Autonomic Nervous Activities Assessed by Heart Rate Variability in Pre- and Post-adolescent Japanese

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概要

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• There are many studies with respect to the age-related change of the characteristics of beat-to-beat heart rate variability (HRV), reflected by cardiac autonomic control, especially focusing on adulthood (i.e., aging related to the incidence of metabolic syndrome) in Japanese individuals. However, it is not still clear how basic control matures during childhood. This study was, therefore, designed to explore the HRV characteristics of pre- and post-adolescent Japanese, in a cross-sectional manner. Resting HRV data was recorded in a relaxing supine position from 136 healthy individuals between 8 and 20 years (48 boys between 8 and 14 years; 88 girls between 8 and 20 years) who were instructed to breathe periodically (0.25Hz). Frequency-domain analysis (i.e., the spectral analysis based on an autoregressive model) of short-term, stationary R-R intervals was performed to evaluate the low- (LF; below 0.15Hz) and high- (HF; 0.15-0.40Hz) frequency powers. The HF to total power represents the vagal control of heart rate (PNS indicator), and the ratio of LF to HF (LF/HF) is considered to relate to the sympathetic modulations (SNS indicator). Both PNS and SNS indices had substantially no effect from age and/or gender in the range between 8 and 20 years. In conclusion, the control of the cardiac autonomic nervous system in Japanese seems already to be compatible with that in adulthood before approximately 10 years. In other word, the cardiac autonomic modulation would presumably be maturated before the age of approximately 7-8 years, though further research is awaited.

著者

• Miura Akira

  Department of 2nd Cardiology, Wakayama Medical Center

• Fukuba Yoshiyuki

  Department of Exercise Science and Physiology, School of Health Sciences, Prefectural University of

• Sato Hironori

  Tsukuba Wellness Research

• Sakiyama Tomomi

  Department of Exercise Science and Physiology, School of Health Sciences, Prefectural University of

• Yamaoka(Endo) Masako

  Department of Exercise Science and Physiology, School of Health Sciences, Prefectural University of

• Yamada Masako

  Department of Exercise Science and Physiology, School of Health Sciences, Prefectural University of

• Ueoka Hatsumi

  Yasuda Women's University

• Koga Shunsaku

  Kobe Design University

• Ueoka Hatsumi

  Department Of Exercise Science And Physiology School Of Health Sciences Prefectural University Of Hi

• Miura A

  Department Of Exercise Science And Physiology School Of Health Sciences Prefectural University Of Hi

• Sakiyama Tomomi

  Department Of Exercise Science And Physiology School Of Health Sciences Prefectural University Of Hi

• Miura Akira

  Yokogawa Electric Corporation

• Miura Akira

  Department Of 2nd Cardiology Wakayama Medical Center

• Yamada Masako

  Department Of Exercise Science And Physiology School Of Health Sciences Prefectural University Of Hi

• Fukuba Yoshiyuki

  Department Of Exercise Science And Physiology School Of Health Sciences Prefectural University Of Hi

• Fukuba Yoshiyuki

  Research Institute For Radiational Biology And Medicine Hiroshima University

• Fukuba Yoshiyuki

  Department Of Exercise Science And Physiology School Of Health Sciences Hiroshima Women's Unive

• Fukuba Yoshiyuki

  Faculty Of Engileeering University Of Hiroshima

• Yamada Masako

  Department Of Earth And Space Science Osaka University

• Koga S

  Kobe Design University

• Kuno Shin-ya

  Tsukuba Wellness Res.

• Miura Akira

  Hiroshima Women's University

• Fukuoka Yoshiyuki

  Prefectural University Of Kumamoto Masahiro Itoh Kumamoto University

• Sato Hironori

  Tsukuba Wellness Res. Co Ltd.

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