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标题：Comparison between two objective and individual methods of determination of the running speed at lactate threshold
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作者：Fabiana Andrade Machado ; Solange Marta Franzói de Moraes ; Cecília Segabinazi Peserico 等
期刊名称：Motriz. Journal of Physical Education. UNESP
印刷版ISSN：1980-6574
出版年度：2012
卷号：18
期号：2
页码：298-306
DOI：10.5016/4129
语种：Portuguese
出版社：UNESP - São Paulo State University
摘要：O objetivo deste estudo foi comparar as velocidades de corrida no limiar de lactato (vLL) determinadas pelos métodos objetivos e individuais Dmax (vLLDmax) e log-log (vLLlog-log) sendo esperado uma relação entre eles melhor do que a relação deles com o método de concentração fixa de lactato sanguíneo em 3,5 mM (vLL3,5mM). Participaram deste estudo 17 corredoras recreacionais com experiência em provas de rua de 10 km (idade: 42,1 ± 6,7 anos; estatura: 1,63 ± 0,03 m; massa corporal 57,2 ± 4,9 kg) que realizaram um teste incremental em esteira ergométrica, com velocidade inicial de 7 km/h e incrementos de 1 km/h a cada três minutos. Amostras de sangue foram coletadas nas pausas de 30 segundos entre cada estágio. As vLL foram 10,3 ± 1,4 (vLLlog-log), 10,9 ± 0,8 (vLLDmax) e 11,6 ± 1,2 km/h (vLL3,5mM) sendo a vLL3,5mM significantemente superior à vLLlog-log (P < 0,001) e à vLLDmax (P = 0,024). Apesar disso, a amplitude dos limites de concordância (±1,96 DP) entre as vLL foi semelhante, variando entre ±1,48 e ±1,77 km/h e a correlação entre a vLL3,5mM e as velocidades vLLlog-log (r = 0,70) e vLLDmax (r = 0,78) foi maior que a correlação daquelas velocidades entre si (r = 0,65). Em suma, as velocidades vLLlog-log e vLLDmax não apresentaram uma melhor relação entre si do que a relação delas com a vLL3,5mM.
其他摘要：The aim of this study was to compare the running speed at lactate threshold (sLT) determined by the objective and individual methods Dmax (sLTDmax) and log-log (sLTlog-log) being expected a better relationship between them than the relationship of them to the fixed lactate concentration method at 3.5 mM (sLT3.5mM). Seventeen amateur women runners, with experience of 10 km road races (age: 42.1 ± 6.7 year; height: 1.63 ± 0.03 m; body mass 57.2 ± 4.9 kg), participated in this study. They performed an incremental exercise test on a motorized treadmill, which the initial speed was 7 km/h, with increments of 1km/h every 3-min. Blood samples were collected between the stages, during a rest of 30-s. The sLT were 10.3 ± 1.4 (sLTlog-log), 10.9 ± 0.8 (sLTDmax) and 11.6 ± 1.2 km/h (sLT3.5mM) being the sLT3.5mM significantly higher than sLTlog-log (P < 0.001) and sLTDmax (P = 0.024). Despite that, the limits of agreement range (±1.96 SD) among the sLT was similar, varying between ±1.48 and ±1.77 km/h and the correlation between sLT3.5mM and the speeds sLTlog-log (r = 0.70) and sLTDmax (r = 0.78) was higher than the correlation between sLTlog-log and sLTDmax (r = 0.65). In summary, the sLTlog-log and sLTDmax speeds did not show a better relationship between themselves than the relationship of them to the sLT3.5mM.
关键词：concordância;comparação;Dmax;log-log.;Agreement. Comparison. Dmax. Log-log.
其他关键词：Agreement. Comparison. Dmax. Log-log.