نشریه رشد و یادگیری حرکتی - ورزشی
پیاپی 26 (زمستان 1395)

The aim of this study was to investigate the effect of different sport fields, different training levels and their interactive effects on indicators of growth and sexual maturation of adolescent female athletes. The population consisted of all adolescent female athletes (aged 17-9) in gymnastics, volleyball and table tennis in Arak city and the sample included 49 gymnasts, 82 volleyball players and 38 table tennis players who were selected by multistage cluster sampling method. The data were collected by a demographic questionnaire, the physical activity questionnaire for adolescent (PAQ-A), the Tanner Table and bioelectric resistance method. To analyze the data, covariance analysis at (P≤0.05) was used. The findings showed that different sport fields had significant effects on indicators of height, leg length and fat (P˂0.05). Different training levels had significant effects on indicators of fat (P≤0.05). The interactive effect of different sport fields and different training levels had no significant effects on indicators of growth and sexual maturation (P≥0.05). It was concluded that athletes enter these three sport fields when their growth characteristics are proportional to the needs of that field. Also, maximum 10 hours of exercise training per week have no adverse effects on indicators of growth and sexual maturation of athletes.

Motivation is one of those factors affecting the success and quality of athletic performance. However, limited research has been conducted on the motivational traits of Iranian athletes. This study aimed at describing the motivational traits of skilled and novice athletes of team and individual sports in some selected sports fields. Players of national teams of the individual sports of karate, taekwondo, fencing, badminton, sailing and team sports of basketball, volleyball, Dragon boat, handball and futsal were purposively selected as the population of skilled athletes and 60 athletes were randomly selected from all above selected sports fields from some selected provinces as the sample of novice athletes. Data from the Sport Attitudes Inventory (SAI) were classified according to team and individual sports and players were classified according to novice and skilled levels and data were analyzed using descriptive statistics. Inferential statistical results of ANOVA showed that competitive motivation was significantly higher in skilled and novice athletes of individual sports than team sports and it was higher in skilled athletes than novice athletes (P

Decision making plays an important role in sport activities and is directly associated with sporting success or failure. On the other hand, one of the key issues in psychology of sports and behavioral sciences is sport orientation. The aim of this study was to investigate the relationship of action and state orientation with decision making behavior of expert female football players. 27 players who attended competitions for at least 8 years participated in the present study. Action Control Scale (ACS-90) was used to specify action or state orientation of players. Then, to evaluate the performance of decision making of players, the images of real football situations were used. The players were required to respond correctly to one of the existing options (shooting, dribbling, passing). K-S test was applied to examine normal data distribution and multiple regression and Pearson correlation coefficient were used to analyze data at significance level of 0.05. Results showed a significance correlation between action orientation and accuracy and decision making behavior of action players (P0.05). Moreover, results indicated no significant relationships between state orientation and variables (accuracy, speed and decision making behavior) of state players (P>0.05). Finally, it can be inferred that action orientation in expert players has a correlation with accuracy in decision making and risk taking choices and it can facilitate reaching their goals.

This study aimed at examining the effect of local games on motor development and aggressive behavior in preschool children. In a semi-experimental study, 40 children (6 years old) were selected randomly from preschools in Ahwaz city. Pretest was conducted using Ulrich Gross Motor Skills test and Aggression Scale. Based on their pretest scores, subjects were divided into two equal groups: local games and preschool common activities. Local games group participated in local games program for 8 weeks, 3 sessions per week while the other group had their preschool common activities. Then, all subjects participated in a posttest. After ensuring normal data distribution using Kolmogorov-Smirnov test, paired and independent t tests were used for intergroup and intra-group comparisons. Paired t test analysis showed the significant effect of both programs on motor development and reduction in aggression in preschool children. But intergroup comparison showed the advantage of local games over the preschool common activities (P=0.001). It is suggested that preschools should use local games to enhance motor development and to reduce aggressive behaviors in children.

The aim of this study was to determine the validity and reliability of the Basic Psychological Needs in Exercise Scale (BPNES). The method was descriptive-survey. The Statistical population consisted of male and female athletes aged over 16 years who attended structured exercise programs. The sample consisted of 256 male and female athletes (M=23.03¡ SD=4.04) who were selected through cluster random sampling method. The 12-item Basic Psychological Needs in Exercise Scale was initially translated (by translation - back translation method) and then its face and content validity were confirmed. After a pilot study and necessary modifications¡ confirmatoryfactoranalysis (CFA) was used to examine construct validity. Cronbach''s alpha coefficient was used for internal consistency of the scale and temporal reliability of the items. Intra-class correlation coefficient (ICC) was examined by test-retest method with 2-4 weeks of interval for the scale and subscales. The results showed that the second model of BPNES had acceptable fit indexes (CFI=0.98¡ RMSEA=0.07)¡ internal consistency (alpha coefficient: 0.87 for relatedness¡ 0.80 for competence¡ 0.82 for autonomy¡ and 0.88 for the whole questionnaire) and temporal reliability (0.88 for relatedness¡ 0.83 for competence¡ 0.83 for autonomy¡ and 0.90 for the whole questionnaire). So¡ this scale can be used for research population in Iran.

