Protein intake by master swimmers: Implications for practice in Sports Nutrition-A cross-sectional study.

Background: Proteins are essential for the maintenance, repair, and growth of muscle mass. This is particularly important for master athletes because aging has been associated with loss of muscle mass, function, and strength. Moreover, the timing of intake has been shown important for the best protein utilization. Aim: To analyze timing, quantity, and source of dietary protein in competitive master athletes according to current recommendations. Methods: Twenty-one male master swimmers (47.9 ± 10.0 years; 79.2 ± 6.5 kg; 179.1 ± 5.5 cm; 23.5 ± 4.9% body fat; 73.3 ± 4.2% lean mass) participated in this cross-sectional study. Protein intake was analyzed based on 7-day food records, regarding quantity, timing, and sources of intake. Protein intake was evaluated according to current international sports nutrition guidelines, including the International Society of Sports Nutrition Position Stand. Body fat (%) and lean mass (%) were evaluated using dual-energy X-ray absorptiometry. Results: Participants' mean protein intakes were 1.9 ± 0.5 g/kg/day, 0.6 ± 0.2 g/kg/meal post-training, and 33.5 ± 23.9 g during the pre-sleep period. Daily intake was within the recommended values of 1.4 and 2.0 g/kg/day (p = 0.01 and 0.147, respectively). Mean pre-sleep intake was within the recommendation values of 30-40 g (p = 0.28 and 0.147, respectively). Most of the daily protein intake was consumed at lunch (66.7 ± 6.9 g) and dinner (48.0 ± 4.5 g). Regarding protein sources, intakes from animal, vegetal, and supplements were, respectively, 65.7%, 29.2%, and 5.1%. Conclusion: Master swimmers presented a total protein intake within the recommendations for a daily basis, but the majority of intake was at lunch and dinner. Protein intake could be better distributed throughout the day to optimize protein synthesis. Guidance on daily protein intake distribution should be reinforced in clinical practice.

Tarsal Coalition: Surgical Management in the Young Athlete.

Tarsal coalition is an abnormal bony, cartilaginous, or fibrous bridge between 2 or more tarsal bones. Adolescent athletes with tarsal coalitions typically present with symptoms that include foot and/or ankle pain and limited range of motion. Loss of mobility can lead to abnormal loading, articular instability, deformity, and joint degeneration. Nonoperative management includes immobilization, physical therapy, and custom foot orthosis. Surgical options include coalition excision and fat graft interposition, foot realignment, or a combination of these. Surgical treatment requires evaluation of the coalition type, foot alignment, and degenerative changes in the adjacent joints.

Engagement in Youth Athletes as a Positive Experience in Sport: Implications of Gender, Age, and Competitive Level.

The aim of this study was to examine athlete engagement and its relationships with indicators of the quality of the athlete's sport experience, exploring potential differences according to gender, age, and competitive level. Furthermore, this study validated the Athlete Engagement Questionnaire (AEQ) in young athletes and confirmed its factor structure. A total of 1188 athletes (43.90% girls) from Argentina participated in the study, with a mean age of 15.92 (SD = 2.50). The participants completed the AEQ along with other measures of athletes' quality of experience, such as motivation, enjoyment, and burnout. This study confirmed the multidimensional nature of engagement, showing positive associations with high-quality athlete experiences and revalidating the inverse relationship with burnout. Moreover, the study found differences in engagement dimensions (i.e., confidence, vigor, dedication, and enthusiasm) based on the interplay of gender, age, and competitive level. In general, male athletes, younger athletes, and those with a higher competitive level showed more engagement and interactions between these sociodemographic variables. The Argentinian version of AEQ exhibited optimal fit and reliability and good indexes of measurement invariance across gender, age, and competitive level. These findings validate the AEQ as a reliable tool for evaluating sport engagement among adolescents in Argentina. Engagement constitutes an indicator of an optimal experience linked to positive youth development through sports participation.

