文章基本信息

标题：Reproducibility of Cycling Time to Exhaustion at VO2 Max in Competitive Cyclists
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作者：VITOR PEREIRA COSTA ; VITOR PEREIRA COSTA ; DIHOGO GAMA DE MATOS 等
期刊名称：Journal of exercise physiology online
印刷版ISSN：1097-9751
出版年度：2011
卷号：14
期号：1
页码：28-34
语种：English
出版社：American Society of Exercise Physiologists
摘要：The purpose of this study was to examine the reproducibility of cycling time to exhaustion (Tmax) at maximum oxygen uptake (VO2 max) in competitive cyclists. Seventeen subjects (age, 36.9 ± 7.8 yrs; body mass, 71.1 ± 10.1 kg; height, 1.73 ± 0.8 cm; body fat, 13.1 ± 5.7 %; VO2 max, 54.7 ± 9.0 mlkg-1 min-1 ) performed an incremental exercise test and two Tmax tests. While cycling time to exhaustion was correlated for both Tmax tests (r = 0.80, p = 0.01), the Tmax2 test (238.6 ± 33.5 sec) was significantly higher than the Tmax1 test (223.2 ± 31.3 sec, p < 0.02). Similarly, heart rate to exhaustion was correlated for both Tmax tests (r = 0.89, p = 0.01) but the difference failed to have any practical value (Tmax1 = 182 ± 8 vs. Tmax2 = 183 ± 7 bpm). The blood lactate peak from the first test (10.8 ± 2.0 mmoll -1 ) was also correlated (r = 0.63, p = 0.07) without a significant difference between the two tests (9.8 ± 1.5 mmoll -1 ). VO2 peak for the first test (56.5 ± 9.1 mlkg-1 min-1 ) was strongly correlated (r = 0.94, p = 0.06) and did not differ from the second test (54.6 ± 7.8 mlkg-1 min-1 ). These data demonstrate that the time to exhaustion (Tmax) at VO2 max in a series of two cycling tests is significantly greater than the first.
关键词：Reproducibility;Cycling Time to Exhaustion;VO2 Max.