RESUMO
BACKGROUND: One of the most popular high-intensity interval exercises is the called "Tabata Protocol". However, most investigations have limitations in describing the work intensity, and this fact appears to be due to the protocol unfeasibility. Furthermore, the physiological demands and energetic contribution during this kind of exercise remain unclear. METHODS: Eight physically active students (21.8 ± 3.7 years) and eight well-trained cycling athletes (27.8 ± 6.4 years) were enrolled. In the first visit, we collected descriptive data and the peak power output (PPO). On the next three visits, in random order, participants performed interval training with the same time structure (effort:rest 20s:10s) but using different intensities (115%, 130%, and 170% of PPO). We collected the number of sprints, power output, oxygen consumption, blood lactate, and heart rate. RESULTS: The analysis of variance for multivariate test (number of sprints, power output, blood lactate, peak heart rate and percentage of maximal heart rate) showed significant differences between groups (F = 9.62; p = 0.001) and intensities (F = 384.05; p < 0.001), with no interactions (F = 0.94; p = 0.57). All three energetic contributions and intensities were different between protocols. The higher contribution was aerobic, followed by alactic and lactic. The aerobic contribution was higher at 115%PPO, while the alactic system showed higher contribution at 130%PPO. In conclusion, the aerobic system was predominant in the three exercise protocols, and we observed a higher contribution at lower intensities.
RESUMO
Introdução: o Projeto Esporte Brasil (PROESP-BR) configura-se em delinear o perfil de crianças e jovens brasileiros no que se refere ao crescimento e desenvolvimento. Nessa perspectiva, este programa busca observar aspectos físicos em duas vertentes, a aptidão física relacionada à saúde e ao desempenho esportivo. Objetivo: reflexão teórica sobre as possibilidades e a importância da utilização prática do PROESP-BR relacionada ao desempenho esportivo em adolescentes praticantes do Handebol. Métodos: trata-se de uma revisão da literatura de 2011 a 2016, por meio de levantamento de artigos científicos nas bases de dados eletrônica do portal da CAPES. Para tanto, foram utilizadas as seguintes palavras-chave: Educação Física e Treinamento, Desempenho Atlético, Handebol e PROESP-BR. Resultados: foram encontrados cinco artigos científicos completos, cujos temas estavam relacionados com o interesse do presente estudo. Conclusão: baseado na literatura científica selecionada, pode-se evidenciar a importância da aplicação do manual PROESP-BR nos treinamentos de Handebol e a aplicação do PROESP pelo professor durante os treinamentos em atletas de handebol promoveram uma melhora na aptidão física e o desempenho esportivo a este atleta. Pois com os resultados obtidos a cada avaliação pode-se ter parâmetro para o melhoramento esportivo destes atletas.
Introduction: the Brazilian Sport Project (PROESP-Br) is designed to outline the profile of Brazilian children and young people in terms of growth and development. From this perspective, this program seeks to observe physical aspects in two aspects, physical fitness related to health and sports performance. Objective: theoretical reflection about the possibilities and importance of the practical use of PROESP-BR related to the sporting performance in adolescents practicing Handball. Methods: this is a review of the literature from 2011 to 2016, through a survey of scientific articles in the electronic databases of the CAPES portal. For that, the following keywords were used: Physical Education and Training, Athletic Performance, Handball and PROESP-BR. Results: five complete scientific articles were found whose themes were related to the interest of the present study. Conclusion: based on the selected scientific literature, it is possible to highlight the importance of applying the manual PROESPBR in Handball and the application of PROESP by the teacher during the training in handball athletes promoted an improvement in physical fitness and athletic performance to this athlete. For with the results obtained at each evaluation can be parameter for the sports improvement of these athletes.
Assuntos
Humanos , Desempenho Atlético , Educação Física e TreinamentoRESUMO
Estas considerações sobre a água abordam a sua distribuição no planeta terra e a importância para a vida, ao enfatizar que é um recurso escasso, finito e essencial para a existência das plantas, animais e do homem. Apresentam os fatores que influenciam o consumo de água pelos ruminantes e os aspectos relevantes que afetam a distribuição corporal da mesma nos animais, principalmente os efeitos em sistemas de produção de bovinos de leite.(AU)
These considerations about water handle its distribution in the earth planet and the importance to life, to emphasize that it is a scarce resource finite and essential to the plants , animals and human existence. It shows the factors that influence water consumption by ruminants and relevant aspects that affect the body distribution of this in the animals, especially the effects on Dairy cattle production systems.(AU)