Gender Differences in Physical Performance and Psychological Assessment Among Cuban National Athletics Team / Diferencias de género en el rendimiento físico y la evaluación psicológica en el equipo nacional de atletismo cubano / Diferenças de gênero no desempenho físico e avaliação psicológica entre a equipe nacional de atletismo de Cuba

Abstract Introduction: Elite sports pose potential health risks, but are vital to the well-being of society. In Cuban society, sport is an integral part of personal development and public health, fostering unity and promoting female participation for sustainable growth. Athletics is one of the most important sports in Cuban sport, and should be approached both from the point of view of sports training and sports psychology. Purpose: The aim of this study was to provide a description of conditional variables in a countermovement jump (CMJ), mood profile, self-efficacy, and the leg-hip height index among athletes from the Cuban national athletics pre-selection team, differentiated by gender. Methods: Our sample consisted of the Cuban national athletics pre-selection team. Results: Mood profile analysis using the Profile of Mood States (POMS) did not reveal significant gender differences, with a small effect size for gender. Men showed a slightly greater trend towards vigor compared to women. Significant differences in self-efficacy were observed between men and women in their confidence levels to achieve jump heights between 21 and 40 cm using the CMJ. However, no significant differences were found for jumps exceeding 40 cm, highlighting the importance of strategies to enhance athletes' psychological needs and self-efficacy. Conclusions: This study suggests that the association between tension-related anxiety and performance indicators related to jump height may play a crucial role in determining specific profiles in male and female Cuban athletes. Our comprehensive analysis contributes to understanding gender differences in performance factors. These findings provide valuable insights for future research and athlete development strategies.

Resumen Introducción: Los deportes de élite plantean riesgos potenciales para la salud, pero son vitales para el bienestar de la sociedad. En la sociedad cubana, el deporte forma parte integral del desarrollo personal y la salud pública, fomentando la unidad y promoviendo la participación femenina, para un crecimiento sostenible. El atletismo es uno de los deportes más importantes en el deporte cubano, y debe ser abordado tanto, desde el punto de vista del entrenamiento deportivo, como desde la psicología deportiva. Propósito: El objetivo de este estudio fue proporcionar una descripción de las variables condicionales en un salto con contramovimiento (CMJ, por sus siglas en inglés), el perfil anímico, la autoeficacia y el índice de altura pierna-cadera en atletas de la preselección nacional cubana de atletismo, diferenciados por sexo. Materiales y métodos: Nuestra muestra estuvo constituida por la preselección nacional de atletismo de Cuba. Resultados: El análisis del perfil del estado de ánimo mediante el Perfil de Estados de Ánimo (POMS) no reveló diferencias significativas entre sexos, con un tamaño del efecto pequeño para el sexo. Los hombres mostraron una tendencia ligeramente mayor hacia el vigor, en comparación con las mujeres. Se observaron diferencias significativas en la autoeficacia entre hombres y mujeres, en sus niveles de confianza para alcanzar alturas de salto de entre 21 y 40 cm utilizando el CMJ. Sin embargo, no se encontraron diferencias significativas para los saltos superiores a 40 cm, lo que pone de relieve la importancia de las estrategias para mejorar las necesidades psicológicas y la autoeficacia de los atletas. Conclusiones: Este estudio sugiere que, la asociación entre la ansiedad, relacionada con la tensión y los indicadores de rendimiento, vinculados con la altura del salto, pueden desempeñar un papel crucial en la determinación de perfiles específicos, en atletas cubanos, de ambos sexos. Nuestro análisis exhaustivo contribuye a comprender las diferencias de género en los factores de rendimiento. Estos hallazgos proporcionan valiosos conocimientos para futuras investigaciones y estrategias de desarrollo en atletas.

Resumo Introdução: Os desportos de elite apresentam riscos potenciais para a saúde, mas são vitais para o bem-estar da sociedade. Na sociedade cubana, o desporto é parte integrante do desenvolvimento pessoal e da saúde pública, fomentando a unidade e promovendo a participação feminina para um crescimento sustentável. O atletismo é uma das modalidades mais importantes do desporto cubano e deve ser abordado tanto do ponto de vista do treino desportivo como da psicologia desportiva. Objetivo: O objetivo deste estudo foi fornecer uma descrição das variáveis condicionais em um salto com movimento (CMJ, sigla em inglês), perfil de humor, autoeficácia e o índice de altura da perna-quadril entre atletas da equipe de pré-seleção nacional de atletismo de Cuba, diferenciados por gênero. Métodos: Nossa amostra consistiu na equipe de pré-seleção nacional de atletismo de Cuba. Resultados: A análise do perfil de humor usando o Perfil de Estados de Humor (POMS) não revelou diferenças significativas de gênero, com um pequeno efeito de tamanho para o gênero. Os homens mostraram uma tendência ligeiramente maior para o vigor em comparação com as mulheres. Diferenças significativas na autoeficácia foram observadas entre homens e mulheres em seus níveis de confiança para alcançar alturas de salto entre 21 e 40 cm usando o CMJ. No entanto, não foram encontradas diferenças significativas para saltos superiores a 40 cm, destacando a importância de estratégias para aprimorar as necessidades psicológicas e a autoeficácia dos atletas. Conclusões: Este estudo sugere que a associação entre ansiedade relacionada à tensão e indicadores de desempenho relacionados à altura do salto pode desempenhar um papel crucial na determinação de perfis específicos em atletas cubanos do sexo masculino e feminino. Nossa análise abrangente contribui para entender as diferenças de gênero nos fatores de desempenho. Esses achados fornecem insights valiosos para futuras pesquisas e estratégias de desenvolvimento de atletas.

