درخت حوزه‌های تخصصی

This study examines whether the geographic distribution of lacrosse talent, as indicated by NCAA Division I All-American awards, has shifted from traditional hotbed states Maryland and New York to other regions over the past 25 years. Data on NCAA Division I All-American lacrosse players from 2000 to 2024 were collected and divided into five periods: 2000-2004, 2005-2009, 2010-2014, 2015-2019, and 2020-2024. The number and percentage of award winners from each state were calculated, and the number of states represented each year was tracked. This was compared with the growth in high school lacrosse participation. Maryland and New York's dominance decreased from 75.0% of All-American winners in 2000-2004 to 39.1% in 2020-2024. Concurrently, high school lacrosse participation grew from 46,206 in 2002-2003 to 107,865 in 2021-2022. The number of states represented increased from 8 in 2002 to 16 in 2024, indicating broader talent distribution. The decreased dominance of Maryland and New York suggests a diversification of lacrosse talent, aligning with nationwide participation growth and more states producing All-American players. This diversification highlights the successful expansion of the sport, ensuring a more inclusive talent pool and reflecting the positive impact of increased access to lacrosse across the country. Lacrosse development programs and recruitment strategies should expand beyond traditional hotbeds to support emerging regions, fostering a more inclusive and diverse talent pool, and enhancing the sport's growth at all levels.

Background: Late diagnosis and treatment of congenital hip dysplasia (CHD) can cause many problems in a person's daily life.   Aim: Therefore, the present study aimed to investigate and compare the effect of therapeutic exercises and education on parents’ weight bearing, range of motion, joint stability, and disease complications in 4-10-year-old children with congenital hip dysplasia. Materials and Methods: This semi-experimental study was conducted with a pre-test and post-test design on 40 children with CHD in two groups of 20 people: therapeutic exercises and education. The training program of the therapeutic exercises group was done on a middle day for 8 weeks from 60 to 90 min in each session. Also in the training group, parents were taught about the correct methods of sitting, standing, and lying down. Before and after the intervention, the subjects were evaluated by the researcher in terms of performance indicators. These indicators were evaluated with specialized tests (weight bearing with standing flexion test, range of motion with stork test, and joint stability with sitting test). The analysis of variance was used to compare the differences between groups in terms of the effect on the indicators. Results: Based on the findings, the difference between the two groups of therapeutic exercises and education to parents was significant in weight-bearing and range of motion (P=0.000 and P=0.000), but in hip joint stability and disease complications, no significant difference was observed (P=0.269 and P=0.163). Conclusion: Considering the greater effectiveness of the therapeutic exercises, it is suggested to design a codified program in the physical education program of U10 children to correct skeletal abnormalities, especially hip dysplasia.

The aim of the current research was to investigate the behavioral intention of coaches in virtual reality with considering the roles of Perceived Usefulness, Enjoyment, Performance Expectancy, Self-Efficacy, and Ease of Use. To collect the research data, a researcher-developed questionnaire with two sections was used. The first section included participants' demographic information, and the second section was used to collect data on research dimensions and variables. All questionnaires in this study utilized a 5-point Likert scale. The statistical population of this research included all sports coaches in Guilan province, Iran, both in individual and team disciplines, with a sample size of 350 individuals. SPSS software was employed for descriptive statistics, and Smart PLS was used for structural equation modeling. The results indicated that perceived usefulness, self-efficacy, enjoyment, ease of use, and performance expectancy have a positive and significant impact on the intention towards virtual reality behavior. Considering the current findings, the use of virtual reality in sports coaching can be recognized as a powerful tool for enhancing athletes' learning experiences, increasing enjoyment, and fostering a stronger and better inclination for active participation in sports activities.

Dynamic environments provide sports organizations with various threats and opportunities for optimization and development. This study aims to examine the effect of dynamic capabilities on organizational performance with the mediating role of ambidexterity and digital platforms in the Tehran Municipality Sports Organization. This practical, developmental, and quantitative study was conducted at the Tehran Municipal Sports Organization in Iran. A total of 213 questionnaires were obtained through Google Forms and the data analysis was conducted using SPSS26 and Smart PLS version 4. This study highlights the importance of digital platforms and ambidexterity mediators in the relationship between dynamic capabilities and organizational performance. It also addresses the lack of an effect of technological and market turbulence on the relationship between ambidextrous capabilities and performance. Finally, suggestions for future research are presented.