درخت حوزه‌های تخصصی

Purpose:  Prophylactic effect of PNF stretching is performed with an expectation to reduce the risk of eccentric exercise-induced muscle damage and enhance drop jump performance.The purpose of this study was to examine the effects of proprioceptive neuromuscular facilitation stretching combined with plyometric training on deep jump in non-athlete male students. Method: The study design was a single blinded, randomized, concurrent parallel trial. Forty-two non-athlete male students were volunteered to participate in this study. Participants were assigned into plyometric (n=21) and plyometric & PNF (n=21) groups. Maximum and minimum vertical displacements, flight time, joint power, maximum landing force, peak take off instantaneous velocity were measured at baseline and 48 hours following the plyometric exercise protocol. A Vicon (200 Hz) motion analysis system with six T-Series cameras and two Kistler force plates (1000 HZ) were used to record kinematic and kinetic data, respectively. A two-way repeatedmeasure ANOVA (group x DOMS) was used to analyze data. Results: There was a significant difference between the pretest and the posttest scores in the intervention group for maximum vertical displacement (p=0.028), flight time (p=0.042), and Power average (p=0.026). Conclusions: This prophylactic treatment on mechanical parameters of deep jump during timing was useful. Eventually, results suggest that preventative treatments can have a significant effect on maintenance functional parameters or even helping to slow exercise-induced muscle damage for alleviating its symptoms.

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.

Infertility is a health problem that affects about 10-15% of couples worldwide. Infertility is defined as the inability of couples to successfully conceive a child after one year of unprotected sex. The causes of infertility are often not easily identified. However, this disorder appears to be due to genetic or environmental factors, some of which may be modifiable and may be considered as a treatment option. The use of emerging infertility treatment technologies has been somewhat effective. However, these methods are very expensive and, in some cases, their success rate is relatively low. A sedentary lifestyle can lead to several disorders such as cardiovascular diseases, diabetes, cancer and conditions such as obesity. Obesity can have a negative effect on the fertility of couples. Overall, it seems that changing the sedentary lifestyle and increasing physical activity by performing regular exercise training can enhance the chances of fertility. However, it should be noted that strenuous exercise training has a negative effect on fertility.

Introduction: The present study aimed to determine the effects of a selected group exercise on motor skills and cognitive function in children with Autism Spectrum Disorders (ASDs).Methods: Forty children with ASD aged 5-12 years participated in this quasi-experimental study. The Bruininks–Oseretsky Test of Motor Proficiency (BOTMP), and the Wisconsin Card Sorting Test (WCST) were performed in 3 assessment stages of baseline, pretest, and posttest in Sports, Play, and Active Recreation for Kids (SPARK). The repeated-measures Analysis of Variance (ANOVA) and Analysis of Covariance (ANCOVA) were used for analyzing the collected data.Results: The current research results demonstrated that the selected exercises presented positive effects on motor skills (P<0.05) in the studied subjects; however, they indicated no significant effects on their cognitive function (P>0.05).Conclusion: According to the present study results, the SPARK’s training is effective on children with ASDs and severe mobility limitations; however, it presented no cognitive function improvement in the study participants.