Abnormal uterine bleeding and associated factors: a cross-sectional study in high-performance Peruvian athletes.

Background: Abnormal uterine bleeding (AUB) is a problem that affects women and can cause outcomes such as anaemia, affecting women's quality of life. In high-performance athletes, this problem can be further exacerbated by intense physical activity, strict nutritional regimens and physical stress. Hypothesis: There are factors that increase the risk of occurrence of AUB in high-performance Peruvian athletes. Study design: Cross-sectional study. Level of evidence: Level 4. Methods: We applied an online questionnaire with questions to identify AUB according to the International Federation of Gynecology and Obstetrics criteria, demographic characteristics, sport practised and evaluation of the risk of an eating disorder using the Eating Attitudes Test questionnaire. We used a generalised linear model to identify factors associated with AUB. Results: We evaluated 101 participants whose mean age was 22.3±4.3 years. The body mass index had a mean of 22.6±2.4 kg/m2. From the total of athletes, 68.3% (95% CI 58.6% to 76.7%) presented AUB. The bivariate analysis showed that the type of sport and the duration of the sporting activity were associated (p<0.05) with AUB, with AUB frequencies of 76.5% observed in athletes who practised anaerobic sports. The multivariate analysis did not report factors significantly associated with AUB. Conclusion: We found a high frequency of AUB in high-performance Peruvian athletes, especially in those who practice anaerobic and resistance sports. Clinical relevance: High-performance female athletes health must be evaluated periodically, and immediate actions are taken to control and treat AUB.

Meios tático-técnicos e sistemas defensivos do handebol na categoria sub-14: preferências de ensino por treinadores e reflexões para a formação de jogadores / Tactical-technical aspects and defensive systems in handball for the u-14 teams: teaching preferences of coaches and reflections for player development / Medios táctico-técnicos y sistemas defensivos en balonmano en la categoría sub-14: preferencias de enseñanza de los entrenadores y reflexiones para la formación de jugadores

Meios tático-técnicos e sistemas defensivos no hande-bol constituem-se como conhecimentos específicos da modalida-de que precisam ser organizados e terem seu ensino planejado pelo treinador. Este estudo identificou os conteúdos defensivos e as preferências para seu ensino por treinadores da categoria sub-14. Foram entrevistados 13 treinadores de equipes participantes de campeonatos da Federação Paulista de Handebol, cujos de-poimentos foram analisados pelo método do Discurso do Sujeito Coletivo. Os resultados mostraram preferências dos sistemas de-fensivos (individuais, 3:3 e 5:1), meios tático-técnicos (marcação, flutuação, cobertura e trocas) e pelo ensino por meio de jogos e situações de jogo. Espera-se que os resultados contribuam para ampliar as discussões sobre a temática.

Tactical-technical aspects and defensive systems in han-dball constitute specific knowledge which needs to be organized and planned for teaching by the coach. This study identified defen-sive content and preferences for its teaching among U-14 teams' coaches. Thirteen coaches of teams participating in the cham-pionships of the São Paulo Handball Federation were interviewed, and their statements were analyzed using the Collective Subject Discourse method. The results indicated preferences for defensi-ve systems (man-to-man, 3:3, and 5:1), tactical-technical aspects (marking, floating, coverage, and position exchange), and teaching through games and game situations. It is expected that the results will contribute to expanding discussions on this topic.

Los medios táctico-técnicos y los sistemas defensivos en el balonmano son conocimientos específicos que necesitan ser organizados y planificados para su enseñanza por parte del entre-nador. Este estudio identificó el contenido defensivo y las preferencias de enseñanza de entrenadores en la categoría sub-14. Se entrevistaron a 13 entrenadores de equipos que participan en los campeonatos de la Federación Paulista de Balonmano, cuyos tes-timonios fueron analizados utilizando el método del Discurso del Sujeto Colectivo. Los resultados mostraron preferencias por sis-temas defensivos (individuales, 3:3 y 5:1), medios táctico-técnicos (marcación, flotación, cobertura y cambios) y la enseñanza a través de juegos y situaciones de juego. Se espera que los resultados con-tribuyan a ampliar las discusiones sobre este tema.

