Livingstone M B, Prentice A M, Coward W A, Ceesay S M, Strain J J, McKenna P G, Nevin G B, Barker M E, Hickey R J
Biomedical Sciences Research Centre, University of Ulster at Jordanstown, County Antrim, Northern Ireland, UK.
Am J Clin Nutr. 1990 Jul;52(1):59-65. doi: 10.1093/ajcn/52.1.59.
Total energy expenditure (TEE) was measured simultaneously in 14 free-living adults over 15 d by the doubly labeled water (DLW) method and for 2-4 separate days by heart-rate (HR) monitoring. Individual curves for HR vs oxygen consumption (VO2) were obtained and an HR (FLEX HR: 97 +/- 8 beats/min, range 84-113 beats/min) that discriminated between rest and activity was identified. Calibration curves were used to assign an energy value to daytime HR above FLEX HR. Below FLEX HR energy expenditure was taken as resting metabolism. Sleeping energy expenditure was assumed to be equal to basal metabolic rate. Average HR TEE (12.99 +/- 3.83 MJ/d) and average DLW TEE (12.89 +/- 3.80 MJ/d) were similar. HR TEE discrepancies ranged from -22.2% to +52.1%, with nine values lying within +/- 10% of DLW TEE estimates. The FLEX HR method provides a close estimation of the TEE of population groups. However, an increased number of sampling days may improve the precision of individual estimates of TEE.
通过双标水（DLW）法在15天内同时测量了14名自由生活成年人的总能量消耗（TEE），并通过心率（HR）监测在2 - 4个独立的日子里进行了测量。获得了心率与耗氧量（VO2）的个体曲线，并确定了区分休息和活动的心率（FLEX HR：97±8次/分钟，范围84 - 113次/分钟）。校准曲线用于为高于FLEX HR的白天心率分配能量值。低于FLEX HR时，能量消耗被视为静息代谢。睡眠能量消耗被假定等于基础代谢率。平均心率TEE（12.99±3.83兆焦/天）和平均双标水TEE（12.89±3.80兆焦/天）相似。心率TEE差异范围为 - 22.2%至 + 52.1%，其中九个值在双标水TEE估计值的±10%范围内。FLEX HR方法能对人群组的TEE进行近似估计。然而，增加采样天数可能会提高个体TEE估计的精度。
