Multidimensional indicators of sporting potential of brazilian trampoline gymnasts / Indicadores multidimensionais do potencial esportivo de ginastas de trampolim brasileiros

ABSTRACT The scientific evidence on the profile of trampoline gymnastic athletes is scarce. Considering that the individual trampoline is an Olympic sport, it is important to investigate the characteristics of these athletes in Brazil. The aim of this study was to evaluate anthropometric, physical-motor, maturational, socio-environmental indicators and the sporting potential of Brazilian trampoline gymnasts, investigating differences between age categories. There were 147 athletes participating who competed in the State and Brazilian Championship of Trampoline Gymnastics by Age Group in 2017-2018. A multidimensional battery of tests was carried out, comparing the indicators collected between the categories 9 to 10 years, 11 to 12 years, 13 to 14 years, 15 to 16 years and 17 years or older. The coaches (n = 20) assessed the sporting potential of their gymnasts, in relation to the expectation of success in the future. The results showed statistically significant differences in body size and composition, somatotype, handgrip strength, countermovement jump, flexibility and sporting potential among athletes of different age categories, in both sexes. In addition, 30% of gymnasts showed high sporting potential, according to the perspectives of the coaches. It is concluded that the multidimensional indicators related to the sporting potential of Brazilian trampoline gymnasts vary according to the age category. This study is a pioneer in characterizing the profile of the elite Brazilian trampoline gymnast, using a dynamic approach related to the sporting talent.

RESUMO A evidência científica sobre o perfil de atletas de ginástica de trampolim é escassa. Considerando que o trampolim individual é uma modalidade olímpica, torna-se importante investigar as características desses atletas na realidade brasileira. O objetivo deste estudo foi avaliar indicadores antropométricos, físico-motores, maturacionais, socioambientais e o potencial esportivo de ginastas de trampolim brasileiros, investigando diferenças entre as categorias etárias. Participaram 147 atletas que disputaram o Campeonato Estadual e Brasileiro de Ginástica de Trampolim por Idades em 2017-2018. Foi realizada uma bateria de testes multidimensional, comparando os indicadores coletados entre as categorias 9-10 anos, 11-12 anos, 13-14 anos, 15-16 anos e 17 anos ou mais. Os treinadores (n = 20) avaliaram o potencial esportivo dos seus ginastas, em relação a expectativa de sucesso no futuro. Os resultados mostraram diferenças estatisticamente significantes no tamanho e composição corporal, somatotipo, força de preensão manual, salto contramovimento, flexibilidade e no potencial esportivo entre os atletas de diferentes categorias etárias, em ambos os sexos. Além disso, 30% dos ginastas apresentaram elevado potencial esportivo, segundo a opinião dos treinadores. Conclui-se que os indicadores multidimensionais relacionados ao potencial esportivo dos ginastas de trampolim brasileiros variam em função da categoria etária. Este estudo é pioneiro na caracterização do perfil do ginasta de trampolim brasileiro de elite, utilizando uma abordagem dinâmica relacionada ao talento esportivo.

Nível de desempenho técnico-tático e a classificação final das equipes catarinenses de voleibol das categorias de formação / Levels of technical-tactical performance and final classification of Santa Catarina volleyball teams in formation categories / Nivel de rendimiento técnico-táctico y clasificación final de los equipos de vóleibol de Santa Catarina en las categorías de formación

Resumo O objetivo deste estudo foi verificar a associação entre nível de desempenho técnico-tático de jogadores e a classificação competitiva em categorias de formação do voleibol. Participaram 271 atletas finalistas do campeonato estadual catarinense de 2010. As ações técnico-táticas foram analisadas conforme o Instrumento de Avaliação do Desempenho Técnico-Tático (IAD-VB) de Collet et al. (2011). Para análise dos dados, recorreu-se à regressão logística multinomial com p ≤ 0,001. Os resultados evidenciaram que as equipes que apresentaram melhor desempenho técnico-tático geral obtiveram as primeiras classificações no campeonato. O nível de desempenho nos componentes tomada de decisão e eficácia também evidenciou associação positiva com a classificação final do campeonato.

Abstract The aim of this study was to verify the association between technical and tactical performance and the competitive classification of young athletes in volleyball. Participated 271 athletes finalists in the Santa Catarina state championship 2010. The technical-tactical actions were analyzed by Instrument of Performance Assessment Technical-Tactical (IAD-VB) of Collet et al. (2011). For data analysis was used a multinomial logistic regression with p <0.001. The results revealed that teams performed better technical-tactical obtained the first overall ratings in the league. The level of performance in components decision making and effectiveness is associated too with the championship classification.

Resumen El objetivo de este estudio fue verificar la asociación ente el nivel de rendimiento técnico-táctico de los jugadores y la clasificación final en el campeonato de vóleibol en las categorías de formación. Participaron 271 atletas finalistas en el campeonato del Estado de Santa Catarina de 2010. Se procedió al análisis técnico-táctico de las acciones con el Instrumento de Evaluación del Rendimiento Técnico-Táctico (IAD-VB) formulado por Collet et al. (2011). Para el análisis de los datos se utilizó regresión logística multinomial, con p < 0,001. Los resultados revelaron que los equipos de mejor rendimiento técnico-táctico estaban clasificados en los primeros lugares de la liga. El nivel de rendimiento de los componentes en la toma de decisiones y la eficacia también presentaron una asociación positiva con la clasificación final del campeonato.

VALIDITY OF METHODS TO MEASURE TOTAL ENERGY EXPENDITURE OF BASEBALL PLAYERS IN JAPANESE HIGH SCHOOL / 体力科学

The purpose of this study was to assess the validity of activity record (AR), accelerometer (AC) and heart rate (HR) methods in comparison with the doubly-labeled water (DLW) method as the criterion measure of total energy expenditure (TEE) in high school students undergoing vigorous activities. Twelve baseball players in Japanese high school (16.5±0.5 yrs) were monitored for seven consecutive days. TEE values obtained over a 3-day-period by AR, AC and HR were simultaneously validated against TEE measured by DLW over a 7-day-period. TEE value measured by DLW was 4922±391 kcal/day. The Physical activity level (PAL=TEE/BMR (basal metabolic rate)) was 2.66±0.14. TEE estimated by AR, AC and HR was significantly different from DLW, with mean differences of -13.9±6.5%, 35.3±3.6% and 31.6±23.9%, respectively. However, TEE estimated by AC and AR significantly correlated with that measured by DLW (r=0.73, r=0.70, p<0.05, respectively). The limits of agreement between DLW and AR, AC and HR were from -1350 kcal/d to -21 kcal/d, -2293 kcal/d to -1192 kcal/d, and 3875 kcal/d to -797 kcal/d respectively. AC was superior to the other methods. However, the limits of agreement in AR were similar to AC. These data suggest that on accuracy and precision, AR would be superior to the other two for predicting TEE in high school students undergoing vigorous activities. However, AC has the advantages being able to examine patterns of activity over long periods of time without interfering with normal movement and the ability to store data continuously over long periods of time. Therefore, it was suggested that, simultaneously, the AR and AC methods are accurate predictors of TEE and patterns of activity while undergoing sports vigorous activities.