心拍数と三次元身体加速度によるストレスに関する基礎研究

概要

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The present study is aimed to be the fundamental study on the quantification of stress, examining the relationship between heart rate (HR) and 3-dimensional body accelerations (ACC). HR and 3-dimensional (x-y-z) ACC were simultaneously measured by the Activetracer[○!R] and the actions were recorded by a voice recorder. After the exercise intensity was calculated from maximum HR and resting HR based on the Karvonen formula, the relationship between the exercise intensity and the body ACC was investigated. In order to examine mental state (relax or tension), the frequency components which correspond to indices of sympathetic or parasympathetic nervous activities were calculated by spectrum analysis of HR fluctuations. Though the exercise intensity and ACC both increased with hard exercises, the exercise intensity which had large variance of z-ACC tended to be high compared with small variance of z-ACC in spite of same baseline ACC level. Thus, the exercise intensity may be influenced with z-ACC. Meanwhile, parasympathetic nerve activity decreased with undergoing mental stress. Therefore, the spectrum analysis could be significant method to evaluate mental stress. In future study, further measurement under variable actions, environments and human ages are required to investigate relationship between HR and ACC in detail.
函館工業高等専門学校の論文