Nakagaichi M, Tanaka K
University of Tsukuba.
Appl Human Sci. 1998 Nov;17(6):281-8. doi: 10.2114/jpa.17.281.
The direct measurement of true maximal oxygen uptake (VO2max) and oxygen uptake corresponding to anaerobic threshold (VO2AT) is not always practical, especially in middle age and older populations. Therefore, the purpose of this study was to develop a simple test that could accurately estimate cardiorespiratory fitness using a submaximal treadmill walking protocol for middle age, older, sedentary individuals and patients with chronic disease. Subjects for this study were 42 men (44.9 +/- 15.7 years), which included 17 patients with coronary heart disease (57.0 +/- 9.6 years). VO2peak and VO2AT were measured using a treadmill protocol (VO2peak; 38.4 +/- 11.6 ml/kg/min, VO2AT; 22.9 +/- 7.4 ml/kg/min). This simple test assessed the total distance covered in 12 minutes on the treadmill at an intensity corresponding to either 1) 11 on the Borg scale of ratings of perceived exertion (RPE11), 2) 13 on the Borg scale of ratings of perceived exertion (RPE13), or 3) "Optimal" by subjective judgment. The correlation coefficients between VO2peak or VO2AT and total distance at the three intensities (RPE11; 950 +/- 100 m, RPE13; 1080 +/- 140 m Optimal; 1050 +/- 110 m) were statistically significant, ranging from 0.72 to 0.85. The test-retest reliability coefficient on 12 subjects was 0.98. The oxygen uptake (VO2) was measured during the three walk tests on 15 subjects. There were no significant changes in submaximal VO2 values from min 4 to min 12 (RPE11; 19.8 +/- 4.7 ml/kg/min, RPE13; 24.1 +/- 4.9 ml/kg/min, Optimal; 23.1 +/- 4.8 ml/kg/min) in any of the three tests. Similarly, the three submaximal VO2 values did not differ from the VO2AT value (21.2 +/- 8.3 ml/kg/min) obtained in the initial maximal test. These results suggest that the 12-min submaximal treadmill walk test (STWT) is a valid method for the assessment of VO2peak and VO2AT. Therefore, the STWT could be a useful performance test for evaluating cardiorespiratory fitness in middle age, older, sedentary individuals and patients with chronic disease.
直接测量真正的最大摄氧量（VO2max）以及与无氧阈相对应的摄氧量（VO2AT）并不总是可行的，尤其是在中年及老年人群中。因此，本研究的目的是开发一种简单的测试方法，该方法可以使用次极量跑步机步行方案，针对中年、老年、久坐不动的个体以及慢性病患者准确估计心肺适能。本研究的受试者为42名男性（44.9±15.7岁），其中包括17名冠心病患者（57.0±9.6岁）。使用跑步机方案测量VO2peak和VO2AT（VO2peak；38.4±11.6毫升/千克/分钟，VO2AT；22.9±7.4毫升/千克/分钟）。这个简单的测试评估了在跑步机上12分钟内以以下三种强度之一所覆盖的总距离：1）伯格主观用力感觉量表（RPE）评分为11；2）伯格主观用力感觉量表评分为13；3）主观判断的“最佳”强度。VO2peak或VO2AT与三种强度下的总距离（RPE11；950±100米，RPE13；1080±140米，最佳；1050±110米）之间的相关系数具有统计学意义，范围为0.72至0.85。对12名受试者进行的重测信度系数为0.98。在15名受试者的三次步行测试过程中测量了摄氧量（VO2）。在任何一次测试中，从第4分钟到第12分钟，次极量VO2值均无显著变化（RPE11；19.8±4.7毫升/千克/分钟，RPE13；24.1±4.9毫升/千克/分钟，最佳；23.1±4.8毫升/千克/分钟）。同样，这三个次极量VO2值与初始最大测试中获得的VO2AT值（21.2±8.3毫升/千克/分钟）没有差异。这些结果表明，12分钟次极量跑步机步行测试（STWT）是评估VO2peak和VO2AT的有效方法。因此，STWT可能是一种用于评估中年、老年、久坐不动的个体以及慢性病患者心肺适能的有用性能测试。