Visual training includes special practices that improve eye performance of control and coordination. This training is used to enhance visual function in sports performances. The aim of this study was to examine the effect of a visual training course on volleyball serve reception skill. 40 high school students (17-19 years old) were selected randomly and divided into four groups: visual training, skill training, mixed (visual & skill training) and control. The visual training group participated in visual training for 8 sessions. The skill training group received 8 sessions of serve reception skill training. The mixed group participated in both visual and skill training programs during their 8 training sessions. During this period, control group did not participate in any related activities and had their daily routines. Before and after these training sessions, pretest and posttest were administered by “volleyball serve reception test in five regions”. The results of paired sample t test (to compare pretest and posttest scores) showed that mixed and skill training groups significantly improved their serve reception skill (P0.05). Also, the results of one-way ANOVA test showed that four groups had significant differences (P=0.001) and Tukey post hoc test showed that mixed training group had a better performance than other groups. Skill training group had a better performance than control and visual training groups (P

Perceptual-motor skills play a vital role in many tasks of daily life and sports skills. The measurement of coincidence anticipation timing ability is a method to evaluate perceptual and perceptual-motor skills. Thus, the main aim of the present study was to investigate the role of different organism, task and environment constraints in coincidence anticipation timing accuracy. For this purpose, 30 female adolescents (17-15 years old), young (20-40 years old) and elderly (60-80 years old) participated in 4 tests of coincidence anticipation timing. The tests included a coincidence anticipation timing task with green (1), blue (2), red (3) color background and an additional environment constraint (4) and participants had to coincide with the arrival of the stimulus in the target point and press the corresponding key. For data analysis, mixed ANOVA (3*4), 4 one-way ANOVA and 3 ANOVA with repeated measures were used for each group with adjusted Bonferroni. Statistical analysis showed a significant difference in test 1, 3 and 4 (P≤0.0125). Also, all groups showed a significant reduction in performance when the background color changed from green to red and the addition of the secondary task (P≤0.017). In addition, results indicated that the elderly group had the weakest performance compared with the adolescent and young groups and the reason might be a weakness in perceptual-motor systems related to age increase. Finally, different coincidence anticipation training programs were recommended for athletes, elderly and patients with perceptual-motor system weakness.

The aim of this study was to determine the psychometric properties and to normalize Persian version of the Self Talk Questionnaire. 384 male and female athletes in three skill levels and 10 sport fields (team and individual) were selected and completed the Persian version of the Self Talk Questionnaire. At first, face validity of this questionnaire was confirmed with translation-back translation method. For construct validity, internal constancy and temporal stability, confirmatory factor analysis, Cronbach alpha coefficient and intra-class correlation coefficient were used respectively. The results showed acceptable fit of the 11-item model of Self Talk Questionnaire; fit index (RMSEA, 0.07; CFI, 0.98 & TLI, 0.97), internal consistency (motivational, 0.70; cognitive, 0.70 & total, 0.73) and temporal stability (motivational, 0.89; cognitive, 0.92 & total, 0.89) showed good reliability and validity of the Persian version of this questionnaire. These findings indicated good validity and reliability for the Persian version of Self Talk Questionnaire. Therefore, the Persian version of Self Talk Questionnaire can be employed as a suitable tool to study and evaluate self talk of Iranian male and female athletes.

The aim of the present study was to determine the effects of the number of training sessions in a week on psychological factors and memory of sedentary elderly. For this purpose, 45 sedentary male elderly (mean age, 73.15±6.54 years; height, 166.5±3.10 cm; weight, 64.45±4.06 kg; body mass index (BMI), 23.49±1.51 kg/m2) were voluntarily selected and divided into two training groups and one control group with their own desire. The 8-week training program in two-session group consisted of running with intensity of 40-55% of maximum heart rate for 2 sessions a week. Subjects in four-session group used a training program with similar intensity of two-session group for 4 sessions a week. Depression, anxiety, happiness and memory status were measured using the Beck Depression, Beck Anxiety, Oxford Happiness and Wechsler Memory tests. Data were analyzed using paired t test and one-way ANOVA (P

A match of the student's traits and teaching and training styles of sport skills has received researcher's attention. The aim of the present study was to investigate the interaction of physical self-concept and coach-oriented and self-regulated training styles in acquisition, retention and transfer of volleyball serve of collegiate female students. 50 female students (age: 18-25) were assigned to high and low physical self-concept groups. Then, each group was divided into coach-oriented and self-regulated styles. Participants exercised the criterion task for 6 weeks, 4 sessions per week in their special training condition. AAHPERD test and Physical Self-Concept Questionnaire were used for data collection. Acquisition tests were administered every week while retention and transfer tests were administered 3 days after the last training session and one hour after the retention test respectively. The data were analyzed by ANOVA with repeated measures and ANOVA. Results showed that the high self-concept group practicing the task with self-regulated style showed the best performance in acquisition, retention and transfer phases. The other groups showed similar performances. Results clearly showed that participants with high physical self-concept who exercised volleyball serve skill with self-regulated style had the highest skill acquisition and learning.