Wickel Eric E, Welk Gregory J, Eisenmann Joey C
Department of Health and Human Performance, Iowa State University, Ames, IA, USA.
Med Sci Sports Exerc. 2006 Feb;38(2):373-9. doi: 10.1249/01.mss.0000183344.46077.bb.
This study was conducted to examine the relationships between the Bouchard activity diary and a temporally matched objective measure: the Tritrac-R3D (Professional Products, Reining International, Madison, WI) accelerometer. A secondary purpose was to examine the intraindividual variability in correlation coefficients between the two temporally matched measures.
A total of 70 participants (ages 18-23 yr) wore a Tritrac monitor and completed the Bouchard activity diary during a 24-h period. Estimates of activity energy expenditure (AEE) and total energy expenditure (TEE) were compared using correlations, t-tests, and Bland-Altman graphical procedures.
A strong linear relationship was found between the Tritrac and the Bouchard measure for both AEE (r = 0.72) and TEE (r = 0.86). Large and significant differences were seen in the estimates of AEE (576 +/- 381 kcal) and TEE (645 +/- 494) from the two instruments. The Bouchard diary yielded higher estimates of TEE than the Tritrac for nearly all participants (97%) and the Bland-Altman plots revealed a systematic bias in the relationships (smaller bias for lower energy expenditure levels and higher bias for higher energy expenditure estimates). Intraindividual correlations between estimated TEE from the Tritrac and Bouchard diary ranged from 0.34 to 0.93 (mean r = 0.74).
The overall response indicates that individuals are able to provide reasonable self-reported estimates of their activity levels across a day.
本研究旨在检验布沙尔活动日记与时间匹配的客观测量工具：Tritrac-R3D（专业产品公司，Reining International，麦迪逊，威斯康星州）加速度计之间的关系。第二个目的是检验这两种时间匹配测量工具之间相关系数的个体内变异性。
共有70名参与者（年龄18 - 23岁）在24小时内佩戴Tritrac监测器并完成布沙尔活动日记。使用相关性分析、t检验和布兰德 - 奥特曼图形法比较活动能量消耗（AEE）和总能量消耗（TEE）的估计值。
Tritrac与布沙尔测量工具在AEE（r = 0.72）和TEE（r = 0.86）方面均呈现出强线性关系。两种仪器对AEE（576 +/- 381千卡）和TEE（645 +/- 494）的估计存在显著差异。几乎所有参与者（97%）的布沙尔日记得出的TEE估计值高于Tritrac，布兰德 - 奥特曼图显示两者关系存在系统偏差（能量消耗水平较低时偏差较小，能量消耗估计值较高时偏差较大）。Tritrac和布沙尔日记估计的TEE之间的个体内相关性范围为0.34至0.93（平均r = 0.74）。
总体结果表明，个体能够对其一天中的活动水平提供合理的自我报告估计。
