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Volleyball is gradually becoming the sport that many students are interested in and choose to join in daily practice. However, in the process of learning and work out, most students make basic errors when performing technical tasks. This article aims to identify, select and build some supplementary exercises in order to correct the common errors of students in the process of implementing the cushion technique of low ball with both hands.
AGU International Journal of Sciences – 2019, Vol (1), 68 – 73 STUDYING AND SELECTING SOME SUPPLEMENTERY EXERCISES TO IMPROVE TECHNIQUE OF CUSHIONING THE BALL WITH TWO HANDS FOR NON-MAJOR STUDENTS OF TIEN GIANG UNIVERSITY Huynh Phong Ba1, Vo Tran Thai1 Tien Giang University Information: Received: 20/10/2018 Accepted: 11/02/2019 Published: 11/2019 Keywords: Sport; volleyball; student; exercise ABSTRACT Volleyball is gradually becoming the sport that many students are interested in and choose to join in daily practice However, in the process of learning and work out, most students make basic errors when performing technical tasks This article aims to identify, select and build some supplementary exercises in order to correct the common errors of students in the process of implementing the cushion technique of low ball with both hands INTRODUCTION SUBJECTS AND METHODS OF THE STUDY Like other sports such as Football, Athletics, Basketball, Badminton, or King Chess, volleyball is the sport that most people like and participate in training Participants in Volleyball are very different from teenagers, middle aged people or the elderly 2.1 Research subjects The research subject is some additional exercises to improve the cushion technique with two hands for non-major students of Tien Giang University Activities in volleyball is a combination of basic movement techniques such as passing, cushioning, smashing, kicking and blocking in which the technique of low cushioning with two hands is one of the basic and important techniques in volleyball 2.2 Research object The research object was 90 students of 02 elective sports classes Volleyball was taught in the first semester of the school year 20182019 at Tien Giang University, in details: - Due to the practice of teaching elective sports for non-major students at Tien Giang University, we realize that most students still make many mistakes while performing this movement technique Therefore, we study the topic: "Studying and selecting some supplementary exercises to improve technique of cushioning the ball with two hands for nonmajor students of Tien Giang University" - Case-Control group: 45 students of class 1244104 (female students are 20) Experimental group: 45 students of class 1244108 (female students are 20) 2.3 Research Methods To achieve the purpose of the research, we have used the following research methods: Methods of analyzing and synthesizing documents; 68 AGU International Journal of Sciences – 2019, Vol (1), 68 – 73 Interview method; Pedagogical observation method; Pedagogical experiment method and statistical math method class, the specific test content includes a number of tests as follows: 3.1 Situation to identify the mistakes when performing the technique of using lowhanded cushion with two basic hands of Tien Giang University students Test of moving and catching the ball into the wall Test of image of hand pick and catching ball Test of serving the ball Test of typing support Test to block the ball To assess the situation in order to identify some mistakes when performing the basic technique of low cushioning with two hands for students of Tien Giang University, the subject conducted a practical technical inspection of the whole By the method of pedagogical observation, the thesis identifies the errors of students when performing the technique of using low cushion with two basic hands, after statistics, some common errors of students are presented in table RESEARCH DISCUSSION RESULTS AND Table Pedagogical observation results when using the cushioning technique (n=90) Serial Number of students making mistakes ERROR ACTS n Error Error when moving for the ball pickup (n=90) % 88 97.78 Error Error in preparing position 75 83.33 Error Two-handed error of misalignment 80 88.89 Error Error of coordination between parts of the body 85 94.44 Error Error contact with wrist 75 83.33 Error The body position falls a lot forward or backward 24 26.67 Error Hands relax, the two forearms not form the plane, especially when cushioning the ball on the left (right) affects ball flight accuracy 15 16.67 Error After cushioning the ball, the hands bend at the elbows 30 33.33 Through the above statistics table, after observing students performing low-handed ball technique, the topic found that many students made errors (errors 1, 2, 3, and 5) with the above rate of over 80% Based on that, the topic interviews the lecturers who have much experience in teaching the Volleyball section