درخت حوزه‌های تخصصی

The aim of this study was to evaluate Sustained Attention Performance and Reaction Time in Shooters of National Rifle, Pistol and Trap Teams and compare these groups with each other. In this causal-comparative study, 33 players of men national teams, including 11 from rifle team, 11 from pistol team and 11 from trap team were selected by available sampling method and evaluated using continuous computer performance test. Covariance method was used to compare the variables of continuous performance test including (number of errors and reaction time) between the three groups. The results showed no significant difference in the performance of sustained attention and Reaction Time between the three groups ( P > 0.05), despite the superiority of the trap group in both components. Based on the findings of the present study, the performance of sustained attention and reaction time in the shooters of the national teams of rifle, pistol and trap is equally important. These findings can be justified by the similar nature of different shooting disciplines in the use of sustained attention and reaction time.

The purpose of this study was to investigate the effective factors on web browsing (Cyberloafing) of human resources in sport organizations. The research method was descriptive-correlational and based on structural equations and also the data were collected by questionnaire. The statistical population of the study consisted of all employees of the Ministry of Sport and Youth, among whom, 237 were randomly selected as sample and finally 225 (93.74%) questionnaires were analyzed. A 14-question questionnaire was used to collect the data. Finally, the collected data were analyzed in two parts: descriptive and inferential statistics using SPSS and LISREL software. The results showed that the predictive power of this model based on the sum of variance of the three factors was 61.52%. Also, there is a significant priority among the cyberloafing components, according to which the attitude of employees is in the first priority, descriptive norms in the second priority and perceived barriers in the third priority. Considering the way employees use the internet and web browsing, the need for more in-depth research and attention to these types of HR behaviors become more apparent.

Background: Water polo (WP) is a sport with great aerobic/ anaerobic physiological demands. There are few studies that have evaluated the physical demands during the WP game and its relationship with the physiological indices of aerobic fitness Aim: Our aim was to determine the aerobic/ anaerobic profiles of the WP athletes through specific test. Materials and Methods: WP male athletes participated in this study (24.5±5.6 years, 85.9±10.3 kg, 183.0±6.3 cm, n=23). The athletes performed an anaerobic WP test (TAnaWP) to determine the height (Alt- cm) of the 1st/ 15th/ 30th jumps, total time(s) of the jumps (TT30) and the fatigue index (FI). Blood lactate kinetics were determined immediately after (Lac0 min) and during the recovery period; Lac 1/ 3/ 5/ 8/ 12 min. They also performed an aerobic water polo test (TAerWP) to determine maximal oxygen consumption (VO 2 max) a heart rate (HRmax), peak blood lactate (Lacp) and the second lactate threshold (LL2). Results: The following results (in cm) were obtained in TAnaWP: Alt1st (44±6), Alt15th (32±7) and Alt30th (24±9); TT30 (56.9±9.5); FI (42.0±12.5%); (Lac0), (Lac1), (Lac3), (Lac5), (Lac8) and (Lac12) (5.2±1.7; 7.8±1.6; 9.0±2.0; 9.4±2.2; 9.2±2.7; 8.5±2.2 mmol/L, respectively). The mean maximal values for the aerobic test were: VO 2 max=44.4±5.3 ml/kg/min, HRmax=174.3±9.1 bpm, Lacp=8.6±2.1 mmol/L. The values obtained at LL2 were: 157.5±13.5 bpm/ 90.5±8.2% HRmax). Conclusion: The proposed tests may be a possibility to determining the physiological fitness of WP athletes.

This study aimed to investigate the effect of brand personality on the loyalty of Mazandaran Nassaji Football Club fans. This study was an applied descriptive survey. The statistical population of this study includes all fans of Mazandaran Nassaji Football Club in 2021, whose number was unlimited; therefore, 384 people were selected as a sample using the available Krejcie and Morgan table by available sampling method. Data collection tools in the present study are two standard questionnaires: the Siutsu personality questionnaire of sports teams (2012) and the Mahoni et al. loyalty questionnaire of sports team fans (2000). Descriptive statistics and inferential statistics were used to analyze the data by SPSS and Amos software. The results indicate that the brand personality and its dimensions (competition, prestige, ethics, originality, and credibility) affect the loyalty of Mazandaran Nassaji Football Club fans. It is suggested to the managers and officials of sports clubs to use the results of this research in the sports club in order to increase income and the need for self-sufficiency and attract new fans and fan loyalty.