Return to Play and Performance After Anterior Cruciate Ligament Reconstruction in Soccer Players: A Systematic Review of Recent Evidence.

BACKGROUND: The available literature referring to the return to play (RTP) and performance after anterior cruciate ligament reconstruction (ACLR) has already been comprehensively summarized in team sports such as basketball or American Football. Therefore, in this sense, it is necessary to synthesize evidence relating to the mentioned parameters in soccer players who underwent ACLR. OBJECTIVE: The aim of this systematic review was to examine RTP and the performance of soccer players after ACLR. METHODS: Three electronic databases, Web of Science, Scopus, and PubMed, have been comprehensively searched to identify relevant articles. The following inclusion criteria were applied: (1) the sample of respondents consisted of soccer players irrespective of their age, sex, or level of competition; (2) athletes experienced anterior cruciate ligament injury and underwent ACLR; (3) outcomes estimated referred to the RTP, RTP at the preinjury level of competition, RTP time, performance, and career duration of soccer players; (4) studies were written in the English language. The methodological quality of the research was evaluated using the Methodological Index for Non-Randomized Studies (MINORS). RESULTS: Databases searched yielded a total of 694 studies, of which 17 fulfilled the eligibility criteria and were included in the final analysis. These included 3657 soccer players, 2845 males and 812 females, who underwent ACLR and most commonly competed at the elite, national, amateur, and recreational levels. The results obtained indicated that 72% of soccer players successfully RTP and 53% RTP at the preinjury level of participation after ACLR. In addition, recent evidence provided in this literature review demonstrated that mean RTP time was 264 days or 8.7 months. Moreover, the majority of the studies unambiguously suggested that performance related to statistical aspects noticeably deteriorated compared with both the preinjury period and noninjured athletes. The mean career length of soccer players following ACL surgery was approximately between 4 and 5 years. CONCLUSION: Although a high percentage of athletes RTP after a relatively short period of absence from the sports field compared with other sports closely related to soccer, ACLR negatively impacts soccer players' performance and career duration.

Relationship between BMI and skinfold thicknesses to risk factors in premenopausal and postmenopausal women.

Studies conducted on children and adults have pointed to the correlation of BMI (kg/m2) with risk factors for certain diseases. Other studies have stressed a more intense correlation between the risk factors and indicators of subcutaneous fat obtained in other ways. The aim Of the study was to compare the intensity of correlation between the risk factors and triceps and subscapular skinfold thickness in relation to BMI. The study included 53 postmenopausal and 107 premenopausal women, the risk factors were assessed upon systolic and diastolic blood pressure, glucose concentration, triglyceride and cholesterol levels. Statistically significant differences were established in almost all variables referring to premenopausal and postmenopausal women, except in body height, subscapular skinfold thickness and tryglyceride concentration. Significant correlation with the risk factors was detected in BMI and both skinfold thicknesses, while the subscapular thickness correlates more intensively with the risk factors than it is the case with the triceps thickness. The results indicate that BMI equally correlates with risk factors as well as skinfold thickness.

Association between evergrande FC's club debt and Chinese super league's profitability from 2014 to 2019.

Purpose: This study examined the role of Evergrande FC's club debt on the Chinese Super League (CSL)'s profitability from 2014 to 2019. Methods: We extracted the financial statements of Evergrande FC and evaluated its correlation with the profitability of CSL and Evergrande Group, which serves as a direct indicator of commercial growth. Results: The association between Evergrande FC's net loss and gross debt and CSL's profitability is positive, strong (all correlation coefficients > .89), and statistically significant (all p < .05). The association between Evergrande FC's net asset value and CSL's profitability is negative, strong (correlation coefficient = -.97), and statistically significant (p < .05). Conclusion: These data imply that there is a good likelihood of a causal relationship between the negative club returns generated by real estate investments and CSL's rapid commercial growth from 2014 to 2019. In essence, a dovish monetary-regulatory policy nexus during this period drove up the CSL premium. This business history from the sports industry is another illustration of how the modern coupling of economic leverage and regulatory policy could have asymmetric impacts on short-term market growth. Based on this debt-fueled business history, CSL should progress to a higher level of development in the future.

The influence of body mass index on physical activity engagement following anterior cruciate ligament reconstruction: A systematic literature review.

