Showing 30 results for Bahram
Farhad Ghadiri, Moslem Bahmani, Abbas Bahram,
Volume 15, Issue 29 (4-2025)
Abstract
Aim: One of the recent research challenges in the field of attentional focus instructions, are the study of its effects on the performance of elite athletes in continuous tasks. The aim of this study was to compare the effects of different attentional focus instructions on performance of agility in elite futsal players.
Methods Participants included 12 elite futsal players (mean age 23.91±1.56) that were selected from the first league of Division Qom via convenience sampling method. Participants were asked to perform the agility L run test under three attentional focus instructions (the internal, external and control) in three trials. Rrepeated measure Analysis of Variance and paired t test were used for analysis of data.
Result: The results showed a significant effects of the type of attentional focus instructions on test execution time. Analyses showed that performance in the external focus of attention was higher than the internal focus conditions. Also, the result demonstrated that there is no significant difference between internal focus of attention and control conditions, and also between external focus of attention and control condition.
Conclusion: The results of this study provide evidence that in skilled athletes, executing the continuous tasks improve through verbal instructions that conduct focus of attention externally.
Yaser Khanjari, Elahe Arab Ameri, Mehdi Shahbazi, Shahzad Tahmasebi, Fariba Bahrami,
Volume 15, Issue 29 (4-2025)
Abstract
Aim: Although much research has been conducted on the concept of motor learning at the performance level, this concept has not been investigated at the level of EMG patterns and the comparison of these patterns in the dominant and non-dominant hand. The aim of this study was to investigate simultaneous changes in EMG pattern during learning dart skill in dominant and non-dominant hands.
Method: The participants of the present study consisted of 10 non-athlete students with a mean age of 23 ± 2.5 years who were randomly selected from the student community of the University of Tehran and divided into two groups of dominant hand (5) and non-dominant hand (5). Repeated measures ANOVA were used to measure data at the dart throwing performance and changes in EMG activity.
Results: The results showed a significant decrease in the absolute error of dart throwing at the performance level and an increase in EMG activity at the muscle level along with a decrease in muscle co-contraction in the acquisition and retention stages in both groups. Also, there was no significant difference between EMG activity in the dominant and non-dominant hand groups after skill acquisition.
Conclusion: Generally, the results of this study showed that along with relatively constant changes in performance during dart skill learning, relatively constant changes in EMG patterns also occur, so that the concept of motor learning is also observed at the muscle level. Also, the results of this study supported the existence of the same motor program for dominant and non-dominant hand control, even in the conditions of bilateral transfer control.
Hiwa Bahramfard, Ghodratallah Bagheri, Asadullah Kordnaeij, Ali Saberi,
Volume 15, Issue 29 (4-2025)
Abstract
Introduction and Purpose: Given the rapid pace of technological changes, any business that fails to adapt to environmental changes will undoubtedly fall behind in the competition. Therefore, in order to take advantage of emerging opportunities, entrepreneurs must make decisions in the shortest possible time. This makes entrepreneurial decision-making more complex and challenging. Accordingly, the present study aimed to investigate opportunity exploitation decisions with an emphasis on the role of entrepreneurial personality in sports businesses.
Methodology: This research employed a mixed-methods approach and is classified as developmental-applied in terms of its objective. In the first step, through meta-synthesis of 32 scholarly articles, 36 indicators were identified. In the second step, using thematic analysis of interviews with academic experts, 36 indicators were extracted, of which 27 were confirmed through the Delphi method. In the third step, narrative inquiry was used to explore the lived experiences of six entrepreneurial leaders in the field of sports, leading to the identification of 34 themes.
Findings: Based on the results, after integrating the three stages, 44 indicators were classified into seven dimensions. The validity and appropriateness of these dimensions were confirmed using the t-test and the four criteria of coherence, comprehensibility, generalizability, and control.
