درخت حوزه‌های تخصصی

The present research aims to investigate the effect of massage on fatigue and mood in female rowers. Pre-test and post-test of quasi-experimental design with a control group was used for the experiment. Participants in the study were 30 female rowers from Tehran province who participated voluntarily. The volunteer sample was randomly assigned into two experimental and control groups (15 people in each group). Pre-test was carried out for both groups. The subjects in the experimental group then participated in 12 massage sessions under the supervision of a massage expert. Meanwhile, both groups also continued their normal rowing exercises. At the end of the intervention, post-test was carried out for both groups. Rating of perceived exertion and fatigue scale (Borg, 1982), mood questionnaire (Vaez Mousavi, 2007), and a researcher-made questionnaire were used to measure variables. Statistical analysis of variance with repeated measurements was used to test the hypotheses. The results suggested that perceived intensity and fatigue were significantly reduced in the massage group compared to the control group (P <0.05). Also, anger (P=0.002), confusion (P=0.02), depression (P=0.028), mood fatigue (P=0.015), and stress (P=0.039) significantly decreased in the massage group compared to the control group. Force increased significantly in the massage group compared to the control group (P=0.008). In general, the results showed that 12 massage sessions could be used to decrease fatigue and improve mood in female rowers.

Religion, as a set of beliefs, dos and don'ts, as well as specific and generalized values, is considered one of the most effective psychological supports that is able to provide the meaning of life in every moment of life and in special circumstances with explanatory supports will save a person from suspense and meaninglessness. The present research is of a comparative causal type and its purpose is to investigate the effect of religious attitude and emotional intelligence on the aggression of professional wrestlers. Data related to religious attitude, emotional intelligence and the effect of these two on aggression were collected from 100 wrestlers using religious attitude questionnaires, Shott's emotional intelligence questionnaire and Nelson's anger questionnaire. The results of the research showed that religious attitude and emotional intelligence have an interactive effect on reducing the aggressiveness of professional wrestlers. Based on the subjects' statements, the results showed that aggression among people with high religious attitude was lower than among people with low and medium religious attitude. The results of two-variable variance analysis also showed that the interactive effect of the two components of religious attitude and emotional intelligence on aggression is statistically significant, in other words, religious attitude and emotional intelligence have an interactive effect on the aggression component of professional wrestlers.

Purpose: Haematological, hormonal, biochemical and physical performance parameters were altered after long-term soccer training in professional soccer players. These alterations can be influenced by different contextual factors such as playing surface, training load, duration of training and competition. The purpose of this study was to investigate the changes in the haematological, inflammatory, antioxidant and physical performance of beach soccer players during the competitive season of the beach soccer. Method: The study examined 15 elite beach soccer players in Iranian beach soccer primer league (age 24.64 ± 4.01 y, weight 75.08 ± 8.15 kg, height 181.00 ± 5.17 cm, body mass index 22.76 ± 2.36) from the pre-season, mid-season and end-season. Measurements of haematological, inflammatory, antioxidants indices and aerobic / anaerobic power were repeated in the pre-season, mid-season and end-season. Repeated-measures analysis of variance was used to examine indicators change during league season. Results: Significant decrease in SOD (p = 0.001), TAC (p = 0.043) and anaerobic power (p ≤ 0.048) and significant increase in GPx (p = 0.001), ALT (p = 0.022) was observed from pre-season to the end of the season. LDH levels showed a significant increase in the mid-season compared to the pre-season (p = 0.042) and a significant decrease at the end of the season compared to the mid-season(p = 0.014). However, no significant changes were observed in other indices during the competition season(p ≥ 0.05). Conclusions: It is suggested that some physical and physiological fatigue markers ar increase during mid-season. Therefore, beach soccer players may be  monitored  continuously during the competition season in order to be able to provide the best training, nutrition and recovery systems for performance optimization. Coaches may use the interplay between biomarker alterations and physical performance changes to better manage workload and monitor fatigue during beach soccer training and competition.

Today, competition to improve the quality of services is recognized as a critical strategic issue for sports venues. The purpose of this study is to determine the impact of service quality on improving loyal behaviors. (A case study of customers of wrestling sports complexes in Kermanshah province). The research method was descriptive-correlational and was conducted in the field. The study's statistical population was the customers of wrestling halls in Kermanshah province. In this study, 450 people were considered as the statistical sample of the study by random cluster sampling. Bonajsui's (2012) Research Work Questionnaire was used to measure research variables. Univariate and multivariate regression and the Friedman test were used to analyze the data. The regression test results showed that the service quality variable has a predictive power of about 18% of the variance of communication quality. Furthermore, the results showed that the variables of personnel responsiveness, reliability, and trust in personnel could be significant predictors of the communication quality component. Also, the results showed that the variable of communication quality could be a significant predictor for the components of loyal behavior, word of mouth, purchasing desire, and dissatisfaction. The study's results showed that the quality of services affects the quality of communication. According to the results, the responsiveness of the complex staff, reliability, and trust in the personnel have a positive effect on the quality. At the same time, no relationship was found between the tangibles and empathy components with the relationship's quality. According to the results, improving the quality of services in sports complexes and the quality of customer relations are the main factors in the occurrence of loyal customer behaviors and their reappearance in the future.