Background: The objective of this study was to summarize available literature that explored the impact of body mass index (BMI) on physical activity participation among individuals who were subjected to the anterior cruciate ligament reconstruction (ACLR). Methods: A total of three electronic databases, including Web of Science, Scopus, and PubMed, were comprehensively searched to identify relevant investigations. The following inclusion criteria were applied: (1) study design was observational; (2) participants underwent the ACLR; (3) BMI was estimated as a predictor variable; and (4) outcomes evaluated referred to physical activity. The risk of bias was assessed with the National Institutes of Health Quality Assessment Tool for Observational Cohort and Cross-Sectional Studies. Results: After a database search, 787 studies were found, and only 10 of them met each of the eligibility criteria and were included in the qualitative analysis. Regarding respondents' characteristics, 7171 individuals underwent ACLR, 4080 males and 3091 females, with a mean age of 25.5 years. Most importantly, the average BMI of the examined population was 24.9 kg/m2. In all studies, physical activity was evaluated subjectively using the Tegner activity scale and the Marx activity scale. The main findings unambiguously demonstrated that a negative relationship between BMI and physical activity engagement was observed. More specifically, there is convincing evidence that BMI over 25 kg/m2 harmfully affected subjectively assessed physical activity in individuals with a history of ACLR. Conclusion: The results obtained in the presented research indicated that increased values of BMI were a factor that correlated with reduced physical activity levels in the ACLR population. Hence, taking into account the clinical and health implications of reduced physical activity participation, stimulation of a healthy lifestyle, such as a combination of adequately designed physical exercise and nutrition, seems necessary for the analyzed population.

Exploring the Well-Being of Slovenian and Serbian Sport Science Students during the COVID-19 Pandemic of Summer 2022.

The COVID-19 pandemic profoundly changed everyday life of social actors, which inferred mental health and well-being concerns. As students of health-related studies tend to adapt better to difficult circumstances, in this study, we explored the effect of the pandemic on sports science students' well-being during the summer of 2022. The research was conducted in Slovenia and Serbia. The sample comprised n = 350 students. The PERMA-Profiler, a 15-item self-reported questionnaire, was adapted to assess well-being across five elements: positive emotions, engagement, relationships, meaning, and accomplishment. Data were collected with a questionnaire through the summer of 2022 (from May to July) and analyzed in SPSS, AMOS 26.0. The results revealed normal functioning (M = 7.72, SD ± 1.38) for the overall well-being of the students. Although all dimensions indicated high scores, relationships (M = 7.95, SD ± 1.63), meaning (M = 7.76, SD ± 1.69), and engagement (M = 7.73, SD ± 1.36) rated the highest. Furthermore, the instrument was acceptable, as the confirmatory factor analysis showed adequate reliability based on Cronbach's alpha (15 items, α = 0.94) and strong internal correlations between the PERMA dimensions. This study contributes to the previously published research, emphasizing the positive responses and successful coping of sports science students in times of complex situations, such as the COVID-19 pandemic.

Out-of-School Sports Participation Is Positively Associated with Physical Literacy, but What about Physical Education? A Cross-Sectional Gender-Stratified Analysis during the COVID-19 Pandemic among High-School Adolescents.

Physical literacy (PL) is one of the main concepts related to lifelong physical activity (PA) and physical fitness (PF), but there is a lack of information on factors that might be associated with PL in adolescents from southeastern Europe. This study aimed to evaluate the associations between PF, participation and achievement in physical education (PE), out-of-school participation in sports, and PL in high school adolescents from Croatia. Participants were 298 high school students aged 14−18 years (191 females). Variables included school age, PE grade, sports participation, anthropometric indices, four PF tests, and PL (evidenced by CAPL-2-knowledge and understanding questionnaire (CAPL-2-KU) and PLAYself questionnaire). Gender-stratified analyses of differences were conducted using the t-test for independent samples or the Mann-Whitney test. Associations between variables were calculated with Pearson's product moment correlation or Spearman's rank order correlation. PF was positively correlated CAPL-2-KU in both genders. PE grade was significantly associated with PLAYself score (Pearson's correlation = 0.36 and 0.38, p < 0.001 for boys and girls, respectively) but not with the CAPL-2-KU score. School age was not correlated with PL among boys, but there was a significant but negligible correlation between CAPL-2-KU and school age in girls (<2% of the common variance). Adolescents involved in sports had better PL and PF compared with adolescents not involved in sports. In conclusion, participation in out-of-school sports offers a good base for developing PL. Although this study took part over the COVID-19 pandemic period when the regular PE curriculum was significantly altered, the poor associations between school age and PL could lead to the assumption that the current PE curriculum does not allow for improvement of PL in later high school age, which warrants further investigation.

