基于心率的新陈代谢率预测模型研究
Metabolic rate prediction model based on heart rates
摘要：
为验证ISO 8996:2004标准中心率预测代谢率模型的准确性，通过间接测热法测量了89名20~30岁的办公人员在平躺、静坐及2、3、4、5、6 km/h走步活动下的代谢率和心率。采用逐步回归的方法，基于储备心率建立了代谢率预测方程，并通过代谢率预测值和实测值对比了2种预测方法的优劣。结果表明， ISO 8996:2004模型在预测代谢率时误差较大（21%），不适用于中国人代谢率的预测；基于储备心率的预测方程精度较高，比ISO 8996:2004模型的准确性整体上提高了11%，单个活动预测准确性提高了2%~26%。
Abstract：
In order to validate the accuracy of the analytical method for estimating metabolic rate in ISO 8996:2004, indirect calorimetry is used to measure metabolic rate and heart rate of 89 office workers aged 20-30 years under lying down, sitting still, and walking activities of 2, 3, 4, 5, 6 km/h. Based on reserved heart rate, the metabolic rate prediction equation is established by stepwise regression. The advantages and disadvantages of two prediction methods are compared by predicted and measured values of metabolic rate. The results show that, the equation in ISO 8996:2004 is not suitable for Chinese because of a large error (21%) in prediction of metabolic rate. The prediction equation based on reserved heart rate is more accurate, with an overall accuracy of 11% higher than the ISO 8996:2004 method, and the prediction accuracy of individual activities is also improved by 2%-26%.
Keywords:metabolic rate; heart rate; physical activity; indirect calorimetry; stepwise regression