Moon J K, Butte N F
United States Department of Agriculture/Agricultural Research Service, Houston, Texas, USA.
J Appl Physiol (1985). 1996 Oct;81(4):1754-61. doi: 10.1152/jappl.1996.81.4.1754.
Oxygen consumption (VO2) and carbon dioxide production (VCO2) rates were measured by electronically recording heart rate (HR) and physical activity (PA). Mean daily VO2 and VCO2 measurements by HR and PA were validated in adults (n = 10 women and 10 men) with room calorimeters. Thirteen linear and nonlinear functions of HR alone and HR combined with PA were tested as models of 24-h VO2 and VCO2. Mean sleep VO2 and VCO2 were similar to basal metabolic rates and were accurately estimated from HR alone [respective mean errors were -0.2 +/- 0.8 (SD) and -0.4 +/- 0.6%]. The range of prediction errors for 24-h VO2 and VCO2 was smallest for a model that used PA to assign HR for each minute to separate active and inactive curves (VO2, -3.3 +/- 3.5%; VCO2, -4.6 +/- 3%). There were no significant correlations between VO2 or VCO2 errors and subject age, weight, fat mass, ration of daily to basal energy expenditure rate, or fitness. VO2, VCO2, and energy expenditure recorded for 3 free-living days were 5.6 +/- 0.9 ml.min-1.kg-1, 4.7 +/- 0.8 ml. min-1.kg-1, and 7.8 +/- 1.6 kJ/min, respectively. Combined HR and PA measured 24-h VO2 and VCO2 with a precision similar to alternative methods.
通过电子记录心率（HR）和身体活动（PA）来测量耗氧率（VO₂）和二氧化碳产生率（VCO₂）。通过心率和身体活动对成年人（10名女性和10名男性）进行的每日平均VO₂和VCO₂测量结果，已使用房间热量计进行了验证。单独的心率以及心率与身体活动相结合的13种线性和非线性函数，作为24小时VO₂和VCO₂的模型进行了测试。平均睡眠VO₂和VCO₂与基础代谢率相似，并且仅通过心率就能准确估算（各自的平均误差分别为-0.2±0.8（标准差）和-0.4±0.6%）。对于使用身体活动将每分钟的心率分配到单独的活动曲线和非活动曲线的模型，24小时VO₂和VCO₂的预测误差范围最小（VO₂，-3.3±3.5%；VCO₂，-4.6±3%）。VO₂或VCO₂误差与受试者年龄、体重、脂肪量、每日能量消耗率与基础能量消耗率的比值或健康状况之间无显著相关性。在3个自由生活日记录的VO₂、VCO₂和能量消耗分别为5.6±0.9 ml·min⁻¹·kg⁻¹、4.7±0.8 ml·min⁻¹·kg⁻¹和7.8±1.6 kJ/min。心率与身体活动相结合测量24小时VO₂和VCO₂的精度与其他方法相似。