Conclusion: The findings suggest that entrepreneurial personality significantly contributes to improving decision-making regarding opportunity exploitation in sports and reducing environmental risk. This is achieved through the development of seven key roles: self-efficacy, autonomy, risk-taking, personal traits, creativity, perseverance, entrepreneurial networking, and entrepreneurial skills and experience.
Saeed Arsham, Mohammad Garavand, Abbas Bahram,
Volume 100, Issue 100 (10-2020)
Abstract
The aim of this study was to determine the effectiveness of the type of goal setting and self-recording on acquisition and self-regulation learning of basketball free throw. Seventy middle school student boys were selected for available and randomly allocated to 6 experimental groups and one control group. A factor ANOVA with a significant level of 5% (p < 0.05) was conducted to analyze the self-efficacy and performance data in acquisition and retention tests. The results showed that the goal-setting with the self-recording group has a higher self-efficacy and performance than the goal-setting without self-recording and the control groups in acquisition and retention test of basketball free throw. This research showed that a variety of goals can begin to combine and cause positive results in performance and learning. Self-recording is important for performance and self-efficacy and can be easily taught and used during physical education sessions.
Hamed Sabzevari, Farhad Ghadiri, Abbas Bahram, Rasol Yaali,
Volume 100, Issue 100 (10-2020)
Abstract
Abstract
The purpose of this study was to examine the relationship between motor competence, cardiovascular fitness test and physical activity of adolescents with the role of mediation of perceived competence. The research sample consisted of 386 adolescent boys. Perceived competence was measured using Physical Ability scale of the short form of the Marshall Self-Descriptive Questionnaire (2010). From the pedometer And physical activity questionnaire for older children was used to measure physical activity, and using Bruininks-Oseretsky Test test for measuring motor competence and a 1600-meter test for cardiovascular fitness test. The results showed a significant correlation between motor competence, perceived competence, cardiovascular fitness test and physical activity. Perceived competence mediates association between motor competence and physical activity, fitness and cardiovascular fitness test. Finally, the results of the model showed that perceived competence had the most impact on the participation of adolescent physical activity. Also, motor competence has a greater effect on cardiovascular fitness test than perceived competence. According to the results of the research, educational programs should be designed and designed according to the importance of motor competence and perceived competence to improve participation of physical activity and physical fitness of adolescents.
Abbas Bahram, Sared Arsham, Moslem Bahmani,
Volume 100, Issue 100 (10-2020)
Abstract
Few studies have investigated dimensions of attention out of laboratory settings. The aim of this study was to investigate the interaction between internal/external and associative and dissociative attention and its role in expert judo players’ technical performance during competition. mixed method approach with parallel-design was used. In the qualitative section of the study, expert judo players’ attentional strategy was explored using self-confrontation interviews. In the quantitative part of the study, differences between reported foci in successful versus unsuccessful trials was tested. Analysis of interview transcripts revealed that expert judo players had more focus on external-associative dimension in both preparation and execution phases. In addition, results of chi-square test indicated a significant difference between judo players’ focus of attention in successful versus unsuccessful trials (p < 0.05) with more focus on external-associative attention in successful trials. In conclusion, while this study does not support use or advantages of dissociative attention in skilled performers, provided more support for constrained-action hypothesis as indicated more use and advantages of adopting an external-associative focus for expert level judo players.
Mr Mohsen Mohammadi, Dr Abbas Bahram, Dr Saeeid Arsham, ,
Volume 100, Issue 100 (10-2020)
Abstract
The purpose of this research was to investigate the structure of the ball behavior in the futsal teams during the offensive phase. The type of research was observational and the data extracted from the 12 games in the training matches of the players of the futsal resistance team present at the Premier League matches of 97-98 were recorded and analyzed. Using the SOCNET software, the values of the cluster coefficient were calculated and using the MATLAB software, Shannon entropy values for each team were calculated. The results showed that by increasing the number of training sessions, the values of the cluster and entropy coefficient of Shannon increased in both teams and there is a moderate correlation between the values of the cluster coefficient and Shannon entropy was observed with the number of training sessions. In general, and according to the results of this study, the functional variability of ball behavior patterns increased with training and team experience, and the level of complexity and unpredictability of the team network increased. According to the sensitivity of the behavioral patterns of the ball to the effects of training, sport analyzers can use the information from this level of analysis to explain the team's synergistic behaviors in futsal teams.
