St-Onge Maxime, Mignault Diane, Allison David B, Rabasa-Lhoret Rémi
Metabolic Dysfunction Laboratory, Nutrition Department, University of Montreal, Montreal, Canada.
Am J Clin Nutr. 2007 Mar;85(3):742-9. doi: 10.1093/ajcn/85.3.742.
Increasing daily energy expenditure (EE) plays an important role in the prevention or treatment of several lifestyle-related diseases; however, its measurement remains problematic.
The objective was to evaluate a portable armband device for measuring daily and physical activity EE compared with doubly labeled water (DLW) in free-living individuals.
Daily EE and physical activity EE were measured in 45 subjects over a 10-d period simultaneously with 2 techniques: a portable armband and DLW. Resting metabolic rate was measured by indirect calorimetry, and the thermic effect of a meal was estimated (10% of daily EE). Physical activity EE was obtained by subtracting the values for resting metabolic rate and thermic effect of a meal measured with DLW from those measured with the armband. Body composition was measured with dual-energy X-ray absorptiometry. Concordance between measures was evaluated by intraclass correlation, SEE, regression analysis, and Bland-Altman plots.
Mean estimated daily EE measured with the armband was 117 kcal/d lower (2375 +/- 366 kcal/d) than that measured with DLW (2492 +/- 444 kcal/d; P < 0.01). Despite this group difference, individual comparisons between the armband and DLW were close, as evidenced by an intraclass correlation of 0.81 (P < 0.01).
The portable armband shows reasonable concordance with DLW for measuring daily EE in free-living adults. The armband may therefore be useful to estimate daily EE.
增加每日能量消耗（EE）在预防或治疗多种与生活方式相关的疾病中起着重要作用；然而，其测量仍存在问题。
目的是评估一种便携式臂带设备在自由生活个体中测量每日和身体活动EE的情况，并与双标水（DLW）法进行比较。
在45名受试者中，采用两种技术在10天内同时测量每日EE和身体活动EE：便携式臂带和DLW法。静息代谢率通过间接测热法测量，膳食热效应进行估算（占每日EE的10%）。身体活动EE通过用臂带测量的值减去用DLW法测量的静息代谢率和膳食热效应的值获得。身体成分用双能X线吸收法测量。通过组内相关、SEE、回归分析和Bland-Altman图评估测量结果之间的一致性。
用臂带测量的平均每日EE估计值比用DLW法测量的低117千卡/天（2375±366千卡/天对2492±444千卡/天；P<0.01）。尽管存在组间差异，但臂带和DLW法的个体比较结果相近，组内相关系数为0.81（P<0.01）证明了这一点。
便携式臂带在测量自由生活成年人的每日EE方面与DLW法显示出合理的一致性。因此，该臂带可能有助于估计每日EE。