DOPING CONTROL IN MALE SOCCER PLAYERS IN BRAZIL: 10 YEARS OF FOLLOW-UP.

Objective: To understand the Adverse Analytical Finding (AAF) that have occurred in Brazilian soccer in a recent 10-year period, comparing them to international data, to know the Brazilian profile. Methods: A review of the AAR in the Doping Control Commission database of the Brazilian Football Association from 2008 to 2017. The AAR in professional male soccer players between 2008 and 2017 were considered. Results: The sample selected in this research was composed of 40,092 doping tests, with 113 AAR, identified in 18 different competitions (0.28%) in the professional category, in Brazilian national and state competitions between 2008 and 2017, flagged in doping control exams through urine samples. Stimulants were detected most frequently (31.0%), followed by glucocorticoids (21.2%), diuretics, and masking agents (19.5%). The Brazilian Championship series did not show a relationship with any of the World Anti-Doping Agency (WADA) groups of substances. Series A showed 0.07% of AAR, Series B 0.21%, Series C 0.75% and Series D 1.49. Conclusion: The rate of AAR in Brazilian soccer was 0.28%, lower than the average for all soccer worldwide, and shows similar percentages among field positions. Stimulants were the most prevalent drugs. The national elite soccer competitions showed significantly fewer cases than the lower divisions. Level of Evidence II; Retrospective Study.

Objetivo: Compreender os Resultados Analíticos Adversos (RAA) ocorridos no futebol brasileiro nos últimos 10 anos, comparando-os aos dados internacionais, para conhecer o perfil do futebol brasileiro. Métodos: Revisão dos RAA no banco de dados da Comissão de Controle de Doping da Confederação Brasileira de Futebol de 2008 a 2017. Foram consideradas os RAA entre 2008 e 2017. Resultados: A amostra selecionada nesta pesquisa foi composta por 40.092 exames antidoping com 113 RAA, os quais foram identificados em 18 competições diferentes (0,28%) em atletas da categoria professional, entre 2008 e 2017, sinalizadas em exames de controle de doping através de amostras de urina. Estimulantes foram detectados com maior frequencia (31%), seguidos de glicocorticoides (21,2%), diuréticos e agentes mascarantes (19,5%). A série do Campeonato Brasileiro não apresentou relação com nenhum dos grupos de substâncias da World Anti-Doping Agency (WADA). A série A apresentou 0,07% da AAR, Série B 0,21%, Série C 0,75% e Série D 1,49%. Conclusão: A taxa de RAA no futebol brasileiro foi de 0,28%, inferior à media do futebol mundial e apresenta percentuais semelhantes entre as posições do campo. Os estimulantes foram as drogas mais prevalentes. As competições nacionais de futebol das Séries superiores apresentaram significativamente menos casos do que as inferiores. Nível de Evidência II; Estudo Retrospectivo.

Effects of dominance and vision on unipedal balance tests in futsal players using a triaxial accelerometer.

Optimal postural control improves performance and reduces the risk of injury in futsal. In this context, wearable accelerometers may detect velocity changes of the centre of mass during a task, enabling the analysis of postural control in different environments. This work aimed to determine the influence of vision and dominance on unipodal static postural balance in non-professional athletes. Twenty-four university male futsal players performed a unipodal balance test to assess their body sway using a triaxial accelerometer. To assess dominance, the preferred limb for kicking the ball was considered, while vision was manipulated by asking participants to close their eyes during the test. Root mean square (RMS) and sample entropy (SaEn) of centre of mass variables were analysed. For statistical analysis, a multivariate analysis of variance model was used. Our results suggest an effect of vision, but not of dominance nor the interaction between vision and limb dominance. Specifically, a higher-acceleration RMS in the mediolateral axis was observed, as well as an increased SaEn in the three axes. To conclude, unipodal postural demand in futsal players under visual input suppression was not influenced by their limb dominancy.

Risk and protective factors for shoulder complaints in indoor volleyball players: A comprehensive systematic review.

