scholarly journals Young Athletes Upper Knee Muscular Strength Isokinetic Testing / Izokinetičko testiranje snage natkolene muskulature mladih sportista

2019 ◽  
Vol 17 (1) ◽  
Author(s):  
Branko Đukić ◽  
Mane Mirković ◽  
Snežana Vujanović ◽  
Branislav Strajnić
Keyword(s):  
Sports Medicine ◽  
Muscular Strength ◽  
Football Players ◽  
Isokinetic Dynamometer ◽  
Young Athletes ◽  
Maximum Torque ◽  
Isokinetic Testing ◽  
Torque Moment ◽  
Judo Athletes ◽  
Novi Sad

This research main goal is to determine differences in maximum upper knee musculature torque moment of judo, football and handball players. For the needs of the research, 30 respondents were tested, of which 10 were football, 10 handball players and 10 judo athletes. Testing was conducted in Isokinetic Diagnostic Cabinet of the Provincial Institute for Sports and Sports Medicine in Novi Sad on the isokinetic dynamometer “Easytech prima DOC”. Significant differences were noted in the maximum torque moment of both legs extensors force (PTQR, PTQL) between judo athletes and football players, in favor of judo. Obtained results between observed groups can be attributed to the various sports branches training processes specificities, i.e. performing certain techniques in the sport itself

Improving the design of an internal combustion engine with counter pistons

2021 ◽  
pp. 3-6
Author(s):  
Keyword(s):  
Internal Combustion Engine ◽  
Dynamic Characteristics ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Maximum Torque ◽  
Moment Vector ◽  
Engine Design ◽  
Torque Moment ◽  
Dimensional Parameters ◽  
Crank Mechanism

A new layout of a two-cylinder internal combustion engine with counter-pistons is proposed, which increases its efficiency by reducing the pressure angles. The dynamics of the proposed arrangement of a two-shaft crank-slider internal combustion engine, which provides maximum torque moment at maximum gas pressure in the minimum volume of the combustion chamber, is investigated, which reduces the load on the engine design and its weight and dimensional parameters. The research was carried out by comparing the dynamic characteristics of different engines using vector modular models and the KDAM program. Keywords: internal combustion engine, crank mechanism, indicator diagram, dynamic characteristics, torque moment, vector, contour, model, module [email protected]

scholarly journals Portuguese Football Federation consensus statement 2020: nutrition and performance in football

2021 ◽  
Vol 7 (3) ◽  
pp. e001082
Author(s):  
Rodrigo Abreu ◽  
Pedro Figueiredo ◽  
Paulo Beckert ◽  
José P Marques ◽  
Samuel Amorim ◽  
...  
Keyword(s):  
Sports Medicine ◽  
Scientific Evidence ◽  
Soccer Players ◽  
Football Players ◽  
Sports Science ◽  
Physiological Demands ◽  
And Performance ◽  
Nutritional Strategies ◽  
Practical Constraints ◽  
Practical Recommendations

Nutrition is an undeniable part of promoting health and performance among football (soccer) players. Nevertheless, nutritional strategies adopted in elite football can vary significantly depending on culture, habit and practical constraints and might not always be supported by scientific evidence. Therefore, a group of 28 Portuguese experts on sports nutrition, sports science and sports medicine sought to discuss current practices in the elite football landscape and review the existing evidence on nutritional strategies to be applied when supporting football players. Starting from understanding football’s physical and physiological demands, five different moments were identified: preparing to play, match-day, recovery after matches, between matches and during injury or rehabilitation periods. When applicable, specificities of nutritional support to young athletes and female players were also addressed. The result is a set of practical recommendations that gathered consensus among involved experts, highlighting carbohydrates periodisation, hydration and conscious use of dietary supplements.

scholarly journals The Assessment of Airway Maneuvers and Interventions in University Canadian Football, Ice Hockey, and Soccer Players

2011 ◽  
Vol 46 (2) ◽  
pp. 117-125 ◽  
Author(s):  
J. Scott Delaney ◽  
Ammar Al-Kashmiri ◽  
Penny-Jane Baylis ◽  
Tracy Troutman ◽  
Mahmood Aljufaili ◽  
...  
Keyword(s):  
Sports Medicine ◽  
Rating Scale ◽  
Ice Hockey ◽  
Soccer Players ◽  
Football Players ◽  
Protective Equipment ◽  
Point Rating Scale ◽  
Varsity Athletes ◽  
Ventilation Technique ◽  
Difficult Ventilation

