Skip Navigation LinksHome > October 1996 - Volume 38 - Issue 10 > Effect of Overtime Work on 24-Hour Ambulatory Blood Pressure
Journal of Occupational & Environmental Medicine:
Original Article

Effect of Overtime Work on 24-Hour Ambulatory Blood Pressure

Hayashi, Takeshi MD; Kobayashi, Yasuki MD; Yamaoka, Kazue PhD; Yano, Eiji MD

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Abstract

Recently, the adverse effects of long working hours on the cardiovascular systems of workers in Japan, including "Karoshi" (death from overwork), have been the focus of social concern. However, conventional methods of health checkups are often unable to detect the early signs of such adverse effects. To evaluate the influence of overtime work on the cardiovascular system, we compared 24-hour blood pressure measurements among several groups of male white-collar workers. As a result, for those with normal blood pressure and those with mild hypertension, the 24-hour average blood pressure of the overtime groups was higher than that of the control groups; for those who periodically did overtime work, the 24-hour average blood pressure and heart rate during the busy period increased. These results indicate that the burden on the cardiovascular system of white-collar workers increases with overtime work.

© Williams & Wilkins 1996. All Rights Reserved.

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