List of Articles Athletes

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  1 - Relationship between Perception of Coach’s Leadership Style and Mental Toughness of Contact Athletes
  Jalil Moradi Kambiz Sadeghi Alireza Bahrami
  The purpose of this research was to study the relationship between coach’s leadership style and mental toughness of contact athletes. The sample consisted of 357 athletes who were randomly selected. All participants were asked to complete the Salzmann (1982) Leadership More

  The purpose of this research was to study the relationship between coach’s leadership style and mental toughness of contact athletes. The sample consisted of 357 athletes who were randomly selected. All participants were asked to complete the Salzmann (1982) Leadership Style Questionnaire and Mental Toughness Questionnaire of Clough et al. (2002). Pearson correlation coefficient and multivariate regression were used to analyze the data. The results showed that there was a significant relationship between coach’s leadership style and mental toughness of contact athletes. Also from the perspective of athletes, coach’s leadership styles, respectively supportive, combined and directive. The results of multivariate regression showed that we can predict athletes' mental toughness according to the coach’s leadership style. The findings of this study indicated that the coach leadership style as environmental variable and the relationship between coaches and athletes are important factors in the development of athletes' mental toughness. Manuscript profile
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  2 - The causal model of elite athletes' burnout based on athletes' perfectionism during the Covid-19: the mediating role of coaching style
  Sahar Zarei Mahmoud Mohebi Hassan  Garayagh Zandi
  Burnout encompassed a host of medical, psychological, emotional and performance-related issues that can always be affected by individual and coach factors in elite athletes; therefore, the aim of this study was to investigate the relationship between perfectionism and b More

  Burnout encompassed a host of medical, psychological, emotional and performance-related issues that can always be affected by individual and coach factors in elite athletes; therefore, the aim of this study was to investigate the relationship between perfectionism and burnout, mediated by perceived coaching style in the context of the Covid-19 epidemic. In this cross-sectional study, 258 elite athletes (M= 22.05 years, SD= 3.08; 148 male) participated and completed scales of multidimensional perfectionism, athlete burnout and coaching style. Data were analyzed using descriptive statistics by structural equation modeling. The results indicate that direct paths perfectionism to burnout, perfectionism to coaching style, coaching style to burnout, and indirect pathways to perfectionism to burnout were mediating by coaching style, significant. The results indicate that during the COVID 19, athletes who are less able to organize performance standards and expectations of themselves and others, and who are more committed to meeting external demands, are at higher risk of burnout. One could develop coach-education programmes that challenge beliefs regarding the effectiveness of controlling coaching behaviors to reduce perfectionist tendencies and expectations in athletes. In doing so, one might curtail the risk of burnout in athlete during the COVID 19. Manuscript profile
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  3 - The effect of supplementation of HMB (beta-hydroxy betamethyl butyrate) and plyometric exercises on performance and body composition of elite parkour athletes in Tehran
  Abdolrasoul  Daneshjoo Motahare Ghane Morteza   Ahmadi
  10.61186/jspac.32440.2.3.64
  Background: Parkour is a sport with alternating energy system in which some items such as lower body explosive power, muscular strength, production of high levels of power in the shortest period of time and high agility are of particular importance.Considering the anabo More

  Background: Parkour is a sport with alternating energy system in which some items such as lower body explosive power, muscular strength, production of high levels of power in the shortest period of time and high agility are of particular importance.Considering the anabolic and anticatabolic properties of beta-hydroxy beta-methyl butyrate (HMB), the aim of this study is to investigate the effect of taking this supplement along with plyometric training on body composition, agility and standing jump power of parkour athletes. Materials and Methods: For this purpose, forty parkour trained men (19-26 years old) have been chosen and randomly categorized into four groups: HMB group, Plyometric group, HMB and Plyometric group and control group. The training program was performed for plyometric and plyometric-HMB group, three sessions per week for eight weeks which took one hour each Session. Also HMB and plyometric-HMB groups consumed three grams of HMB per day for eight weeks. Body composition analysis and Illinois test and standing jump power test were conducted before and after eight weeks of plyometric training and HMB supplementation. Research data was analysed by ANCOVA statistical test. Results: The results of statistical analysis of each group showed that performing eight weeks of plyometric training significantly improves the standing jump power, agility and body fat percentage of the parkour athletes (p <0.05). Conclusion: These findings indicate that plyometric training increase the standing jump power and agility and reduce the body fat percentage in parkour athletes, but taking HMB supplement along with plyometric training only helps to burn more fat in the parkour athletes. Manuscript profile
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  4 - Effects of acute intensive exercise on hormone response in children, adolescents, and youth athletes
  Mohammad Reza  Fadaei Chafy Mohammad Reza   Annabi Toolgilani Ramin  Shabani
  Background: The transition from childhood to adulthood is associated with many physiological changes that result from hormonal changes. Despite this, it has been reported that hormonal response to exercise can be age-dependent.the purpose of this study was to investigat More

  Background: The transition from childhood to adulthood is associated with many physiological changes that result from hormonal changes. Despite this, it has been reported that hormonal response to exercise can be age-dependent.the purpose of this study was to investigate growth hormone, insulin, testosterone, and cortisol response to acute intensive exercise in children, adolescents, and youth male athletes. Materials and Methods: Twenty-nine eligible football players volunteered to participate in the study. Participants assigned to three groups: children (age = 10.88 ± 0.92, n=9), adolescents (age = 14.40 ± 1.17, n=10), and youth (age = 17.70 ± 0.82, n=10). The Bruce Protocol Stress Test was performed as an acute intensive exercise on treadmill. Plasma hormones were measured before and after the exercise. Results: The acute intensive exercise leads to a significant increase in circulating levels of testosterone (p = 0.02) and Cortisol in children (p = 0.001). In the adolescent group, only a significant increase in GH (p = 0.001) was observed. In the youth group a significant increase in GH (p=0.05) and testosterone (p=0.001) was observed. However, insulin levels did not change significantly after intensive exercise in all groups. Results showed that there were no significant differences between hormonal changes within the three groups. Conclusion: The results showed that the basal levels of some hormones and their changes after exercise were different. However, the pattern of hormonal changes after acute intensive exercise was similar in children, adolescents, and young athlete boys. Manuscript profile