درخت حوزه‌های تخصصی

The main purpose of this study was to provide a framework of effective components in Iranian championship sports with a data mining approach. The research method was qualitative. The advanced search was performed in the general framework of factors affecting the sports industry and development and integration with data-driven technologies. Based on the literature review, 15 frameworks in the field of sports and 13 frameworks for the development and integration of the sports industry with technology were identified. After the data analysis, a researcher-developed framework for the championship sports industry for the use of data-driven technologies and data mining was presented in three parts. In the first part, nine influential factors including athletes/champion teams, leagues/clubs, stadiums/sports venues, fans/spectators, brands, media, government, academic/research institutions, and technology companies, were identified. In the second part, a strategic plan based on the development and integration of sports industry with data-driven technologies and data mining was presented, which includes four stages: Identifying and selecting talents, pre-game and match preparation, in-game and match activities, and post-match and match analysis. All data-driven activities and data mining in the first and second sections were performed by the IBM data science analysis methodology presented in the third section. Then, a conceptual framework was provided to 7 experts and their opinions were collected through semi-structured interviews and focus group methods. This conceptual framework enables sports managers to plan for their organization and adopt appropriate strategies using data-driven technologies and data mining.

Shooters typically make great efforts to strengthen their physical and motor abilities, but are often less aware of the cognitive and psychological factors that affect their performance and skill performance. Therefore, it seems that shooters, especially novice shooters, are not very familiar with the mental skills related to shooting and pay less attention to mental training. However, cognitive training has recently been recognized as one of the basic skills required in perceptual-motor activities. The present study was conducted to determine the effect of training cognitive imaging strategies versus training of motor representation strategies on the acquisition and retention of shooting skills. This randomized controlled clinical trial study was performed on 45 undergraduate military science students with an age limit of 18 to 25 years, studying in the second semester of 1997-98. Subjects were randomly selected from a university of military sciences in Tehran and randomly divided into three groups of mental imagery, motor representation and control using a table of random numbers. The intervention groups received a three-week mental imagery training program, motor representation along with shooting training (five sessions per week). The control group only participated in shooting training. In order to evaluate the performance of shooters in the pre-test, post-test and memorization stages, a SCAT machine was used. Statistical analysis was performed using SPSS20 software and p value less than 0.05 was considered significant. The results of combined analysis of variance showed that both cognitive imaging and motor representation interventions had a significant effect on improving the record of novice military shooters (P≤0.05). The results showed that although there was no significant difference between motor representation and cognitive imaging groups in the post-test stage, however, a significant difference was observed between the motor representation and cognitive imaging groups (P = 0.006) in the retention stage. The results show that cognitive imagery and motor representation interventions can improve the performance of novice military shooters, although motor representation is more likely to be effective than cognitive imagery

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.

Background: Gene polymorphisms are related to athletic performance. Angiotensin converting enzyme gene polymorphism is essential in identifying talent and guiding adolescents to appropriate sports. Aim : The aim was to investigate the relationship between the angiotensin gene and endurance performance of novice adolescent wrestlers in Ardabil. Materials and Methods: Subjects were 15 Amateur adolescent wrestlers in Ardabil (age: 13.07±1.53 years, height: 164.60±10.68 cm, weight: 60.14±6.32 kg, BMI: 22.22±4.98 kg/m 2 ) with three-year wrestling. Chest and thigh muscle endurance, abdominal fat percentage and cardiovascular endurance, chest press, and squat muscle endurance were measured. ACE polymorphism was determined using tetra-ARMs polymerase chain reaction (PCR) and compared direct DNA sequencing in salivary samples. Chi-square and ANOVA were used to compare frequencies and their relationship with performance indicators. Results: ACE DD genotype frequency was higher in novice adolescent wrestlers, and there was a significant difference between ACE polymorphism frequency ( P =0.008). There was a significant difference between ACE genotype distribution with endurance performance of pectoral and triceps ( P =0.004) muscles, body composition ( P =0.0001), and Vo 2 max ( P =0.0001). There was a significant difference between body composition and Vo 2 max of Amateur adolescent wrestlers with ACE DD ( P =0.0001), ACE II ( P =0.0001), and between body composition and Vo 2 max with ACE II ( P =0.0001), ACE DD ( P =0.0001), and ACE ID ( P =0.0001). In body composition, ACE II was significantly higher compared to ACE DD ( P =0.0001) and compared to ACE ID ( P =0.0001). Also, in Vo 2 max, ACE II was significantly higher compared to ACE DD ( P =0.0001) and compared to ACE ID ( P =0.0001). Conclusion: Findings showed the superiority of ACE DD polymorphism and its relationship with the endurance performance of novice adolescent wrestlers in Ardabil. ACE DD polymorphism is probably essential in wrestler success. Other research with more subjects and other genes is important.

Background: Force plates are widely used in biomechanics and sports sciences to measure various aspects of human movement. The accuracy and reliability of force plate measurements are critical for valid data interpretation. Aim: The purpose of the study was to evaluate the validity and reliability of the Iranian force plate in the vertical, anterior-posterior, and medial-lateral directions using two manual dynamometers and a load cell. Materials and Methods: In this study, the force plate device utilized had a frequency of 1200 Hz and was manufactured by the Danesh Salar Iranian Company. Additionally, to determine the device's validity, we used Lafayette hand-held dynamometers manufactured in the United States and a load cell by Zemik. Pearson's correlation coefficient was employed to determine the validity of the force plate, while the internal consistency coefficient (ICC) was used to assess the force plate's reliability. Results: The study findings indicated a significant and high level of reliability between the maximum force obtained from the force plate device and manual dynamometer devices and load cell. Additionally, the internal consistency coefficient was found to be excellent (very high) for 20 trials in the three directions of vertical (0.98), anterior-posterior (0.96), and medial-lateral (0.97). Conclusion: The study demonstrated that the Iranian force plate is a reliable device for measuring maximum force in the three directions of vertical, anterior-posterior, and medial-lateral, with very high validity.

Background : Duchenne muscular dystrophy (DMD) is one of the most rampant x-linked recessive lethal genetic disease with prevalence of approximately 1 out of 3500-5000 newborn boys worldwide. DMD is mutations-induced in gene encoding dystrophin that prevent the production of the muscle isoform of dystrophin (Dp427m). Aim: This study aims to evaluate the impact of hydrotherapy on health-related quality of life and body composition changes, as well as how it affects on skeletal muscle strength in boys with DMD. Materials and Methods:  Eight boys, ranging from 6 to 12 years old with DMD were enrolled in this study. The patients were randomly assigned to either a hydrotherapy group as the intervention group (Group 1; n=4) or a non-exercise group as the control group (Group 2; n=4), to receive 12 sessions of a hydrotherapy program. The patients were assessed for changes in muscle strength in the lower limbs and back, left and right quadriceps, left and right-hand grip, LBM, SMM, and general mobility and balance, before and after hydrotherapy. Results : Significant improvements in general mobility and balance were observed, along with a significant increase in muscle strength and lean body mass ( P <0.05). Conclusion : This study suggests that hydrotherapy with a precise protocol of low to moderate intensity can improve general mobility and balance, increase muscle strength in the lower limbs and back, left and right quadriceps, left and right-hand grip, and LBM in patients with DMD. The increase in strength is accompanied by increase in LBM, which not only has implications for function but also has much broader impacts on the health-related quality of life in patients.