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Purpose. The purpose of the study was to identify the reasons why training athletes practise soccer, as well as verify changes in motivation in under-15 and under-17 athletes. Methods. Overall, 100 male training athletes from a 2 nd division soccer club of the Brazilian Men's soccer Championship in the state of Goiás participated in the research. The subjects were divided into 2 categories: under-14 (aged 12-14 years) and under-17 (aged 15-17 years). The mean age equalled 14.3 ± 1.4 years and the experience time was 10 ± 4 months. The instrument for data collection was the Motives for Physical Activity Measure-revised scale. Results. The results showed that the main reason for practising soccer was fun, followed by competence, fitness, social aspects, and appearance, successively [F(3,195,316,349) = 60.036; p < 0.05]. However, when analysing the category of 12-14 years, no difference was observed between the fun and competence dimensions, between competence and fitness, or between fitness and social aspects. The comparison between the categories proved that there were differences in appearance and social aspects dimensions, and that these aspects motivated more the athletes aged 15-17 years. Conclusions. Consequently, the intrinsic motivation, specifically the reasons related to fun and competence, were the factors considered most important for soccer practice among young training athletes aged 12-17 years.

O esporte e a competição são inseparáveis e estão presentes na vida dos jovens que praticam esportes e, por isso, é necessário criar ambientes favoráveis ao desenvolvimento desses indivíduos. O objetivo desta pesquisa qualitativa foi conhecer as percepções dos treinadores de handebol de elite quanto as premissas associadas à promoção de competições para jovens. Quatro treinadores de elite foram entrevistados e, a partir das entrevistas, foi possível dividir os resultados em quatro categorias: a) adaptações para competições; b) Utilização do sistema defensivo individual; c) Papel do treinador; e d) Vitória como foco nas competições de base. Foram apresentadas necessidades e sugestões para criar um ambiente competitivo favorável, além de pressupostos a atuação do treinador de base.

Objetivo: compreender o desenvolvimento do ajuste postural antecipatório na inicialização da marcha no desenvolvimento do andar independente em crianças típicas. Participantes: 50 crianças divididas em: G1- 1.3 anos, G2- 2 anos, G3- 3 anos e G4- 4 anos. Variáveis: Amplitude de deslocamento anteroposterior (COPAP) e mediolateral (COPML) do centro de pressão (COP), velocidade média de deslocamento do COP nas direções anteroposterior e mediolateral (VELAP e VELML) durante as fases da inicialização do passo. Resultados: COPAP_1, COPAP_2 e COPAP_3 foram maiores no grupo G1, VELAP_1 e VELAP_2 no G1 são maiores. Conclusão: Com a experiência do andar independente a criança torna-se mais habilidosa devido ao aprimoramento de sua capacidade para avaliar as condições do ambiente.

This study aims at analyzing the effectiveness of using an additional field player, when goalkeeper is replaced, during the positional attack in the case of numerical equality, superiority or inferiority and when counterattacks are suffered. The sample consisted of 841 attack actions collected from eight games of men's teams in the knockout phase of the Rio 2016 Olympic Games. The number of goals scored and the counterattacks suffered in symmetrical and asymmetrical situations were checked for both situations: using the additional player or not. Was performed the chi-square test (Φ) and the effect power was calculated using Phi (x 2). The analysis of the attack showed that there was no association between goal-making and the use of the additional field player in different asymmetric situations. There was no association between the reach of the goal in case of opponent's counterattack substitution of the goalkeeper with the additional field player or not as well as no association between punishment and goal achievement in different offensive situations. The use of an additional field player did not benefit the team in attack actions and brought no disadvantages in the scoreboard. These results show that, in this championship, such strategy did not produce significant changes in decisive games of men's handball.