Abstract Context: Managing an airway in an unconscious athlete is a lifesaving skill that may be made more difficult by the recent changes in protective equipment. Different airway maneuvers and techniques may be required to help ventilate an unconscious athlete who is wearing full protective equipment. Objective: To assess the effectiveness of different airway maneuvers with football, ice hockey, and soccer players wearing full protective equipment. Design: Crossover study. Setting: University sports medicine clinic. Patients or Other Participants: A total of 146 university varsity athletes, consisting of 62 football, 45 ice hockey, and 39 soccer players. Intervention(s): Athletes were assessed for different airway and physical characteristics. Three investigators then evaluated the effectiveness of different bag-valve-mask (BVM) ventilation techniques in supine athletes who were wearing protective equipment while inline cervical spine immobilization was maintained. Main Outcome Measure(s): The effectiveness of 1-person BVM ventilation (1-BVM), 2-person BVM ventilation (2-BVM), and inline immobilization and ventilation (IIV) was judged by each investigator for each athlete using a 4-point rating scale. Results: All forms of ventilation were least difficult in soccer players and most difficult in football players. When compared with 1-BVM, both 2-BVM and IIV were deemed more effective by all investigators for all athletes. Interference from the helmet and stabilizer were common reasons for difficult ventilation in football and ice hockey players. Conclusions: Sports medicine professionals should practice and be comfortable with different ventilation techniques for athletes wearing full equipment. The use of a new ventilation technique, termed inline immobilization and ventilation, may be beneficial, especially when the number of responders is limited.

Pediatric Collections: Sports Medicine Playbook

2021 ◽  
Author(s):  
Keyword(s):  
Physical Activity ◽  
Sports Medicine ◽  
Young Athletes ◽  
Treatment And Prevention ◽  
Pediatric Providers

The Pediatric Collections: Sports Medicine Playbook will increase pediatric providers’ understanding of the injuries that young athletes may incur – including their history, treatment, and prevention. Each section includes a unique expert introduction and they cover such topics as the benefits of physical activity, injuries, and concerns including concussions. Available for purchase at https://shop.aap.org/pediatric-collections-sports-medicine-playbook-paperback/

scholarly journals Validation of the Spanish version of multidimensional inventory of perfectionism in young athletes

2019 ◽  
Vol 20 (1) ◽  
pp. 118-129 ◽  
Author(s):  
Francisco Atienza ◽  
Paul Appleton ◽  
Howard K. Hall ◽  
Isabel Castillo Fernández ◽  
Isabel Balaguer Solá
Keyword(s):  
Convergent Validity ◽  
Spanish Version ◽  
Football Players ◽  
Fit Indices ◽  
Young Athletes ◽  
Internal Reliability ◽  
Confirmatory Factor Analyses ◽  
Confirmatory Factor ◽  
Self Worth ◽  
Multidimensional Models

El Inventario Multidimensional de Perfeccionismo en Deporte (MIPS) es una medida deportiva específica del perfeccionismo desarrollado a partir de una combinación de diferentes modelos multidimensionales. Este estudio analiza las propiedades psicométricas del MIPS en una muestra de adolescentes deportistas. Participaron 429 futbolistas españoles con edades comprendidas entre 9 y 13 años. Los análisis factoriales confirmatorios mostraron que un modelo bidimensional obtenía adecuados índices de ajuste y los coeficientes alfa de Cronbach mostraron niveles de fiabilidad interna aceptables. La validez criterial y convergente del MIPS español ha sido confirmada analizando su asociación con medidas de ansiedad competitiva, auto-estima contingente y con otras dimensiones de perfeccionismo. Los resultados de este estudio sugieren que la versión española del MIPS es un instrumento específico para deporte, bien adaptado, fiable y válido para su utilización con jóvenes deportistas. The Multidimensional Inventory of Perfectionism in Sport (MIPS) is one sport specific measure of perfectionism developed on the basis of a combination of different multidimensional models. This study assesses the psychometrics of the MIPS-Y in a Spanish adolescent sport sample. Participants were 429 Spanish football players with ages ranging from 9 to 13 years. Confirmatory factor analyses showed that a two-dimensional model obtained adequate fit indices and Cronbach’s alpha coefficients showed acceptable levels of internal reliability. The criterion and convergent validity of the Spanish MIPS was also confirmed via its association with measures of sport anxiety, contingent self-worth and additional perfectionism dimensions. The results of this study suggest that the Spanish version of the MIPS is a well-adapted, reliable and valid sport specific instrument for employment with young athletes. O Perfeccionismo Multidimensional em Inventário Desportivo (MIPS) é uma medida específica de perfeccionismo desenvolvida a partir de uma combinação de diferentes modelos multidimensionais. Este estudo analisa as propriedades psicométricas da MIPS em uma amostra de atletas adolescentes. Havia 429 futebolistas espanhóis entre os 9 e os 13 anos. As análises fatoriais confirmatórias mostraram que um modelo bidimensional obteve índices de ajuste adequados e os coeficientes alfa de Cronbach mostraram níveis aceitáveis de confiabilidade interna. A validade convergente e criterial da MIPS espanhola foi confirmada pela análise da sua associação com medidas de ansiedade competitiva, auto-estima contingente e outras dimensões do perfeccionismo. Os resultados deste estudo sugerem que a versão espanhola da MIPS é um instrumento específico do esporte, bem adaptado, confiável e válido para uso com jovens atletas.

scholarly journals Exertional Heat Illness in American Football Players: When Is the Risk Greatest?