Youth Athletes' Perception of Existence and Prevalence of Aggression and Interpersonal Violence and Their Forms in Serbia.

Aggression and interpersonal violence (IV) against children and youth are issues in contemporary society. The current study reports on the youth athletes' perception of the aggression and IV prevalence and its manifestation forms in a Serbian context. The sample included athletes (N = 2091) between the age of 11 and 18 years. Data were collected through an ad-hoc questionnaire created by the authors. Respondents' answers to introductory questions about the frequency of IV indicated its absence (78.1%). However, the answers to the questions about specific forms of violent peer behavior indicated forms as well as the time and place where IV most often occurs. They underlined that IV takes place mainly after training or competition and during sports camps; and that the dressing room is the most favorable place for these behaviors. They also confirmed that the most prevalent subtypes of IV are psychological (roughly 40%) and physical (approximately 30%). The respondents' opinions and experiences about IV (psychological, physical, sexual) revealed that factors such as gender, location, and parents' education level may influence the IV manifestation. Highlighting the prevalence and the most frequently manifesting types of aggression and IV could help in awareness-raising of these social issues.

Children's Daily Routine Response to COVID-19 Emergency Measures in Serbia.

Objective: The emergence of coronavirus in Serbia as well as in other European countries led to the declaration of a state of emergency, which, among other measures, included a switch to online education, the lockdown of public life and organized sports, and a curfew from 5 pm to 5 am. This study aimed to investigate the extent to which these measures affected children's daily routines. More specifically, it aimed to determine how children maintained their learning, physical activity, and screen time routines from the period before the state of emergency was declared. Methods: Response to an online parent-reported questionnaire was conducted (N = 450). The factorial validity of the scales was prepared using confirmatory factor analysis, with acceptable fit indices. Based on that, the authors tested the interrelations between dimensions using structural equation modeling in SPSS, AMOS 24.0. Results: The study results indicate a positive relationship between school achievement and study time (ß = 0.25). They also indicate that children who were physically active before the pandemic continued their activities during the emergency state (ß = 0.53). Physical activity impact during the COVID-19 emergency measures reduces children's behavior changes (ß = 0.55). Finally, they highlight that children who spent more time with multimedia content had greater changes in anxiety, sensitivity, nervousness, and worry due to COVID-19 emergency measures (ß = -0.38). Conclusions: Healthy lifestyle habits formed in childhood are suggested to be responsible for the greater "resistance to change" shown by the children from this study.

The Association Between Regular Physical Exercise, Sleep Patterns, Fasting, and Autophagy for Healthy Longevity and Well-Being: A Narrative Review.

This narrative review of the literature assessed whether regular physical exercise and sleep patterns, fasting and autophagy, altogether can be an adequate strategy for achieving healthy longevity and well-being within different stage of life. There are a large number of studies dealing with well-being and healthy longevity; however, few of them have given us a specific formula for how to live long and healthy. Despite all the advances that have been made to create adequate physical exercise programs, sleep patterns or nutritional protocols, the relation between different types of fasting, nutritional supplementation as well as regular physical exercise and sleep patterns have not yet been satisfactorily resolved to cause the best effects of autophagy and, therefore, well-being and healthy longevity. In this way, future studies should clarify more efficiently the relationship between these variables to understand the association between regular physical exercise, sleep patterns, fasting and autophagy for healthy longevity and well-being.

Birth weight and metabolic risk in women of different nutrition levels.