at Tien Giang University, the interview content is to determine the necessity of the additional exercises support to overcome common errors of students when performing low-cushion technique with two hands Interview results are presented in Table 69 AGU International Journal of Sciences – 2019, Vol (1), 68 – 73 Table Interviews lecturers on the choice of supplemental exercises to overcome some common errors of students when performing the ball cushion technique DEGREE OF EVALUATION Serial Error Error Error 2, 3 Error 4 Error SUPPLEMENTERY EXERCISES TO OVERCOME ERRORS Exercise 1: Move directions to catch the ball (front, back, left, right) Exercise 2: Cushioning the ball to the wall or by tossing the ball Exercise 3: Self ball to cushion Exercise 4: Blocking the ball (n=13) Level Level n n % % Level n % 0 0 13 100 7.69 7.69 11 84.62 0 7.69 12 92.31 0 7.69 12 92.31 * Level 1: Not required; Level 2: Necessary; Level 3: Very necessary Through the interview results on choosing a number of exercises to overcome the common errors of students when performing the technique of cushioning low ball with two hands, the complementary exercises have been developed and selected equally The majority of the respondents choose with over 80% of the respondents agree At the same time, the comments said that in order to improve the quality of two-hand cushioning technique for two-hand under-balls by non-major students at Tien Giang University, it is necessary to apply all exercises simultaneously in teaching practices at the school Based on that, the topic has selected and built 04 supplementary exercises to overcome some common errors of students when performing low-cushion technique with two basic hands, specific content is presented in section 3.2 of the thesis 3.2 3.2.1 Supplementary exercises to fix error of students Exercise 1: Move directions to catch the ball Purpose: To help students actively identify the dropping point of the ball Requirements: Students actively identify the dropping point of the ball Method: Divide the class into 02 groups, stand on 02 sides of the net, each student moves directions to catch the ball, 01 server throws the ball in 04 directions forcing students to observe and proactively move for catching the ball 3.2.2 Supplementary exercises to overcome error and of the students Exercise 2: Cushioning the ball to the wall or by tossing the ball Purpose: To help students consolidate and perfect the ball cushion technique Selecting some additional exercises to improve the technique of low-ball cushion with two hands for students of Tien Giang University How to it: Divide the class into small groups of 3-5 students, standing opposite the wall (or 02 students standing opposite each 70 AGU International Journal of Sciences – 2019, Vol (1), 68 – 73 other) with about m, taking it continuously for 02 minutes How to do: Divide the class into small groups standing opposite each other, with about 2m, one performs the knocking motion, another performs the technique of knocking the ball, perform continuously for 02 minutes, repeat from -5 times 3.2.3 Supplementary exercises to overcome error of students Exercise 3: Self ball to cushion Purpose: To help students a sense of space with the ball 3.3 Evaluate the effectiveness of supplementary exercises to overcome some errors when performing lowhanded cushion technique with two hands of Tien Giang University students Requirements: Perform continuously, toss the ball at a moderate height, follow the learned technique Implementation time: Performing minutes, repeating 3-5 times 3.2.4 in 02 3.3.1 Assessing the results of the two-hand buffer technique test by two hands of the control and experimental groups Supplementary exercises to overcome error of students To be able to objectively assess the initial level of the target groups of researchers before going into the experiment, the subject conducted a cushion of low ball with two hands for all students of the two groups the results are presented in Tables and Exercise 4: Blocking the ball Purpose: to increase the difficulty for the cushion, to enhance the feeling of contact and improve the technique at a higher level Table Chi-Squared Test results of groups of female students before the experiment Value df Asymp Sig (2-sided) Pearson Chi-Square 0.582a 0.748 Likelihood Ratio 0.589 0.745 Linear-by-Linear Association 0.000 1.000 N of Valid Cases 40 a cells (33.3%) have expected count less than The minimum expected count is 1.50 Table Chi –Squared Test results of male groups of students before experiments Value df Asymp Sig (2-sided) Pearson Chi-Square 0.525a 0.769 Likelihood Ratio 0.532 0.767 Linear-by-Linear Association 0.000 1.000 N of Valid Cases 50 a cells (33.3%) have expected count less than The minimum expected count is 1.50 71 AGU International Journal of Sciences – 2019, Vol (1), 68 – 73 Through the results of Chi square test of 02 groups of male and female students before experiment, respectively 0.525 and 0.582