Amir hossein Mehrsafar; Sajjad Mohammad Yari; Abbas Shakibirad
Abstract
Introduction: The mental appraisal and athlete's ability to deal with stressful factors affect the development of negative emotional states and anxiety. Considering the impact of stress and related psychological responses on performance, interventions that reduce stress and may thus increase athletic ...
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Introduction: The mental appraisal and athlete's ability to deal with stressful factors affect the development of negative emotional states and anxiety. Considering the impact of stress and related psychological responses on performance, interventions that reduce stress and may thus increase athletic performance need to be investigated.This study aimed to determine the effect of transcranial Direct Current Stimulation (tDCS) on psychological choking, fear of failure, and shooting performance underpressure in students of Imam Ali Officers’ University.Methods: This quasi-experimental study was conducted with a pre-test and post-test design that includes a control and an experimental group. Forty students of Imam Ali Officers' University participated in this study. In the pre-test and post-test, the fearof failure and psychological choking questionnaires and also shooting performance tests were used. The tDCS was applied for 20 minutes with an intensity of 2 mA overthe dorsolateral prefrontal cortex (DLPFC) region for 10 sessions. Data were analyzed using univariate repeated measures ANOVA test.Results: The results showed that tDCS over DLPFC could reduce psychological choking under pressure but could not change the fear of failure. The results also showed that tDCS can increase shooting performance under pressure.Conclusion: In general, it can be concluded that tDCS probably increase performance-related indicators in high-pressure military environments. However, more studies are needed to find the underlying mechanisms.
Farnaz Torabi; Zahra Mortazaeedarsara
Abstract
AbstractConcentration is an important rool in shooting, Some consider the ability to concentrate to be a natural and inherent talent of athletes, while these abilities are not innate and are skills that athletes can acquire through practice and learning.The use of direct brain electrical stimulation ...
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AbstractConcentration is an important rool in shooting, Some consider the ability to concentrate to be a natural and inherent talent of athletes, while these abilities are not innate and are skills that athletes can acquire through practice and learning.The use of direct brain electrical stimulation is one of the ways to increase the concentration. This study focused on effect of Transcranial direct current stimulation (tDCS) on the concentration and record of 16 to 26 year old pistol shooters in Isfahan was investigated, 30 subjects (consisted of women and gentlemen were present. 15 of them were in experimental group and 15 subjects were selected for control group. Before the beginning of the study, subjects of both groups were subjected to a pretest including a stroop test and a complete shot form 60 arrows with a scatt machine. Then the experimental group went under the influence of tDCS from the T3 and CZ regions for 20 minutes with voltage of 1 mA per day and it continued for 10 sessions. All subjects were subjected to post-test, which was the same as the pre-test after the end of work and 7 days later. Data were analyzed by SPSS . The results showed that Transcranial direct current stimulation had a significant effect on the concentration and the record of the pistol shooters. The results of both descriptive statistics and inferential statistics (P <0.05) indicated that tDCS had a significant effect on concentration and record of pistol shooters and it improved by using tDCS.
Golchin Shokreh; Fatemeh Hosseini
Abstract
The aim of this study was to evaluate the effectiveness of transcranial direct current stimulation (tDCS) on working memory in children with developmental coordination disorder (DCD). The research method was quasi-experimental with pretest and posttest and retention with experimental and control groups. ...
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The aim of this study was to evaluate the effectiveness of transcranial direct current stimulation (tDCS) on working memory in children with developmental coordination disorder (DCD). The research method was quasi-experimental with pretest and posttest and retention with experimental and control groups. The research population consisted of children (age: 7-11 years old) in Urmia city in 2018. 16 children with DCD were selected as the sample with convenience sampling method and based on inclusion and exclusion criteria, and then were randomly divided into two groups: experimental (n=8) and control (n=8). The experimental group received 10 sessions (each session 10 minutes) of tDCS on f4 and f3 brain zones with 0.75 mA circuitry. The control group received 10 sessions of sham circuitry for 20 seconds, then the circuity was cut off, but they were not informed of this sham circuity. The data of working memory were collected using N-BACK test. The analysis of variance with repeated measurements was used to test the research hypothesis (P=0.05). The results showed that transcranial direct current stimulation (tDCS) had a significant effect on the enhancement of working memory and the effect would continue to the retention phase (P=0.05). This approach can be used to improve working memory in children with DCD.