OBJECTIVE: This systematic review aimed to answer the question: "What are the risk and protective factors for shoulder complaints (pain, injury, or problem) in indoor volleyball players?". METHODS: Searches were conducted in electronic databases: PubMed/MEDLINE, Embase, CINAHL, and SPORTDiscus, as well as reference lists of the included studies. We included studies evaluating potential intrinsic and extrinsic factors associated with shoulder complaints in indoor volleyball players of any country, age, sex, and competitive level. The Quality in Prognosis Studies (QUIPS) tool was used to assess the risk of bias. RESULTS: The risk factors for shoulder complaints in volleyball players were identified through four prospective studies, which exhibited a moderate to low risk of bias. These factors included previous shoulder pain or injury, playing in outside and opposite positions, subacromial bursa thickening, and having an average external rotator (ER) isokinetic eccentric torque lower than the average internal rotator (IR) concentric torque. Protective factors were enhancing shoulder IR and ER isokinetic eccentric strength, being male sex, being older, and maintaining a concentric strength ratio ER/IR within the 0.60-0.75 range. CONCLUSIONS: This systematic review highlights risk factors that clinicians and researchers should consider when assessing and tracking indoor volleyball players.

Doping control in male soccer players in brazil: 10 years of follow-up / Controle de doping no futebol masculino no brasil: 10 anos de acompanhamento

ABSTRACT Objective: To understand the Adverse Analytical Finding (AAF) that have occurred in Brazilian soccer in a recent 10-year period, comparing them to international data, to know the Brazilian profile. Methods: A review of the AAR in the Doping Control Commission database of the Brazilian Football Association from 2008 to 2017. The AAR in professional male soccer players between 2008 and 2017 were considered. Results: The sample selected in this research was composed of 40,092 doping tests, with 113 AAR, identified in 18 different competitions (0.28%) in the professional category, in Brazilian national and state competitions between 2008 and 2017, flagged in doping control exams through urine samples. Stimulants were detected most frequently (31.0%), followed by glucocorticoids (21.2%), diuretics, and masking agents (19.5%). The Brazilian Championship series did not show a relationship with any of the World Anti-Doping Agency (WADA) groups of substances. Series A showed 0.07% of AAR, Series B 0.21%, Series C 0.75% and Series D 1.49. Conclusion: The rate of AAR in Brazilian soccer was 0.28%, lower than the average for all soccer worldwide, and shows similar percentages among field positions. Stimulants were the most prevalent drugs. The national elite soccer competitions showed significantly fewer cases than the lower divisions. Level of Evidence II; Retrospective Study.

RESUMO Objetivo: Compreender os Resultados Analíticos Adversos (RAA) ocorridos no futebol brasileiro nos últimos 10 anos, comparando-os aos dados internacionais, para conhecer o perfil do futebol brasileiro. Métodos: Revisão dos RAA no banco de dados da Comissão de Controle de Doping da Confederação Brasileira de Futebol de 2008 a 2017. Foram consideradas os RAA entre 2008 e 2017. Resultados: A amostra selecionada nesta pesquisa foi composta por 40.092 exames antidoping com 113 RAA, os quais foram identificados em 18 competições diferentes (0,28%) em atletas da categoria professional, entre 2008 e 2017, sinalizadas em exames de controle de doping através de amostras de urina. Estimulantes foram detectados com maior frequencia (31%), seguidos de glicocorticoides (21,2%), diuréticos e agentes mascarantes (19,5%). A série do Campeonato Brasileiro não apresentou relação com nenhum dos grupos de substâncias da World Anti-Doping Agency (WADA). A série A apresentou 0,07% da AAR, Série B 0,21%, Série C 0,75% e Série D 1,49%. Conclusão: A taxa de RAA no futebol brasileiro foi de 0,28%, inferior à media do futebol mundial e apresenta percentuais semelhantes entre as posições do campo. Os estimulantes foram as drogas mais prevalentes. As competições nacionais de futebol das Séries superiores apresentaram significativamente menos casos do que as inferiores. Nível de Evidência II; Estudo Retrospectivo.

Cardiac Changes after Lactate-Guided Conditioning in Young Purebred Arabian Horses.

