Becque M D, Katch V, Marks C, Dyer R
Department of Movement Science, School of Medicine, University of Michigan, Ann Arbor 48109-2214.
Int J Sports Med. 1993 May;14(4):220-3. doi: 10.1055/s-2007-1021167.
To assess the reliability and within subject variability of steady-rate ventilation (VE), oxygen uptake (VO2), heart rate, systolic and diastolic blood pressure, 4 subjects exercised for 10 minutes at 3 work rates on a bicycle ergometer: 50 W, 125 W and 55% of maximum work rate (55% max). Each testing session included two work rates and only 2 testing sessions were scheduled per week. The order of the work rates was counterbalanced. In 8 to 10 weeks, 3 of the subjects completed 20 trials at 50 W while the fourth subject completed 11 trials, and all the subjects completed 10 trials at 125 W and 55% max. The within subject variability (S2w) was expressed as a percent of the mean steady-rate response. VO2 ranged from 21.2% to 27.5% of VO2max at 50 W, from 37.7% to 49.7% at 125 W and from 42.9% to 63.7% at 55% max. The S2w averaged 6.8% for VE, 4.3% for VO2, 3.2% for heart rate, 7.3% for systolic blood pressure and 10.5% for diastolic blood pressure. Reliability coefficients were calculated for the steady-rate scores by dividing the between subject variation by the total variation. The reliability was similar for VE, VO2 and heart rate and ranged from r = 0.69 to r = 0.97. Systolic and diastolic blood pressure reliabilities were lower and ranged from r = 0.27 and r = 0.80. In summary, the steady-rate ventilation, oxygen uptake and heart rate responses were reliable and consistent. The reliability of blood pressure was low. It is possible that this low reliability may result from variability in stroke volume or total peripheral resistance.
为评估稳定速率通气（VE）、摄氧量（VO₂）、心率、收缩压和舒张压的可靠性及受试者内变异性，4名受试者在自行车测力计上以3种工作强度进行了10分钟的运动：50瓦、125瓦以及最大工作强度的55%（55%最大强度）。每次测试包含两种工作强度，且每周仅安排2次测试。工作强度的顺序进行了平衡处理。在8至10周内，3名受试者完成了20次50瓦强度的测试，而第四名受试者完成了11次测试，所有受试者均完成了10次125瓦和55%最大强度的测试。受试者内变异性（S₂w）以稳定速率反应平均值的百分比表示。在50瓦时，VO₂范围为VO₂max的21.2%至27.5%，在125瓦时为37.7%至49.7%，在55%最大强度时为42.9%至63.7%。VE的S₂w平均为6.8%，VO₂为4.3%，心率为3.2%，收缩压为7.3%，舒张压为10.5%。通过将受试者间变异除以总变异来计算稳定速率得分的可靠性系数。VE、VO₂和心率的可靠性相似，范围为r = 0.69至r = 0.97。收缩压和舒张压的可靠性较低，范围为r = 0.27至r = 0.80。总之，稳定速率通气、摄氧量和心率反应可靠且一致。血压的可靠性较低。这种低可靠性可能是由于每搏输出量或总外周阻力的变异性所致。
