Sepehr Ferdousi; Mahdi Shahbazi; Elahe Arabameri
Abstract
Introduction: The purpose of present study was to test the effect of contextual interference and self-regulation on the transfer of volleyball services (underhand and windmill service).Methods: Participants were 39 male students (20-25 years old) were randomly assigned to one of three groups (blocked, ...
Read More
Introduction: The purpose of present study was to test the effect of contextual interference and self-regulation on the transfer of volleyball services (underhand and windmill service).Methods: Participants were 39 male students (20-25 years old) were randomly assigned to one of three groups (blocked, random and self-regulation) and performed total of 40 trials of volleyball service each session (6 sessions). The blocked group practiced 40 trials of one service each session but the random group randomly practiced both services. In self-regulated group, the type of services in each session was determined by subjects. The transfer test was conducted one week after practice period in 5 trials. In order to analyze the data, the one-way analysis of variance and the Tukey’s post hoc tests were used.Results: The comparison between the pre-test and transfer test showed that the difference between blocked and random groups was not statically significant. The self-regulation group had higher transfer scores compared to blocked and random groups.Conclusion: The results of present work support the contexuual interference affect but it’s not significant. Self-regulated practices involve the subjects in learning processes. Also, with his method, they participate more activity in determining the characteristics of the exercise. These factors lead to the improvement of learning and better performance.
Benyamin Ghelichpoor; Mehdi Shahbazi; Fazlolah Bagherzadeh
Abstract
The aim of this study was to investigate national jump roping plan on static and dynamic balance of students. In this study, pretest and posttest were used with two experimental and control groups for male students of fourth grade of elementary school in 2011-2012 in Baharestan city (a region in Robat ...
Read More
The aim of this study was to investigate national jump roping plan on static and dynamic balance of students. In this study, pretest and posttest were used with two experimental and control groups for male students of fourth grade of elementary school in 2011-2012 in Baharestan city (a region in Robat Karim, Tehran). For this purpose, 60 students were selected from students of fourth grade of elementary schools in Baharestan city using multistage sampling method and were equally divided into two groups. Experimental group implemented the selected jump roping program 3 sessions a week (each session 50 min.) for 10 weeks. K–S test was used to check data normality. Independent and dependent t tests were used to analyze the data (P˂0.05). The results indicated a significant improvement in the experimental group for both static (P=0.019) and dynamic (P=0.005) balance tests. Also, the mean score of dynamic balance posttest was significantly more in the experimental group than control group (P=0.041) but such difference was not observed in the result of static balance test between the two groups (P=0.225). Based on these results, jump roping plan improved the balance of students. So this study considered the jump roping plan to be useful at schools.