Cardiac adaptation to conditioning in horses was evaluated after empirical training based on trainers' experience. Twelve purebred Arabian horses, aged (mean ± SD) 28.42 ± 3.75 months, which did not perform any type of exercise prior to the research, were submitted to treadmill conditioning for six weeks. The conditioning program was based on the velocity run by the horse at which the blood lactate concentration, determined in an incremental exercise test (IET), reached 2 mmol/L (V2). The velocity at which the blood lactate concentration reached 4 mmol/L (V4) was also determined. The echocardiograms were performed at rest with pulsed-wave and tissue Doppler imaging in B- and M-modes. All procedures were carried out before and after the conditioning period. The results showed increases in V2 (from 5.2 ± 0.3 to 6.7 ± 0.4 m/s) and V4 (from 5.8 ± 0.4 to 7.6 ± 0.5 m/s) (p < 0.0001). There were also increases in the left ventricle internal diameter at diastole (LVIDd), left ventricle mass (LV mass), and stroke volume (SV), while no changes were observed in the LV free wall thickness and mean and relative wall thicknesses. The conditioning protocol, which was completed by all horses, proved to be safe and efficient, as it improved the aerobic capacity of the animals. Finally, the cardiac remodeling that occurred was mainly associated with the effect of physical training.

Effects of Resistance Training of Upper Limb and Trunk Muscles on Soccer Instep Kick Kinematics.

The upper body and trunk muscles are crucial to perform soccer kicks. Resistance training targeting these muscles may modify the pattern adopted during kicking. This study aimed to investigate the effect of resistance training of the arm and anterior trunk muscles on instep kicking kinematics. Twenty-six male participants were randomly allocated into a training group or control group. The training group underwent resistance training of arm and trunk muscles and practiced the instep kick for 8 weeks. The control group only practiced kicking during the same period. The trunk, hip, and knee kinematics were assessed during the instep kick before and after the intervention. Kinematics were analyzed according to their data distribution with statistical parametric or nonparametric mapping. The effect of the training on the 1-repetition maximum test was analyzed using a repeated-measures multivariate analysis of variance. The training group showed greater hip extension after the training during the backswing phase (Hedge g effect size of 0.316-0.321) and increased 1-repetition maximum for all exercises. There were no other differences. The present study documented the nonlocal effect of strengthening training in which arm and trunk muscle training resulted in changes in hip kinematics during the backswing phase of the instep kick.

Current Technologies and Practices to Assess External Training Load in Paralympic Sport: A Systematic Review.

CONTEXT: Knowing the methods to assess the external load in Paralympic sports can help multidisciplinary teams rely on scientific evidence to better prescribe and monitor the athlete's development, improving sports performance and reducing the risk of injury/illness of Paralympic athletes. OBJECTIVES: This review aimed to systematically explore the current practices of quantifying the external load in Paralympic sports and provide an overview of the methods and techniques used. EVIDENCE ACQUISITION: A search in PubMed, Web of Science, Scopus, and EBSCO was carried out until November 2022. The measures of interest were objective methods for quantifying the external load of training or competition. The inclusion criteria for the studies were as follows: (1) peer-reviewed article; (2) the population were Paralympic athletes; (3) evaluated during training or competition; (4) reported at least one external load measure; and (5) published in English, Portuguese, or Spanish. EVIDENCE SYNTHESIS: Of the 1961 articles found, 22 were included because they met the criteria, and 8 methods were identified to quantify the external load in training or competition in 8 Paralympic sports. The methods varied according to the characteristics of the Paralympic sports. To date, the devices used included an internal radiofrequency-based tracking system (wheelchair rugby) a miniaturized data logger (wheelchair tennis, basketball, and rugby); a linear position transducer (powerlifting and wheelchair basketball); a camera (swimming, goalball, and wheelchair rugby); a global positioning system (wheelchair tennis); heart rate monitors that assess external load variables in set (paracycling and swimming) and an electronic timer (swimming). CONCLUSIONS: Different objective methods were identified to assess the external load in Paralympic sports. However, few studies showed the validity and reliability of these methods. Further studies are needed to compare different methods of external load quantification in other Paralympic sports.

Kinematic and kinetic comparison between preprofessional pitchers from the Dominican Republic and the United States.

