Reliability and validity of the combined heart rate and movement sensor Actiheart
Reliability and validity of the combined heart rate and movement sensor Actiheart
复制标题
DOI：
10.1038/sj.ejcn.1602118
复制
发表时间：
2005-04-01
影响因子：
4.7
通讯作者：
Wareham, NJ
中科院分区：
文献类型：
--
作者：
Brage, S;Brage, N;Wareham, NJ
准确量化体力活动能量消耗是了解能量代谢紊乱的关键部分。动态心动仪是一种结合心率和运动的传感器，旨在评估人群中的体力活动。目的：在机械环境以及行走和跑步过程中，检查动态心的可靠性和有效性。方法：在8个动心单元中，技术可靠性(变异系数，CV)和运动有效性分别用正弦加速度(0.1-20m/S(2))和模拟R波脉冲(25-250bpm)进行评估。在静息和平板运动(3.2-12.1公里/小时)时，心动与心电图的一致性被确定。11名男性和9名女性(26-50岁，20-29 kg/m(2))用间接量热法评估步行和跑步强度(J/min/kg)，并根据运动、HR和运动+HR进行多元线性回归，调整性别。结果：仪器内运动和HR的中位数CV分别为0.5%和0.03%。相应的器械间变异系数分别为5.7和0.03%，运动有一定的异方差。运动与加速度之间存在较强的线性关系(R2=0.99，P40.84，P
Accurate quantification of physical activity energy expenditure is a key part of the effort to understand disorders of energy metabolism. The Actiheart, a combined heart rate (HR) and movement sensor, is designed to assess physical activity in populations.Objective: To examine aspects of Actiheart reliability and validity in mechanical settings and during walking and running.Methods: In eight Actiheart units, technical reliability ( coefficients of variation, CV) and validity for movement were assessed with sinusoid accelerations (0.1-20 m/s(2)) and for HR by simulated R-wave impulses (25-250 bpm). Agreement between Actiheart and ECG was determined during rest and treadmill locomotion (3.2-12.1 km/h). Walking and running intensity (in J/min/kg) was assessed with indirect calorimetry in 11 men and nine women (26-50y, 20-29 kg/m(2)) and modelled from movement, HR, and movement+HR by multiple linear regression, adjusting for sex.Results: Median intrainstrument CV was 0.5 and 0.03% for movement and HR, respectively. Corresponding interinstrument CV values were 5.7 and 0.03% with some evidence of heteroscedasticity for movement. The linear relationship between movement and acceleration was strong (R-2=0.99, P40.84, P