Cardiovascular Reactivity to Mental Stress: Relationship with Menstrual Cycle and Gender

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概要

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• The purpose of the present study was to determine the fluctuation in cardiovascular reactivity to mental stress during the menstrual cycle by comparing heart rate variability (HRV), and other physiological and psychological data in females with those in males. Cardiovascular reactivity to two mental tasks was measured in 14 females during the follicular and luteal phase of menstruation over two menstrual cycles. The same tasks were subsequently given to a matched pair of males (N=14), at the same intervals as their corresponding females. Heart rate, blood pressure and HRV were used as indices of cardiovascular reactivity. Subjective mental workload was measured at the end of each task. Power spectral analysis of HRV showed that the high frequency (HF) component in HRV decreased more during the luteal phase than the follicular phase. The low frequency (LF) component in HRV and the LF/HF ratio in the luteal phase were significantly higher than that in the follicular phase. The LF component and the LF/HF ratio were significantly lower in females than in males; conversely, the HF component was significantly higher in females than in males. Neither significant effects of menstrual cycle, gender and mental stress nor any significant interactions were found for mental workload. These findings indicate that sympathetic nervous activity in the luteal phase is significantly greater than in the follicular phase whereas parasympathetic nervous activity is predominant in the follicular phase. The results also suggest that predominance of sympathetic nervous activity in males compared with a dominant parasympathetic nervous activity in females.

• 日本生理人類学会の論文

著者

• Sato Nozomi

  Department Of Mechanical Engineering School Of Science & Engineering Kinki University

• Sato Nozomi

  近畿大学 理工学部機械工学科

• Miyake Shinji

  Department of Environmental Management II, School of Health Sciences, University of Occupational and

• Miyake Shinji

  産業医科大学 産業保健学部

• Miyake Shinji

  Department Of Environmental Management Ii School Of Health Sciences University Of Occupational And E

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