Introduction: Pitching biomechanical efficiency is defined as the association between pitch velocity and arm kinetics. Pitching mechanics inefficiency, an increase in arm kinetics without the resultant increase in pitch velocity, can lead to increased arm strain, increasing arm injury risk. The purpose of this study was to compare arm kinetics, elbow varus torque and shoulder force, in preprofessional United States (US) and Dominican Republic (DR) pitchers. Kinematics that are known to influence elbow varus torque and shoulder force as well as a representative of pitch velocity (hand velocity) were also compared. Methods: A retrospective review was performed on baseball pitchers from the DR and US who participated in biomechanical evaluations conducted by the University biomechanics laboratory personnel. Three-dimensional biomechanical analyses were performed on US (n = 37) and DR (n = 37) baseball pitchers. Potential differences between US and DR pitchers were assessed through analysis of covariance with 95% confidence intervals [95% confidence Interval (CI)]. Results: Preprofessional DR pitchers experienced increased elbow varus torque compared with their US counterparts [DR: 7.5 (1.1); US: 5.9 (1.1) %BWxH; Beta: -2.0 (95% CI: -2.7, -1.2) %BWxH], despite throwing fastballs with slower hand velocity [DR: 3,967.1 (939.4); US: 5,109.1 (613.8) °/s; Beta: 1,129.5 (95% CI: 677.5, 1,581.4) °/s]. DR and US pitchers demonstrated similar shoulder force [DR: 136.8 (23.8); US: 155.0 (25.7); Beta: 0.4 (95% CI: -1.2, 19.7) %BW]. Discussion: Increased elbow varus torque although decreased hand velocity suggests inefficient pitching mechanics among DR pitchers. Inefficient pitching mechanics and increased elbow torque should be considered when developing training programs and pitching plans for professional pitchers from the Dominican Republic.

Does Relative Age Effect Exist in Paralympic Sport? A Study With Brazilian Paralympic Swimmers.

A Relative Age Effect (RAE), by which young athletes with birthdates early in a calendar year have experienced a team selection advantage that persists throughout their careers, has been found to be prevalent in many sports. However, this phenomenon has not been investigated in the Paralympic sports context. Thus, we aimed to investigate the prevalence of RAE among male and female Brazilian Paralympic swimmers. Data from 694 ranked athletes were collected from the 2021 Brazilian Paralympic Swimmers National rankings. Athletes' birthdates were divided into four quarters (Q1, Q2, Q3, and Q4) according to their month of birth. Chi-Square (χ2) goodness-of-fit tests were used to compare the observed and expected distributions of athletes born in each quarter, based on sex (male and female), impairment type (physical, visual, and intellectual), and swim stroke competition (freestyle, medley, backstroke, butterfly, and breaststroke). The observed birthdates distributions were different from expected in males (χ2 = 11.647; p = 0.009) and females (χ2 = 8.899; p = 0.031), for athletes with physical impairments (χ2 = 10.443; p = 0.015); and for athletes who competed in freestyle (χ2 = 16.683; p = 0.001), medley (χ2 = 12.343; p = 0.006) and backstroke (χ2 = 8.025; p = 0.045) races. Even though our results demonstrated asymmetric distributions of Brazilian Paralympic swimmers' birthdates in many of the analyses, we could not establish the classical prevalence of athletes born at the beginning of the year that defines RAE. Therefore, the selection process of Brazilian Paralympic swimmers does not seem to be influenced by the athletes' time of birth.

Como eu faço no Coração de Atleta: avaliação dos diferentes tipos de adaptação ao exercício / My approach to "Athlete'S Heart": evaluation of the different types of adaptation to exercise

A prática regular de esportes pode induzir adaptações no coração, sendo essa condição comumente chamada de "coração de atleta". As alterações observadas incluem dilatação das câmaras cardíacas, aumento da espessura miocárdica, melhora do enchimento ventricular, aumento da trabeculação do ventrículo esquerdo (VE), dilatação da veia cava inferior, entre outras. Essas alterações também podem ser observadas em algumas doenças cardíacas, como cardiomiopatia (CMP) dilatada, hipertrófica e outras. Dessa forma, os exames de imagem cardíaca são fundamentais na identificação dessas alterações e na diferenciação entre o "coração de atleta" e uma possível cardiopatia.(AU)

Exercise-induced adaptation may occur in amateur and professional athletes. This condition is commonly named "athlete's heart". The alterations observed include dilation of the heart chambers, increased myocardial thickness, improved ventricular filling, increased left ventricular trabeculation, dilation of the inferior vena cava, among others. These changes can also be observed in some heart diseases, such as dilated, hypertrophic and other cardiomyopathies (CMP). Thus, cardiac imaging tests are fundamental in identifying these alterations and in differentiating between "athlete's heart" and possible heart disease. (AU)

Association of trunk and lower limb factors with shoulder complaints and sport performance in overhead athletes: A systematic review including GRADE recommendations and meta-analysis.

