درخت حوزه‌های تخصصی

Background: Hyper kyphosis is a common postural issue that affects many women, often leading to negative body image. Aim: The purpose of this research was to investigate the impact of an 8-week corrective exercise program on the body image of women with hyper kyphosis. Materials and Methods: The research method used in this study was quasi-experimental. The study population consisted of female students aged 18 to 26 years with hyper kyphosis at Shahid Rajaee University. Participants were randomly assigned to either the experimental group (n=20) or the control group (n=20). Hyper kyphosis was measured using a flexible ruler, while body image was assessed using the Body-esteem Scale for Adolescents and Adults. The questionnaire had a reliability coefficient of 0.83 as measured by Cronbach's alpha. After 8 weeks of corrective exercise, both the experimental and control groups completed the questionnaire again. The control group did not receive any training during this time. The data were analyzed using the mixed ANOVA method with SPSS-26 software at a significance level of 95%. Results: The results of the mixed ANOVA analysis showed that the main effect of the training group and the interaction between the group and test stages were significant in the post-test stage for the dependent variable of total body image (F=6.82, P =0.013), appearance (F=6.72, P =0.014), attitude (F=8.81, P =0.005), and kyphosis angle (F=18.91, P =0.000). However, there was no significant effect of training on weight satisfaction. Conclusion: The results of this study indicate that eight weeks of corrective exercise significantly reduced the hyper kyphosis angle ( P =0.01), resulting in an improvement in the subjects' posture and a decrease in deformity. This improvement in appearance led to an increase in satisfaction with their appearance, as demonstrated by improvements in their body image.

This study aimed to identify and analyze the factors affecting the athletic commitment to train and compete in the armed forces. The research method was applied, and the study's statistical population consisted of athletes affiliated with the Armed Forces across the country, of whom 290 were selected as the sample. For data collection, in the beginning, the qualitative method and interview with elites were used, then the quantitative method containing a demographic questionnaire and sport commitment questionnaire (researcher-made) with 33 questions is used. The questionnaire comprises six dimensions: facilities, incentives, rules and regulations, financial and personal factors, and enjoyment and satisfaction. Collected data through equation modeling were analyzed using Amos 21 software and SPSS 22 software to identify the factors affecting the variables. The results showed that the research model had a good fit, and a positive and significant relationship existed between facilities and incentives, incentives, rules and regulations, finances, personal factors, and enjoyment and satisfaction with sport commitment. Finally, it is recommended that the physical education managers of the armed forces take advantage of all the national facilities to increase their athlete's athletic commitment.

The purpose of this study was to investigate the relationship between narcissism and coping strategies with competitive stress in elite athletes. This research was a descriptive-correlation research method (structural equation modeling). In terms of purpose, the present study was an applied type of research and, in terms of time, was a kind of future research. The statistical population of this study was all elite male and female athletes of East Azarbaijan province in two age groups of youth and adults from team who participated in the championship of 2019. According to the Cochran formula 270 athletes were selected as a sample size. To collect demographic information and measure variables, Individual information form, narcissism and coping strategies in sports competition questionnaires were used. Kolmogorov-Smirnov test (KS) was used to verify the natural distribution of data, Cronbach's alpha coefficient to calculate the internal consistency of instrument, Pearson correlation coefficient to determine the correlation between variables, Confirmatory factor analysis (CFA) was used to study the structural equation modeling and (SEM) models to test the fitting of the base model with the data and to determine the structural relationships between the variables at 95 confidence level, using SPSS22 and Liserl software version 8.53. The results showed that pride had with the greatest impact and the most important role on thought control strategy, imagery, logical analysis, search support, evacuation of unpleasant emotions, distraction of mind and surrender/withdrawal. To be Right had the greatest impact and the most important role on relaxation strategy, efforts to deal with competitive stress in elite athletes.

Purpose: The activity of plasma liver enzymes is intensified under the influence of sports activities, which is affected by the duration, intensity, type and method of training. The purpose of this study was to investigate the effect of a special endurance training session on the activity of serum alkaline phosphatase and aspartate aminotransferase liver enzymes in inactive young men. Methods: In this semi-experimental study, 16 young inactive men were purposefully selected and examined in two groups (experimental and control). The experimental group performed Bruce's protocol after preliminary warm-up. Blood samples were collected before the test, immediately after the test, 24 hours and 48 hours after the test from both groups at the same time, and the amount of serum ALP (Alkaline Phosphatase) and AST (Aspartate Transaminase) enzymes were measured using an Auto analyzer. Statistical analysis of the data, independent T-test was used to compare the results of two groups and Bonferroni's post hoc test was used to determine the difference between different stages of sampling with a minimum significance level (P≥0.05). Results: The results of the independent T-test in the comparison between the groups showed that there is a significant difference between the two groups in the amount of ALP enzyme in the time intervals immediately after the activity (P≥0.020), but in the time intervals of 24 (P≥0.177) and 48 hours (P≥0.136), there is no significant difference between the two groups after the activity. The results of the independent T test did not show any significant changes in the amount of AST enzyme in any of the time intervals in the comparison between groups. Conclusion: Fatigue-inducing sports activity leads to an increase in the amount of enzymes, ALP, this increase can be a sign of damage to liver cells or heart muscle. Considering the role of recovery in liver damage, it seems that by considering enough rest time, it is possible to help improve the adaptation process while preventing the occurrence of muscle and liver damage