Psychological commitment has been to date one of the interesting research topics in sports psychology. To achieve a deeper understanding of sports fans' psychological characteristics, this study aimed to design a qualitative model of the factors affecting psychological commitment in football fans in Iran based on grounded theory approach. In this qualitative-analytical study, 27 experts in the field of sports and fan loyalty in the Iranian Football Premier League from the top universities in Iran were interviewed based on purposive and triangulation sampling approach. The data analysis was also performed by open and axial coding, of which 53 concepts and 11 categories were classified under five general themes. The developed research model consisted of five major effective factors including: triggers, psychological characteristics, demographic characteristics, reference groups, and club-related issues. The results revealed that such factors could be the main actors shaping sports fans' psychological commitment.

The main purpose of this study was to investigate the role of sports tourism development in job creation. The study was a descriptive survey study conducted in the field. The research population consisted of professors and graduate students studying sports management, entrepreneurship, and tourism at Tehran universities. The research samples were selected through a convenience sampling approach, and finally, 190 people completed the questionnaires. The instrument used in this research was adopted from library studies and literature reviews as well as interviews with five experts. This questionnaire has 10 items for the tourism development component, three items for the direct job creation component, and three items for the indirect job creation component. The face and content validity of the final questionnaire was confirmed by eight professors of sports management, entrepreneurship, and tourism. Convergent and divergent validity and composite reliability were checked and confirmed by the PLS software. Findings indicated that sports tourism had a positive and significant effect on direct job creation and all its dimensions; additionally, sports tourism had a positive and significant effect on indirect job creation and all its dimensions. The study results demonstrate that the development of sports tourism in Iran provides a basis for increasing direct and indirect job creation and permanent, seasonal, and part-time employment.

The purpose of the present study was to identify barriers to implementing innovation in sports clubs during the COVID-19 pandemic. The research approach was mixed. In the qualitative part, interviews with 13 owners of sports clubs were conducted. The statistical sample in the quantitative part, based on Structural Equation Modeling (SEM), included 200 sports club owners in Chaharmahal and Bakhtiari, Iran. The results showed that barriers to implementing innovation in sports clubs were individual, structural, and environmental obstacles. Considering the entrepreneurial ecosystem and all stakeholders involved in the sports community, providing favorable conditions such as intellectual property protection, financial support, research, and development support, as well as improving access to financial capital, can pave the way for the creation and implementation of sports innovations in clubs, especially in crises. 

Background: Researchers have studied practical applications of high-intensity interval training and hypoxic training. PGC-1α, IGF-I, and HIF-1α are generated from high-intensity interval training and affect muscle cells. Altitude training also produces HIF-1α, which induces erythropoietin and increases the number of red blood cells. However, due to the limit on training intensity and cycle, it was replaced by normobaric hypoxia training. Purpose: To investigate the effects of 2-day high-intensity interval training on muscular anaerobic metabolism at varying oxygen concentrations for 2 days. Method: Ten subjects performed 2 consecutive days of intermittent hypoxia-hyperoxic training (IHHT); intensity of training was determined by the sprint test results. IHHT comprised 4 sets of 3 repetitions for 40 seconds (4 × 3 × 40 s); the intensity and oxygen concentration were 80% of maximal effort and 13% oxygen for the first and third sets, and were 90% of maximal effort and 21% oxygen for the second and fourth set; participants walked for 3 min wearing an oxygen mask (O2 80%) before each set. Differences in biological parameters between the two days of training was analyzed by t-test. Results: The difference of mean lactate levels between two days were 0.96 ± 0.75 mmol/l at Set 3 (P = .003) and 1.05 ± 1.12 mmol/l at Set 4 (P = .016), respectively. Mean ammonia concentrations at Set 4 were 117.70 ± 29.8 μmol/l for the first day and 94.50 ± 14.45 μmol/l for the second day (P = .057). The difference of heart rate were 4.20 ± 5.05 min-1 at Set 1 (P = .027) and 4.00 ± 5.48 min-1 at Set 2 (P = .046). Conclusions: Two-day intermittent hypoxia-hyperoxic training affected lactate and heart rate.