2016 ◽  
Vol 51 (8) ◽  
pp. 593-600 ◽  
Author(s):  
Earl R. Cooper ◽  
Michael S. Ferrara ◽  
Douglas J. Casa ◽  
John W. Powell ◽  
Steven P. Broglio ◽  
...  
Keyword(s):  
Incidence Rate ◽  
Sports Medicine ◽  
National Collegiate Athletic Association ◽  
The United States ◽  
American Football ◽  
Football Players ◽  
Heat Illness ◽  
Wet Bulb Globe Temperature ◽  
Exertional Heat Illness ◽  
Globe Temperature

Context: Knowledge about the specific environmental and practice risks to participants in American intercollegiate football during preseason practices is limited. Identifying risks may mitigate occurrences of exertional heat illness (EHI). Objective: To evaluate the associations among preseason practice day, session number, and wet bulb globe temperature (WBGT) and the incidence of EHI. Design: Descriptive epidemiology study. Setting: Sixty colleges and universities representing 5 geographic regions of the United States. Patients or Other Participants: National Collegiate Athletic Association football players. Main Outcome Measure(s): Data related to preseason practice day, session number, and WBGT. We measured WBGT every 15 minutes during the practice sessions and used the mean WBGT from each session in the analysis. We recorded the incidence of EHIs and calculated the athlete-exposures (AEs). Results: A total of 553 EHI cases and 365 810 AEs were reported for an overall EHI rate of 1.52/1000 AEs (95% confidence interval [CI] = 1.42, 1.68). Approximately 74% (n = 407) of the reported EHI cases were exertional heat cramps (incidence rate = 1.14/1000 AEs; 95% CI = 1.03, 1.25), and about 26% (n = 146) were a combination of exertional heat syncope and heat exhaustion (incidence rate = 0.40/1000 AEs; 95% CI = 0.35, 0.48). The highest rate of EHI occurred during the first 14 days of the preseason period, and the greatest risk was during the first 7 days. The risk of EHI increased substantially when the WBGT was 82.0°F (27.8°C) or greater. Conclusions: We found an increased rate of EHI during the first 14 days of practice, especially during the first 7 days. When the WBGT was greater than 82.0°F (27.8°C), the rate of EHI increased. Sports medicine personnel should take all necessary preventive measures to reduce the EHI risk during the first 14 days of practice and when the environmental conditions are greater than 82.0°F (27.8°C) WBGT.

Working with Young Athletes: Views of a Nutritionist on the Sports Medicine Team

1996 ◽  
Vol 6 (2) ◽  
pp. 110-120 ◽  
Author(s):  
Dan Benardot
Keyword(s):  
Nutritional Status ◽  
Health Risks ◽  
Athletic Performance ◽  
Sports Medicine ◽  
Health Problems ◽  
Young Athletes ◽  
Governing Body ◽  
Medicine Team

Athletes are influenced by coaches, other athletes, media, parents, the national sport governing body, members of the sports medicine team, and the athlete's own desire for success. It is impossible, therefore, for one member of the sports medicine team to unilaterally determine workable solutions that enhance performance and diminish health problems in an athlete. A focus on ensuring that the athlete can perform to the best of her ability is a key to encouraging discussion between the nutritionist, athlete, and coach. Using the assumption that health and top athletic performance are compatible, this focus on performance provides a discussion point that all parties can agree to and, if approached properly, also fulfills the nutritionist's goal of achieving optimal nutritional status. Membership on the sports medicine team mandates that the nutritionist know the paradigms and health risks associated with the sport and develop assessment and feedback procedures specific to the athlete's needs.

scholarly journals RELEVANCE OF THE INTRODUCTION OF FITNESS-AEROBICS IN THE TRAINING PROCESS OF YOUNG FOOTBALL PLAYERS

2021 ◽  
Author(s):  
K.A. Kirillova ◽  
◽  
A.Y. Pashchenko ◽  
M.G. Zhalbe ◽  
L.A. Volkov
Keyword(s):  
Motor Activity ◽  
Football Players ◽  
Training Process ◽  
Young Athletes ◽  
Harmonious Development ◽  
Moral Qualities ◽  
Motor Actions

The direction of fitness aerobics contributes to the harmonious development of the child, the improvement of physical, intellectual, mental, as well as spiritual and moral qualities. When training movements, young players acquire the knowledge necessary for their conscious motor activity, gain experience in their implementation, including creative. In the process of learning motor actions in young athletes developed the need to improve their own nature, they create the prerequisites for the implementation of their own individuality. Mastering a variety of fitness aerobics complexes, engaged in the opportunity to improve, as well as they have formed a deeper interest and love to practice in the football section.

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