OBJECTIVE: To identify the association of trunk and lower limb factors with shoulder complaints and sport performance in overhead athletes. METHODS: Search performed at PubMed/Medline, Embase, CINAHL, LILACS, Cochrane, Web of Science and SPORTDiscus for observational studies. Methodological quality and strength of the evidence was assessed with the Newcastle-Ottawa Scale and GRADE. Meta-analysis and effects sizes analysis were calculated when possible. RESULTS: Sixty-five studies were included. Low to very-low evidence suggests no association of trunk/lower limb strength, endurance, power, jump or balance with shoulder complaints and/or throwing performance. Athletes with shoulder complaints performed worse in trunk stability and endurance tests (mean difference: -6.83 (95%CI: -8.78, -4.88)). Athletes with high throwing performance presented better results in CMJ, horizontal jump, power measures and knee extension strength. For swimmers, there was no association of trunk/lower limb endurance with shoulder complaints (moderate evidence) and no association of balance and swimming performance (low evidence). Better trunk/lower limb strength, power and vertical jumps measures were associated with better swimming performance. CONCLUSIONS: In methodologically similar studies, some trunk/lower limb outcomes are associated with shoulder complaint or sport/swimming performance. Results should be considered with caution and future studies should use better methodologies.

Estudantes-atletas: reflexões acerca de seu desenvolvimento / Student-athletes: reflections about their development / Estudiantes-deportistas: reflexiones sobre su desarrollo

O presente ensaio tem como objetivo refletir sobre o desenvolvimento do estudante-atleta, tendo como base o documento intitulado Modelo de Desenvolvimento Esportivo, proposto pelo Comitê Olímpico do Brasil. Ao longo do texto, são discutidos os desafios do estudante-atleta ao seguir a carreira-dupla, bem como sobre a dupla-carreira no Brasil e no mundo. Por fim, sugere-se a criação de uma legislação nacional e de políticas institucionais que promovam o acesso, a permanência e a finalização da formação destes estudantes-atletas. (AU).

The present study aimed to reflect on the development of student-athletes based on the document named Sports Development Model proposed by the Brazilian Olympic Committee. Throughout the ext, the student-athlete and their challenges when following a dual ca-reer are discussed, as well as the dual career in Brazil and in the world. Finally, it is suggested the development of national legislation and insti-tutional policies that promote access, permanence and finalization of the graduation for these student-athletes (AU).

Este ensayo tuvo como objetivo reflexionar sobre el desar-rollo de los estudiantes-atletas a partir del documento titulado Modelo de Desarrollo Deportivo, propuesto por el Comité Olímpico de Brasil. A lo largo del texto, se discute el estudiante-atleta y sus desafíos al se-guir una carrera dual, así como la carrera dual en Brasil y en el mundo. Finalmente, se sugiere la creación de legislación nacional y políticas ins-titucionales que promuevan el acceso, permanencia y culminación de la formación de estos estudiantes deportistas (AU).

Estudantes-atletas: reflexões acerca de seu desenvolvimento / Student-athletes: reflections about their development / Estudiantes-deportistas: reflexiones sobre su desarrollo

O presente ensaio tem como objetivo refletir sobre o desenvolvimento do estudante-atleta, tendo como base o documento intitulado Modelo de Desenvolvimento Esportivo, proposto pelo Comitê Olímpico do Brasil. Ao longo do texto, são discutidos os desafios do estudante-atleta ao seguir a carreira-dupla, bem como sobre a dupla-carreira no Brasil e no mundo. Por fim, sugere-se a criação de uma legislação nacional e de políticas institucionais que promovam o acesso, a permanência e a finalização da formação destes estudantes-atletas.

The present study aimed to reflect on the development of student-athletes based on the document named Sports Development Model proposed by the Brazilian Olympic Committee. Throughout the text, the student-athlete and their challenges when following a dual ca-reer are discussed, as well as the dual career in Brazil and in the world. Finally, it is suggested the development of national legislation and insti-tutional policies that promote access, permanence and finalization of the graduation for these student-athletes.

Este ensayo tuvo como objetivo reflexionar sobre el desarrollo de los estudiantes-atletas a partir del documento titulado Modelo de Desarrollo Deportivo, propuesto por el Comité Olímpico de Brasil. A lo largo del texto, se discute el estudiante-atleta y sus desafíos al seguir una carrera dual, así como la carrera dual en Brasil y en el mundo. Finalmente, se sugiere la creación de legislación nacional y políticas institucionales que promuevan el acceso, permanencia y culminación de la formación de estos estudiantes deportistas.