最大摄氧量判定指标标准的有效性研究
On Validity of Criteria for Maximal Oxygen Uptake
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摘要: 为探讨二级指标判定最大摄氧量的有效性、准确性，测定并分析了8名男大学生在递增负荷至力竭运动中的最大摄氧量（VO2max ）、摄氧量平台、呼吸商（RER）、心率（HRmax）、血乳酸（LA）等指标，采用二级指标的某一固定值作为判定VO2max的标准，结果显示：在递增负荷至力竭运动中，以呼吸商1.10和1.15为判定标准，对应的摄氧量值分别为（3.78±0.89） L/min和（3.96±0.91） L/min ，明显低估受试者实际最大摄氧量值的12.7％和8.5％；以心率≥180次/min和（220-年龄）±10次/min为判定标准，分别有2名和5名的受试者未能达标，但其中1/2和3/5的受试者已出现摄氧量平台；以血乳酸LA≥8 mmol/L为判定标准，有2名受试者未达标，其中1人已出现摄氧量平台．认为在递增负荷至力竭运动中，采用呼吸商可能低估受试者的最大摄氧量值，采用心率和血乳酸可能低估最大摄氧量的达标率．因此，为提高评估的准确性和有效性，对次级指标标准的选用要慎重．Abstract: This paper deals with the analysis of the validity and accuracy of secondary criteria for VO 2max . Eight healthy male subjects completed a ramp exercise test (at 25 W/min) to exhaustion on an electrically braked cycle ergometer .Pulmonary gas exchange has been measured breath-by-breath ,blood lactate been determined after three minutes of the test by collecting fingertip blood ,and heart rate been tested by wear-ing the Polar heart monitor .By means of the most widely used 1 .10 and 1 .15 of RER criteria ,the corre-sponding test values are (3 .78 ± 0 .89) L/min and (3 .96 ± 0 .91) L/min ,significantly underestimated the VO2max actual value of 12 .7% and 8 .5% .The criteria of HRmax (≥180 b/min and age predicted HRmax ± 10 b/min) ,respectively 2 and 5 subjects could not reach the standards ,but 1/2 and 3/5 evidenced a dis-cernible platform of oxygen uptake .2 subjects did not meet the 8 mmol/L of LA criterion ,but 1/2 reached a VO2max platform .It may underestimate the value of VO2max by using RER and underestimate the standard-reaching rate by means of HR and LA ,so select the secondary indicators to determine VO2max is debatable .
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Key words:
- VO2max，assessment criteria，validity /
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