Wilmore J H, Stanforth P R, Turley K R, Gagnon J, Daw E W, Leon A S, Rao D C, Skinner J S, Bouchard C
The University of Texas at Austin, 78712, USA.
Med Sci Sports Exerc. 1998 Feb;30(2):259-65. doi: 10.1097/00005768-199802000-00014.
This study determined the reproducibility of cardiovascular, respiratory, and metabolic responses to submaximal cycle ergometer exercise at two power outputs (50 W and 60% VO2max) on each of two separate days in a sample of 390 subjects (198 men and 192 women) participating in the HERITAGE Family Study. The same protocol was conducted across 3 d in an intracenter quality control substudy which included an additional 55 subjects. Reproducibility estimates included technical error, coefficient of variation, and intraclass correlation for each of the selected variables for both subject populations. Further, since the data were collected across four clinical centers, intraclass correlations were also computed separately by clinical center. Most variables were highly reproducible, with coefficients of variation below 9% and intraclass correlations over 0.80. These results were consistent for both subject populations and across all four clinical centers. Reproducibility indicators were generally better at the higher power output. It is concluded that within-subject day-to-day variation and measurement unreliabilities are generally small compared with the between-subject variance in the response to submaximal exercise at each of the clinical centers of the HERITAGE Family Study.
本研究确定了在HERITAGE家庭研究的390名受试者（198名男性和192名女性）样本中，在两天的每一天，以两种功率输出（50瓦和60%最大摄氧量）进行次极量蹬车运动时，心血管、呼吸和代谢反应的可重复性。在一项中心内质量控制子研究中，对另外55名受试者在3天内采用了相同的方案。可重复性估计包括两个受试人群中每个选定变量的技术误差、变异系数和组内相关性。此外，由于数据是在四个临床中心收集的，组内相关性也按临床中心分别计算。大多数变量具有高度可重复性，变异系数低于9%，组内相关性超过0.80。这些结果在两个受试人群和所有四个临床中心都是一致的。在较高功率输出时，可重复性指标通常更好。得出的结论是，与HERITAGE家庭研究各临床中心次极量运动反应的受试者间差异相比，受试者内的每日变化和测量不可靠性通常较小。