INTRODUCTION: Nowadays, obesity is one of the most important health problems in both developed and developing countries. Recent studies have shown a significant association of obesity and its complications with birth weight. The aim of our study was to analyze the effect of birth weight on the occurrence of metabolic disorders in normal weight and obese women. MATERIAL AND METHODS: The study group included 134 females of average age 41.71 +/- 11.56 years. In these women the relationship between birth weight and anthropometric and biochemical parameters, as well as with blood pressure values was analyzed. RESULTS: Our results show that women with higher birth weight had higher values of the anthropometric indicators of fat mass and distribution (such as body mass index, total fat mass, waist circumference and hip circumference), as well as higher values of high density lipoprotein-cholesterol. In contrast, the values of systolic and diastolic blood pressure and low density lipoprotein-cholesterol were lower in women with higher birth weight. The analysis of metabolic profile in women of different nutritional status indicates that normal weight women with metabolic syndrome had a lower birth weight when compared with normal weight women without metabolic risk (3.15 vs. 3.40 kg, p>0.05). CONCLUSION: Higher birth weight is related with higher fat mass, while lower birth weight is related with metabolic disturbances. Birth weight seemed to be determinant of metabolic risk in normal weight women

Predicting the future of sports organizations / Previndo o futuro das organizações desportivas / Predecir el futuro de las organizaciones deportivas

The current crisis of sport in Serbia justifies its prediction of real potential future of sport organizations. Sample of respondents (N=277) was divided in two subsamples: 113 professional persons involved in the management of sports clubs ("experimental" sample) and 164 individuals ("control" sample). The results of structural analysis showed that experimental sample based its vision on the staff as a determinant of the system, which is providing creativity as a characteristic of the organizational culture of the club. Control subsample of respondents could indicate some characteristic variables to predict the future of clubs, but can't say a clear prediction system based on a long sequence of reasoning. We can conclude that the mentioned two sub-samples are differerent in terms of the ability to orient to predict the future of their clubs on the basis of assessment of the key variables that shape the future scenarios.

A crise atual do esporte na Sérvia justifica sua predição para um potencial real no futuro das organizações desportivas. Amostra de entrevistados foi dividida em duas sub-amostras: 113 pessoas profissionais envolvidos na gestão de clubes esportivos (amostra ˝experimental˝) e 164 indivíduos (amostra de ˝controle˝). O resultado de análise estrutural mostrou que a amostra experimental baseou sua visão no pessoal como um fator determinante do sistema, fornecendo a criatividade como uma característica da cultura organizacional do clube. Sub-amostra de controle dos entrevistados poderia indicar algumas características variáveis para predizer o futuro dos clubes, mas não posso dizer que um sistema de previsão é baseado numa longa seqüência de raciocínio. Podemos concluir que as mencionadas duas sub-amostras são diferentes em termos de capacidade de predizer o futuro de seus clubes na base de avaliação das variáveis principais que formam os futuros cenários.

La crisis actual en el deporte en Serbia, justifica la predicción del verdadero potencial de las organizaciones deportivas. La muestra de entrevistados (N=277) fue dividida en dos grupos: 113 profesionales que desarrollan su labor en clubes deportivos (grupo experimental) y 164 individuos (grupo control). Los resultados del análisis estructural mostraron que el grupo experimental basó su visión en el personal como un factor determinante para el sistema, que genera creatividad como una característica de la cultura organizativa del club. El grupo control de entrevistados, podrían indicar algunas variables específicas para predecir el futuro de los clubes, pero sin llegar a proporcionar sistemas claros de predicción basados en una secuencia larga de razonamiento. Podemos concluir que los dos grupos mencionados difieren en su habilidad para orientar las predicciones de futuro de sus clubes, basándose en la evaluación de las variables clave que dan forma a los escenarios futuros.

Application of a more advanced procedure in defining morphological types / Aplicación de un procedimiento más avanzado en la definición de tipos morfológicos

It is well known that the most evident differences in humans are those related to anthropometric characteristics, and that during continuous monitoring the relation between human behavior and human abilities concerning their anthropometric characteristics was observed. The aim of this study was to detect and define the morphological types with the use of slightly different and more advanced methodologies. The sample included 149 male subjects, first-year students of the Faculty of Sport and Physical Education in Novi Sad, using an anthropometric measurement technique. A total of 12 anthropometric measures, defined according to the four-dimensional morphological model was used. For all variables, basic descriptive statistics were calculated while student grouping was performed using taxonomic neural network ­ Intruder. Initial taxonomic classification of artificial entities by neural network Intruder accepted four clusters: endomorph or pyknic, ectomorph or leptosomic, astenomorph and gracile type. The results indicate that the identification and definition of morphological types with the use of a slightly different and more advanced procedure leads to better and earlier perception of certain characteristics which are necessary, both for the selection of specific sports, and in the prevention of various diseases and abnormalities in behavior and functioning.

