Mahsa Gholizadeh Varaniab; Mansour Eslami; Mozhgan Memarmoghaddam; Masomeh Ghorbani marzoni
Abstract
Introduction: This study aimed to investigate the effect of dart-throwing training with the non-dominant arm on the transfer percentage of dart-throwing accuracy, variability, and movement coordination of the dominant arm.Methods: In a Quasi-experimental design, 24 eligible students were randomly assigned ...
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Introduction: This study aimed to investigate the effect of dart-throwing training with the non-dominant arm on the transfer percentage of dart-throwing accuracy, variability, and movement coordination of the dominant arm.Methods: In a Quasi-experimental design, 24 eligible students were randomly assigned to experimental and control groups. During 12 sessions, the experimental group threw darts with the non-dominant arm in five blocks of 10 trials, and the control group did not practice. The Noraxon IMU device was used to check the coordination and variability of the limb in the pre-test and post-test, and the radial error criterion was used to measure the accuracy. Variability and coordination data were analyzed using the SPM programming model in the MATLAB environment, and a two-way repeated measures ANOVA was used to analyze behavior data at a significance level of 0.05.Results: Radial error had a significant decrease of 27% (P=0.002) and the movement variability of the dominant arm showed a significant reduction in the range of 20 to 50% of movement after training (P<0.05); However, there was no significant difference in movement coordination in the experimental group after the training sessions (P>0.05). As a result, the transfer percentage of dart-throwing accuracy increased in the experimental group.Conclusion: This research showed the transition from the non-dominant to the dominant limb. The accuracy of throwing darts in the dominant arm increased, which was accompanied by a decrease in the movement variability of the participant's dominant arm. Therefore, coaches and therapists are advised to prevent a decline in individuals' performance by training non-dominant limbs in case of dominant limb injury.
Massoumeh Ali Asghari Toyeh; Mozhgan Memarmoghaddam; Mitra Mohammadi
Abstract
One of the topics of interest to motor behavior researchers is to examine the different effects of attention strategies on motor behavior and brain activity.The aim of this study was to investigate the role of attention instructions on alpha and theta wave variations and the accuracy of dart throwing. ...
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One of the topics of interest to motor behavior researchers is to examine the different effects of attention strategies on motor behavior and brain activity.The aim of this study was to investigate the role of attention instructions on alpha and theta wave variations and the accuracy of dart throwing. 20 male students novice in dart (age range 19-22 years old) were voluntarily selected. This study was application. Firstly, the participants performed 10 attempts of dart throwing in the baseline (no attention instructions). Then, as a counterbalance, 20 practice attempts were performed in both the external and internal attention strategies. In all attempts, the alpha and theta brain waves of the subjects were recorded using biofeedback device and the radial error formula was used to measure accuracy. The data were analyzed by in-group variance analysis with repeated measures and Bonferroni post hoc test at a significance level of 0.05. The results showed that the external attention strategy increased the accuracy of the dart throwing (P=0.0001), increased alpha wavelength (P=0.01) and reduced theta wave (P=0.01) in comparison with the internal attention strategy. These findings showed the need to use attention instructions particularly external attention in targeting skill task at a beginner level; therefore, it is suggested that coaches should use external attention strategy to improve the accuracy and intelligence of the brain in beginners.
Mozhgan Memarmoghaddam; Hamidreza Taheri Torbati; Ali Kashi
Abstract
The aim of this study was to examine the effect of a course of physical exercise on cognitive function and Brain-derived neurotrophic factor in children with Attention Deficit Hyperactivity Disorder (ADHD). This research was performed semi-experimental. Participants included 25 male students aged 7 to ...
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The aim of this study was to examine the effect of a course of physical exercise on cognitive function and Brain-derived neurotrophic factor in children with Attention Deficit Hyperactivity Disorder (ADHD). This research was performed semi-experimental. Participants included 25 male students aged 7 to 10 years old referred to Ibn Sina Hospital in Mashhad, and randomly divided into two groups (control and experimental). The experimental group participated in an exercise program for 24 sessions, 75 minutes per session. The control group did not receive any intervention. All the participants performed Stroop Test and Go no go Test before and after the exercise. Also, blood samples were taken from these participants to measure serum BDNF before and after exercise. The data were analyzed using ANCOVA. The results demonstrated that cognitive function of the children in experimental group regarding Stroop and Go no go tsts showed significant difference compared with the control group, also Serum BDNF levels showed a significant increase (p<0.05). These results suggest that the organized exercise program helps to improve cognitive function and treat in children with ADHD.