Abbas Bahram, Saeed Arsham, Moslem Bahmani,
Volume 100, Issue 100 (10-2020)
Abstract
The aim of this study was to investigate the role of attention in skilled performance in real conditions, using a mixed-method study. Fourteen expert judo player participated in the study. The stimulated recall was used in the qualitative phase of the study to explore athletes’ attention in real competitive conditions. In the quantitative portion of the study, number and percentages of foci in preparation phase, execution phase, and total (preparation +execution) were associated with performance movement time. Our results indicated that while attention during execution phase was not associated with performance time, attention in the preparation phase was associated with better performance time. specifically, less attentional cues with higher percentages of focus on the opponent resulted in more quick performances. In conclusion, our findings demonstrate that focus on opponent during preparation phase is associated with superior technique execution during real competitions.
Behzad Mohammadi Orangi, Dr Rasoul Yaali, Professor Abbas Bahram, Professor Mohammad Taghi Aghdasi,
Volume 100, Issue 100 (10-2020)
Abstract
The purpose of present study was to investigate the role of motor learning strategies (linear, non-linear, and differential) in the experience of flow and clutch in beginner footballers. Participants (66, M age= 27.49 and SD =2.68) participated in this study voluntarily and based on inclusion and exclusion criteria. Participants practiced in three groups: linear, nonlinear, and differential, for three months, two sessions each week and each session one and a half hours. The study method was quantitative and qualitative. In the quantitative part, flow and clutch questionnaire was used and in the qualitative part a semi-structured interview was used. The results of Tukey showed nonlinear pedagogy was effective in flow experience and linear method in clutch experience (p<0.05). In the differential learning, flow was experienced more than linear method (p<0.05) and less than non-linear method (p>0.05). In the qualitative part, four factors of purpose, pleasure, effort and exploration are identified that support the results of the quantitative part. Based on the results of this study, nonlinear and differential methods are effective in the flow experience and linear method are effective in the clutch experience.
Ph.d Nasrin Zandi, Dr Rasoul Yaali, Dr Abbas Bahram, Dr Shahab Parvinpoor,
Volume 100, Issue 100 (10-2020)
Abstract
The aim of this study was to compare the effect of training type (full-error and error-less) and skill level on the development of mental representation of putt golf skill. For this purpose, 44 undergraduate physical education students (22 women, 22 men; mean age 22.34 and standard deviation 4.37) were randomly divided into two groups: error-less (near-to-far) and full-error (far-to-near). The two groups practiced in the one-day acquisition phase of 3 blocks of 10 attempts for throwing distances (25, 50, 75, 100, 125, 150 and 200 cm). The error-less group started training from the closest distance to the goal and reached the farthest distance, respectively, but the full-error group started training from the farthest distance and finally reached the closest distance. At the end, they were tested immediately. One day after the acquisition phase, delayed retention tests, single task transfer (from a distance of 225 cm) and dual task transfer (from a distance of 200 cm simultaneously with audio playback) were performed. To compare the effect of error-less and full-error training on the acquisition, retention and transfer of putt golf skills, data analysis of the acquisition stage was analyzed by repeated measures analysis of variance (2×8). SDA-M test was used to measure the structure of mental representations formed in the two groups before and after the acquisition period, and hierarchical cluster analysis
0.05) was used to analyze the mental representations. Our Findings showed significant functional changes in the post-exercise mental representation structure, suggesting that motor skills are associated with functional adaptation of action-related knowledge in long-term memory.
