Limiar anaeróbio e velocidade crítica determinada com diferentes distâncias em nadadores de 10 a 15 anos: relações com a performance e a resposta do lactato sanguíneo em testes de endurance
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Data
2003-02-01
Autores
Greco, Camila Coelho [UNESP]
Denadai, Benedito Sérgio [UNESP]
Pellegrinotti, Ídico Luiz
Freitas, Aline del Bianco
Gomide, Euripedes
Título da Revista
ISSN da Revista
Título de Volume
Editor
Sociedade Brasileira de Medicina do Exercício e do Esporte
Resumo
O objetivo deste estudo foi comparar a velocidade crítica (VC) determinada através de diferentes distâncias com o limiar anaeróbio (LAn) e as velocidades máximas mantidas em testes de 20 (V20) e 30 (V30) minutos na natação, verificando se a idade cronológica em jovens nadadores interfere nessas relações. Participaram do estudo 31 nadadores (17 meninas e 14 meninos) divididos segundo a idade cronológica em dois grupos: 10 a 12 anos e 13 a 15 anos. O LAn foi determinado como sendo a velocidade correspondente a 4mM de lactato sanguíneo. A VC1 (25/50/100m), VC2 (100/200/400m) e a VC3 (50/100/200m) foram calculadas através do coeficiente angular da reta de regressão linear entre as distâncias e seus respectivos tempos. As V20 e V30 foram determinadas através de três a seis repetições, com coletas de sangue no 10º minuto e ao final do tiro. Para o grupo de 10 a 12 anos, a VC1 (m/s) (0,98 ± 0,17) e o LAn (0,97 ± 0,12) não foram diferentes entre si, sendo maiores do que a VC2 (0,92 ± 0,16), VC3 (0,89 ± 0,18), V20 (0,92 ± 0,11) e V30 (0,90 ± 0,11). Para o grupo de 13 a 15 anos, a VC1 (m/s)(1,11 ± 0,11) foi maior do que o LAn (1,02 ± 0,07), V20 (0,99 ± 0,09), V30 (0,97 ± 0,09), VC2 (0,98 ± 0,11) e VC3 (1,00 ± 0,11). Pode-se concluir que a distância utilizada na determinação da VC interfere no valor obtido, independente da idade cronológica. A VC determinada com distâncias entre 50 e 400m pode ser utilizada na avaliação da capacidade aeróbia de crianças e adolescentes, substituindo os testes contínuos máximos com durações próximas a 20 ou 30 minutos.
The objective of this study was to compare the critical speed (CS) determined from different distances with the anaerobic threshold (AnT) and the maximum speeds in tests of 20 (S20) and 30 (S30) minutes, and to check if the chronological age of young swimmers can influence these relations. 31 swimmers (17 girls and 14 boys) participated in this study, divided by chronological age into two groups: 10-12 and 13-15 years. The AnT was determined as the velocity corresponding to 4 mM of blood lactate. The CS1 (25/50/100 m), CS2 (100/200/400 m), and the CS3 (50/100/200 m) had been calculated through the slope of the linear regression between the distances and their respective times. The S20 and S30 were determined through 3 to 6 trials, with blood collections at the 10th min and at the end of each test. For the 10-12 group, CS1 (m/s) (0.98 + 0.17) and AnT (0.97 + 0.12) were not different, being higher than CS2 (0.92 + 0.16), CS3 (0.89 + 0.18), S20 (0.92 + 0.11) and S30 (0.90 + 0.11). For the 13-15 group, CS1 (m/s) (1.11 + 0.11) was higher than AnT (1.02 + 0.07), S20 (0.99 + 0.09), S30 (0.97 + 0.09), CS2 (0.98 + 0.11) and CS3 (1.00 + 0.11). It can be concluded that the distance used for the determination of CS interferes on its value, irrespective of the chronological age. CS determined with distances between 50 and 400 m can be used for evaluation of the aerobic capacity of children and adolescents, substituting the maximum continuous tests of 20 or 30 minutes.
The objective of this study was to compare the critical speed (CS) determined from different distances with the anaerobic threshold (AnT) and the maximum speeds in tests of 20 (S20) and 30 (S30) minutes, and to check if the chronological age of young swimmers can influence these relations. 31 swimmers (17 girls and 14 boys) participated in this study, divided by chronological age into two groups: 10-12 and 13-15 years. The AnT was determined as the velocity corresponding to 4 mM of blood lactate. The CS1 (25/50/100 m), CS2 (100/200/400 m), and the CS3 (50/100/200 m) had been calculated through the slope of the linear regression between the distances and their respective times. The S20 and S30 were determined through 3 to 6 trials, with blood collections at the 10th min and at the end of each test. For the 10-12 group, CS1 (m/s) (0.98 + 0.17) and AnT (0.97 + 0.12) were not different, being higher than CS2 (0.92 + 0.16), CS3 (0.89 + 0.18), S20 (0.92 + 0.11) and S30 (0.90 + 0.11). For the 13-15 group, CS1 (m/s) (1.11 + 0.11) was higher than AnT (1.02 + 0.07), S20 (0.99 + 0.09), S30 (0.97 + 0.09), CS2 (0.98 + 0.11) and CS3 (1.00 + 0.11). It can be concluded that the distance used for the determination of CS interferes on its value, irrespective of the chronological age. CS determined with distances between 50 and 400 m can be used for evaluation of the aerobic capacity of children and adolescents, substituting the maximum continuous tests of 20 or 30 minutes.
Descrição
Palavras-chave
Limiar anaeróbio, Velocidade crítica, Lactato, Crianças, Natação, Anaerobic threshold, Critical speed, Lactate, Children, Swimming
Como citar
Revista Brasileira de Medicina do Esporte. Sociedade Brasileira de Medicina do Exercício e do Esporte, v. 9, n. 1, p. 2-8, 2003.