Es bien sabido que las diferencias más evidentes en los seres humanos son aquellas relacionadas con las características antropométricas, lo cual fue observado durante el monitoreo continuo de la relación entre el comportamiento humano y las capacidades humanas. El objetivo de este estudio fue detectar y definir los tipos morfológicos con el uso de metodologías diferentes y más avanzadas. La muestra incluyó 149 sujetos hombres, estudiantes de primer año de la Facultad de Educación Física y Deportiva en Novi Sad, utilizando una técnica de medición antropométrica. Utilizamos un total de 12 medidas antropométricas, que se definieron de acuerdo con el modelo morfológico de cuatro dimensiones. Para todas las variables se calcularon los estadísticos descriptivos básicos, mientras que la agrupación estudiantil se realizó a través de red neuronal - Intruder. Para la clasificación taxonómica inicial de entidades artificiales por red neuronal Intruder se aceptaron cuatro grupos: endomorfo o pícnico, ectomorfo o leptosomo, astenomorfo y tipo grácil. Los resultados indican que la identificación y definición de los tipos morfológicos con el uso de un procedimiento algo diferente y más avanzado conduce a una mejor percepción de ciertas características que son necesarias, tanto para la selección de deportes específicos, como para la prevención de diversas enfermedades y alteraciones en el comportamiento y funcionamiento.

Comparative study of anthropometric measurement and body composition between elite soccer and basketball players / Estudio comparativo de las medidas antropométricas y composición corporal entre futbolistas de elite y jugadores de básquetbol

The purpose of this study was to describe anthropometric characteristics and body composition of elite soccer and basketball players as well as to make comparisons between them. Seventy-one males were enrolled in the study, divided into three groups: twenty-six soccer players, fourteen basketball players and thirty-one healthy sedentary subjects. All subjects were assessed for the anthropometric measures required for the calculation of body composition variables, using the standardized procedures recommended by established literature. Data was analyzed using SPSS and the descriptive statistics were expressed as a mean (SD) for each variable, while the ANOVA and LSD Post Hoc tests were carried out to detect the effects of each type of sport. The results showed there was no significant difference in body mass index among the groups, while a significant difference was found for body height and body weight as well as for all three of the body contents measured (muscle, bone and fat) among the groups. Basketball players were significantly taller and heavier than soccer players and the subjects of the control group, while there was also a significant difference between the weight of soccer players and the subjects of the control group, who were significantly heavier. The muscle and bone contents in the bodies of the subjects in the control group were significantly lower than that of all other subjects while there was no difference between soccer and basketball players. Lastly, the fat content in the body of the subjects in the control group was significantly higher than that of all of the other subjects, while there was no difference between soccer and basketball players...

El propósito de este estudio fue describir las características antropométricas y de composición corporal de los jugadores de fútbol y básquetbol de élite, así como hacer comparaciones entre ellos. Setenta y un hombres fueron incluidos en el estudio, divididos en tres grupos: 26 jugadores de fútbol, 14 jugadores de básquetbol y 31 sujetos sedentarios sanos. Todos los sujetos fueron evaluados para obtener las medidas antropométricas requeridas para el cálculo de las variables de composición corporal, utilizando los procedimientos normalizados recomendados. Los datos fueron analizados mediante el programa SPSS y los datos estadísticos descriptivos se expresaron como media (desviación estándar) para cada variable. Además se utilizaron las pruebas de ANOVA y LSD que se llevaron a cabo para detectar los efectos de cada tipo de deporte. Los resultados mostraron que no existía diferencia significativa en el índice de masa corporal entre los grupos, mientras que se encontró una diferencia estadísticamente significativa para la altura del cuerpo y el peso corporal, así como para las tres variables medidas del cuerpo (músculo, hueso y grasa) entre los grupos. Los jugadores de básquetbol fueron significativamente más altos y pesados que los jugadores de fútbol y los sujetos del grupo de control, mientras que también hubo una diferencia significativa entre el peso de los jugadores de fútbol y los sujetos del grupo de control, que fueron significativamente más pesados. El contenido muscular y óseo de los sujetos en el grupo control fue significativamente menor, mientras que no hubo diferencias entre los jugadores de fútbol y baloncesto. Por último, el contenido de grasa en el cuerpo de los sujetos en el grupo de control fue significativamente mayor que la de los otros sujetos, mientras que no hubo diferencia entre los jugadores de fútbol y de básquetbol...