Anastasiades P, Johnston D W
University of Oxford.
Psychophysiology. 1990 Jan;27(1):87-93. doi: 10.1111/j.1469-8986.1990.tb02184.x.
A simple activity measure based on the EMG recorded from the thigh was developed to monitor the physical activity of ambulatory subjects. The performance of this activity measure was assessed during four major physical activities: running, walking, standing, and sitting. Heart rate was also monitored. The results were analysed within individuals using time series analysis. The heart rate and activity series (of consecutive 30-s means) required similar models within individuals, and both measures differentiated among running, walking, and non-movement. The activity measure did not discriminate between postures. This measure covaried closely with heart rate and emerged as a necessary and relatively more significant predictor of heart rate variance than knowledge of the type of physical activity the subjects were undertaking. Posture, however, did add a significant and independent contribution to heart rate variance. This activity measure appears to be a simple, reliable, and valuable method of measurement of physical activity variations in ambulatory subjects.
基于从大腿记录的肌电图开发了一种简单的活动测量方法，用于监测非卧床受试者的身体活动。在四项主要身体活动（跑步、行走、站立和坐着）期间评估了这种活动测量方法的性能。同时也监测了心率。使用时间序列分析在个体内部对结果进行了分析。个体内心率和活动序列（连续30秒的平均值）需要相似的模型，并且这两种测量方法在跑步、行走和不活动之间存在差异。活动测量方法无法区分姿势。该测量方法与心率密切相关，并且与受试者所进行的身体活动类型的知识相比，它成为心率变异性的必要且相对更重要的预测指标。然而，姿势确实对心率变异性有显著且独立的贡献。这种活动测量方法似乎是一种简单、可靠且有价值的测量非卧床受试者身体活动变化的方法。
