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KMID : 0613820070170091255
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Journal of Life Science
2007 Volume.17 No. 9 p.1255 ~ p.1259
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The Effect of Sampling Intervals on VO2 Plateau and Reinvestigation of Other Criteria During VO2max Test
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Yoon Byung-Kon
Kwak Yi-Sub
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Abstract
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The purpose of this study was to elucidate incidence of VO2 plateau by comparing data derived from different time averaging intervals during incremental cycling exercise to VO2max. Seventeen subjects (age: 23.5±3.3 years and VO2max: 3.65±0.73 L/min, respectively) completed VO2max tests on cycle ergometer which breath by breath gas exchange data were obtained. These data were time-averaged into 11-breath, 15, 30 and 60 s sampling intervals. The incidence of plateau were 100, 35, 24 and 6% for the 11 breath, 15 s, 30 s and 60 s averaging, respectively. No correlation was between △VO2 at VO2max and VO2max (r=-0.008). 53% (maximal HR within 10 b/min) and 100% (RER≥1.15) of subjects met the criteria for attainment of VO2max. This data indicate that shorter sampling intervals (11 breath) is the most suitable for detection of the VO2 plateau and RER can be used for the criteria for attainment of VO2max but not maximal HR. Also, the incidence of a plateau is not related to training status or physical fitness of subjects.
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KEYWORD
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Cycle ergometer, VO2 plateau, RER, heart rate
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