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.
Mahboubeh Ghayour; Mahmood Sheikh; Rasool Hemayattalab; Amirhossein Mmemari
Abstract
The aim of this study was to investigate the effect of selected spark exercises on balance and coordination in autistic children. This study was semi-experimental. 12 autistic children (mean age 5-12 years) participated in this study. The subjects performed the intervention for 3 months based ...
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The aim of this study was to investigate the effect of selected spark exercises on balance and coordination in autistic children. This study was semi-experimental. 12 autistic children (mean age 5-12 years) participated in this study. The subjects performed the intervention for 3 months based on selected spark exercises. The participants were evaluated in 3 stages (baseline, pretest and posttest) by Bruininks-Oseretsky test in terms of motor skills. Friedman test was used to analyze repeated measures of nonparametric data. The results showed that selected spark exercises significantly improved dynamic balance (P<0.001) and bilateral coordination (P<0.001). It can be generally stated that these selected spark exercises have a positive effect on the improvement of motor deficiencies in autistic children.
Saeed Arsham; Farzam Farahman; Fazlolah Bagheradeh; Elahe Arab ameri; Anoushirvan Kazemnejad
Volume 1, Issue 2 , October 2009, , Pages 103-126
Abstract
The aim of the present study was to introduce the methods to extract and to interpret cinematic data in order to explain movement pattern changes via joint coupling and freezing/freeing phenomena in a healthy right-dominant college male (age:26, height: 172 cm, weight: 80 kg) who practiced balance maintenance ...
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The aim of the present study was to introduce the methods to extract and to interpret cinematic data in order to explain movement pattern changes via joint coupling and freezing/freeing phenomena in a healthy right-dominant college male (age:26, height: 172 cm, weight: 80 kg) who practiced balance maintenance on a stabilometer. Data were gathered using a three-dimensional registration system which consisted of three cameras and a computer program (Sharif Motion Analyzer-SMA) in MATLAB software and measured the position of 19 passive markers located on subject's limbs and stabilometer. Before each trial, the system was calibrated by a metal frame of known dimensions to transform the two-dimensional camera detector values to real three-dimensional coordinates. Then, the following variables were calculated for the first, fifth and ninth trail from a 3(session) × 3(trail) course of practice: 1) stabilometer variability as a performance index; 2) absolute and relative variability of joint angles to evaluate possible freezing-freeing process; 3) cross-correlations between the angular time series in order to evaluate the presence of joint coupling. Finally, the interpretation method to extract variables was presented and some limits of such studies regarding the variability in degrees of freedom were provided.