Different effects of inspiratory duration and expiratory duration on heart rate deceleration capacity and heart rate asymmetry.

ABSTRACT:

Purpose

Low values of heart rate deceleration capacity (DC) and heart rate asymmetry (HRA) are associated with cardiovascular risks. Slow respiration has been proven to enhance the magnitudes of these indexes, but individual inspiratory (T_I) and expiratory (T_E) durations were not controlled in most studies. This study aims to examine whether the effects of T_I and T_E on these indexes would be the same and, if not, how to adjust T_I and T_E to maximize the effect of slow respiration.

Methods

We evaluated 14 seated healthy young adults who randomly controlled their breathing to nine combinations of T_I and T_E, each chosen respectively from 2, 4, and 6 s. A 5-min R-R interval time series was obt

SUBMITTER: Wang YP 

PROVIDER: S-EPMC11199285 | biostudies-literature | 2024 Jul

REPOSITORIES: biostudies-literature