: KP, ST, ST + KP and control. This study was semi-experimental and pretest-posttest ...
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The aim of this study was to compare the effect of self-talk (ST), feedback (KP) and their interaction (STF) on acquisition and retention of basketball chest pass. 120 adolescent girls were selected and randomly assigned to 4 groups: KP, ST, ST + KP and control. This study was semi-experimental and pretest-posttest design with a control group. Instructional self-talk and knowledge of performance feedback were used in this study. After the pretest, each group had 4 practice sessions in the acquisition phase; then, they had posttest and 72 hours later they had retention test. One-way ANOVA and Tukey post hoc test were used to analyze data. Results indicated those subjects who used ST achieved better acquisition and retention scores than the other groups (P<0.05). ST was more effective than KP in the acquisition of chest pass skill. ST and KP can lead to a better and faster development of learning in the early phases
Nastaran Naderirad; Ali Akbar Jaberi Moghadam; Shahzad Tahmasebi Boroujeni
Abstract
Postural control is one of the important abilities in daily life and sport activities of human beings and the importance of focus of attention is always discussed in this issue. In this regard, the aim of the present study was to investigate the effect of the instructions of focus of attention ...
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Postural control is one of the important abilities in daily life and sport activities of human beings and the importance of focus of attention is always discussed in this issue. In this regard, the aim of the present study was to investigate the effect of the instructions of focus of attention of supra-postural task on performance and learning of postural control in girls aged between 9 and 12. 45 female students in an elementary school in Malayer city participated in this study and were randomly divided into 3 groups: external attention, internal attention and control by drawing of lots. The participants were asked to maintain their postural control by instructions on supra-postural task. Instructions included focus of attention on the bar they held horizontally (external focus), on their hands (internal focus) and no instructions (control). The results of analysis of variance with repeated measures showed that learning process in external focus group was significant compared with the internal focus (P=0.049) and control (P=0.005) groups. However, no significant differences were found in learning between internal focus and control groups (P=0.345). It can be concluded that external attention instruction on supra-postural task led to better postural control than internal attention instruction.
Ali Akbar Jaberi Moghadam
Abstract
This study aimed to consider the dimensions and parameters of handling individual abilities in religious system and contemporary theories based on Quran and Hadith related to body training and physical skills in Islam. As there are a large amount of evidence related to the fit body and relaxed mind, ...
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This study aimed to consider the dimensions and parameters of handling individual abilities in religious system and contemporary theories based on Quran and Hadith related to body training and physical skills in Islam. As there are a large amount of evidence related to the fit body and relaxed mind, many case studies can be observed accordingly. Besides a brief review of the history of Islam, comparative approaches and studies as well as the viewpoints of Islam and other contemporary religious scholars were examined in this study. Among the issues discussed in this study, some items gained more attention: mental and physical health, dimensions of handling individual and practical abilities such as resistance, high morality, agility (activity and skill), stress fighting, prospect, analyzing the situation, and identifying the competitors. In addition, to explain the evidence of religious system, historical and real facts in Quran and Hadith were presented.
Alireza Farrar; Mostafa Khani; Aliakbar Jaberi Moghaddam; Ahmad Farokhi; Kimiya Sadri
Abstract
It is necessary to understand the effective factors in participation in physical activity in order to increase this activity in school students. The aim of the present study was to compare the level of physical activity between field dependent/ independent students in guidance schools of Kharame city ...
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It is necessary to understand the effective factors in participation in physical activity in order to increase this activity in school students. The aim of the present study was to compare the level of physical activity between field dependent/ independent students in guidance schools of Kharame city of Fars province. At first 150 male students were randomly selected and after Frame and Rod test, 100 subjects were divided into two groups: field dependent group (mean age of 12.82±0.96 years, height 155.9±6.65 cm, weight 47.5±12.27 Kg) and field independent group (mean age of 13.32±0.89 years, height 158.1±8.61 cm, weight 51±15.74 Kg). Frame and Rod test was used to measure dependence and independence and Self-assessed Physical Activity Checklist was used to evaluate physical activity. Kolmogorov-Smirnov test was used to check the normality of the data. Independent t test was used for statistical analysis in SPSS Version 17 (?=0.05). There was a significant difference in duration of physical activity between students with field dependent/independent cognitive styles (p=0.000). There was a significant difference in duration of moderate to burst physical activity between students with field dependent/independent cognitive styles (p=0.018). There was a significant difference in MET scores between students with field dependent/independent cognitive styles (p=0.000). There was a significant difference in MET of moderate to burst physical activity between students with field dependent/independent cognitive styles (p=0.012). The results of this study showed that students with field independent cognitive styles had more physical activity and energy expenditure than field independent students. It was concluded that the field dependent students may have more motor impairments and this claim needs more studies to be approved. Moreover, since cognitive style, as one of the variables which are the result of the interaction between the environment and individual and can be changed and developed, can be interfered, it is suggested that cognitive styles of the students change and encourage them in physical activity and healthier life through educational strategies.
