環境変化に敏感な性格傾向を持つ執務者の日中の活動•夜間の睡眠についての検討: サーカディアンリズムを考慮したオフィスの温熱環境制御が執務者の深部体温とその他生理•心理•作業効率に与える影響 その2

摘要

This study investigated the effect of diurnal thermal changes on the circadian rhythm of human core body temperature, together with secondary effects on other psycho-physiological states. Four male subjects were observed under two experimental temperature cycles in a climate chamber. In Case1，the temperature remained fixed at 25℃ (control); in Case 2， a constant temperature of 25℃ during the morning was raised to 28℃ at noon and remained constant during the afternoon and evening, to reflect the normal circadian increase in core body temperature (CBT) in the afternoon. The rectal temperature (RT) of each subject was monitored to evaluate the effect of the chamber temperature on the circadian rhythm of his core body temperature. Heart rate variability (HRV) and wrist activity were continuously monitored by electrocardiographs and wrist sensors. Subjective sleep quality was assessed just after awakening by a self-rating sleep questionnaire. For all subjects, Case 2 produced an afternoon RT significantly higher than Case1.This and previous experiments indicate that controlling the thermal environment may increase the amplitude or advance the phase of the RT circadian rhythm, and can also affect the circadian rhythm of HRV. However, this experiment also indicated that changes in RT and HRV circadian rhythms due to varying the diurnal thermal environment may have little effect on the subjective quality of sleep.%オフィスにおける日中の温熱環境制御が執務者の深部体温のサーカディアンリズムに与える影響と、その時に生じる心理•生理及びパフォーマンスの変化を検討することを目的とした被験者実験を、環境変化に比較的敏感であると判断できた人多く採用して実施し、主に以下の知見を得た。