Graduate School of Sport Sciences, Waseda University, 2-579-15 Mikajima, Tokorozawa-city, Saitama 359-1192, Japan.
Faculty of Sport Sciences, Waseda University, 2-579-15 Mikajima, Tokorozawa-city, Saitama 359-1192, Japan.
Respir Physiol Neurobiol. 2022 Sep;303:103918. doi: 10.1016/j.resp.2022.103918. Epub 2022 May 10.
This study investigated the effects of lung volume and trigeminal nerve stimulation (TS) on diving responses in breath-hold divers (BHDs) and non-divers (NDs).
Eight BHDs and nine NDs performed four breath-hold trials at different lung volumes, with or without TS, and one trial of TS. Haemodynamic parameters and electrocardiograms were measured for each trial.
During the TS trial, the total peripheral resistance increased more in BHDs. Breath-hold performed at total lung capacity showed a more pronounced decrease in stroke volume and cardiac output in BHDs. The decrease in heart rate and increase in total peripheral resistance were more pronounced in BHDs when breath-holding was performed with TS.
The more pronounced diving response in BHDs was attributed to the greater increase in total peripheral resistance caused by TS. Furthermore, the lower stroke volume and cardiac output in BH performed at total lung capacity could also cause a more pronounced diving response in BHDs.
本研究旨在探讨肺容量和三叉神经刺激（TS）对屏气潜水员（BHD）和非潜水员（ND）潜水反应的影响。
8 名 BHD 和 9 名 NDs 在不同肺容量下进行了四次屏气试验，其中包括或不包括 TS，以及一次 TS 试验。对每次试验都测量了血流动力学参数和心电图。
在 TS 试验中，BHD 的总外周阻力增加更多。在 BHD 中，在肺总量下进行的屏气试验显示，心输出量和每搏输出量的下降更为明显。当进行 TS 时，BHD 的心率下降和总外周阻力增加更为明显。
BHD 更明显的潜水反应归因于 TS 引起的总外周阻力增加。此外，在肺总量下进行的 BH 的每搏输出量和心输出量较低也可能导致 BHD 更明显的潜水反应。
