EFFECTS OF RAPID ROUND TRIPS AGAINST TIME DISPLACEMENT ON ADRENAL CORTICAL-MEDULLARY CIRCADIAN-RHYTHMS

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  • 1 January 1976
    • journal article
    • research article
    • Vol. 47  (10) , 1101-1106
Abstract
The effects of rapid round trips against time displacement on circadian rhythms was investigated. A healthy physician was studied on 3 east-west trips (Tokyo-San Francisco-Tokyo) of short and prolonged stays. The control study was performed on a north-south trip (Tokyo-Sydney-Tokyo) which had practically no time displacement. The circadian rhythms of urinary 17-OHCS [17-hydroxycorticosteroids], 17-KS [17-ketosteroids] and noradrenaline excretions and plasma cortisol in short-stay trips were disrupted and not synchronized; however, the recovery was rapid with the circadian rhythms returning to normal within 1 to 2 days. The circadian rhythms of these variables in the control study were not disrupted. A short, overnight stay during the trip may minimize the ill effects due to time displacement.