Influence of Facial Immersion with Breathing on Autonomic Nerve Activity Ryosuke Okano 1 1Hokuriku Institute of Wellness and Sports Science Keyword: 自律神経活動 , 顔面浸水 , カテコラミン , autonomic nerve activity , facial immersion , catecholamine pp.77-82
Published Date 1999/1/15
DOI https://doi.org/10.11477/mf.1404901833
  • Abstract
  • Look Inside

This study investigated variations in autonomic nerve activity during and after facial immersion breathing through a snorkel (FIBS) in water at 5℃. Fourteen healthy adults of both genders served as subjects. Elec-trocardiogram, catecholamine (CA). and blood pressure were measured during rest, FIBS, and recovery. After analysis of successive RR intervals using methods in-cluding fast Fourier transformation, CVRR, MSD, RR50, and LogHF were used as indices of cardiac vagus nerve activity, and LF/HF was used as an index of cardiac sympathetic nerve activity. MSD, RR50, LogHF, nor-adrenaline, systolic blood pressure (SBP), and diastolic blood pressure (DBP) increased significantly during FIBS. In contrast, CVRR, MSD, RR50, LogHF, adrenaline, SBP, and DBP decreased but LF/HF in-creased significantly during recovery. From these results, it was suggested that cardiac vagus and sympa-thetic nerve activities were accelerated simultaneously during FIBS, and both activities were depressed during recovery. However, because the correlation between the variations of LF/HF and CA was low, further study is indicated.

Copyright © 1999, Igaku-Shoin Ltd. All rights reserved.


電子版ISSN 1882-1200 印刷版ISSN 0452-3458 医学書院