title: [Circadian rhythm and stress in the elderly: a study using salivary cortisol levels as an indicator].
abstract: Biological response to stress was studied in the healthy elderly by fluctuations of their circadian rhythms using salivary cortisol levels as an indicator. Social activities per se may not be stressors, but may serve as a "eustress" to the elderly when they are in good health because their rhythm is maintained. Concerning the occupations of the subjects, the rhythms of elderly watchmen showed no disturbance when they slept for three hours between 23:00 and 2:00. However, those who were unable to sleep showed disturbed rhythms. We concluded that disturbance of a rhythm that has been established on the basis of being active during the day time and sleeping at night could be a stressor to the elderly rather than stress due to working as a guard.
authors.forename: S
authors.initials: S
authors.lastname: Fujibayashi
authors.forename: A
authors.initials: A
authors.lastname: Koizumi
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D002940:Circadian Rhythm / Q000502:physiology*; D005260:Female; D006801:Humans; D006854:Hydrocortisone / Q000032:analysis*; D008297:Male; D008875:Middle Aged; D012463:Saliva / Q000032:analysis*; D013312:Stress, Physiological / Q000503:physiopathology*; D014940:Work Schedule Tolerance / Q000502:physiology
chemical_list: D006854:Hydrocortisone