درخت حوزه‌های تخصصی

Background: In the past few years, the increasing importance of the impact of exercise on physical and mental health has caused mobility wave around the world. Nevertheless, in Iran, a few people participate in physical activities. Aim: This study aimed to assess the reasons of nonparticipation in physical activity in Iran. Materials and Methods: This research is a descriptive and analytical approach conducted as a field study. The population of this research includes all people in Iran. Results: The results revealed that this factors are effective: three factors in individual characteristics variable (lack of sports skills, fatigue and impatience, fear of injury), four factors in inhibitor variable (lack of access to sports facilities and venues, poor quality of sports facilities and venues, being too busy, low income), four factors in environmental driving variable (lack of proper planning for sports, lack of awareness of the advantage of sport activities, feeling embarrassed after the loss, low number of exclusive sports facilities) and two factors in sports features variable (fear of winning and losing in sports, high intensity and duration of sport activities). Conclusion: Findings indicated that the environmental variable and inhibitor variable were more effective than two other variables, hence authorities and planners should pay more attention to these obstacles and problems with better management and provision of infrastructure facilities. These problems must be solved and strategies must be developed for promotion of sports in the country.

Background: Caffeine is widely recognized as a potent ergogenic aid commonly used to enhance exercise performance and recovery. However, individual responses to caffeine can vary significantly, a variability that might be explained by genetic differences.Aim: This study aimed to investigate the influence of the CYP1A2 rs762551 SNP on the effects of caffeine (CAF) consumption on growth hormone (GH) and testosterone (TS) levels response to resistance exercise (RE) in male athletes.Materials and Methods: Thirty resistance-trained men (mean age 21.72±4.06 years, weight 77.31±14.07 kg, height 179.31±5.08 cm) participated in a randomized, double-blind, placebo-controlled, crossover study. They consumed either CAF (6 mg/kg) or placebo (PL; 6 mg/kg maltodextrin) one hour before performing a RE protocol including three sets with 85% of 1RM and two-minute rest. CYP1A2 genotyping categorized participants as AA homozygous ("fast" metabolizers) or AC heterozygous ("slow" metabolizers). GH and TS levels were measured by ELISA methods.Results: Repeated measures ANOVA showed significant differences in GH levels across time (F=10.94, P=0.000), with significant time-group (F=4.3, P=0.019) and time-genotype-group interactions (F=3.83, P=0.024). One-way ANOVA indicated significant differences in GH levels between CAF and PL conditions in AA individuals, but not in AC/CC genotypes. For testosterone, significant effects of time (F=14.88, P=0.000) and time-group interaction (F=3.197, P=0.045) were observed. Post-RE CAF supplementation significantly increased serum GH and TS levels in AA individuals compared to PL. Both CAF and PL groups showed increased serum hormone concentrations post-exercise.Conclusion: In conclusion, the study demonstrated that caffeine consumption significantly increased serum levels of growth hormone and testosterone in individuals with the AA genotype of the CYP1A2 rs762551 SNP. These findings suggest that genetic variations play a role in the hormonal response to caffeine, which may have implications for exercise performance and recovery strategies.

Abstract Background and Objectives: Individuals with Autism Spectrum Disorder (ASD) face mobility challenges compared to their typically-developing peers. ASD is characterized by significant communication impairments and restricted, repetitive behaviors. Motor difficulties, including impaired balance, gait, slower movement speeds, delayed motor development, coordination issues, and exaggerated movements, are commonly associated with ASD, affecting 21% to 100% of individuals. Moreover, individuals with ASD often struggle with recognizing and assessing stressful situations, leading to heightened stress responses. They typically respond faster to fear, experience high levels of self-perceived stress, and find it difficult to cope with everyday stressors. Sensitivity to stress may be linked to dysfunction in the hypothalamic-pituitary-adrenal axis, resulting in increased fatigue and fatigability. Studies have shown that skills taught through explicit methods tend to be less robust in demanding situations such as fatigue, psychological stress, and multi-tasking. Consequently, less prescriptive approaches like analogy learning have been suggested. Analogies help learners grasp new concepts by relating them to familiar, similar concepts. The aim of this study was to investigate the effects of analogy learning and explicit learning on javelin-throwing performance in individuals with ASD and compare the effectiveness of both methods. Methods: This quasi-experimental study employed a pretest-posttest design with one control group. Ethical approval was obtained from the Research Ethics

The aim of this research was to determine the impact of a psychological skills training (PST) course on the level of sports injury anxiety and fear of failure. This research was of an applied and cross-sectional nature, and the statistical population consisted of elite football athletes, among whom 45 completed the existing scale. The measurement tools used were the Sports Injury Anxiety Scale (SIAS) and the Performance Failure Appraisal Inventory (PFAI) to assess fear of failure. The pre-test for sports injury anxiety and fear of failure was conducted in all three groups, and the experimental group followed the corresponding protocol for 12 sessions, after which the post-test was carried out. The data were analyzed using the dependent t-test and ANCOVA. The results showed that after the intervention, sports injury anxiety and fear of failure had decreased, and there were differences in the responses to the items on the sports injury anxiety and fear of failure test between the two experimental groups, the pre-exercise intervention and the pre-sleep intervention. In general, it can be concluded that practicing psychological skills can be a strategy for reducing psychological responses such as sports injury anxiety and fear of failure. Sports psychologists are advised to use this intervention to reduce sports injury anxiety and fear of failure, and consequently to improve performance.