期刊
RESPIRATORY PHYSIOLOGY & NEUROBIOLOGY
卷 305, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.resp.2022.103943
关键词
Symbolic dynamics; Nonlinear analysis; Respiratory sinus arrhythmia; Autonomic nervous system; Heart rate variability; Sports medicine
资金
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo, Brazil (FAPESP) [2016/22215-7, 2017/13402-0, 2018/11123-0, 2020/15769-1]
- Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior, Brazil (CAPES) [001]
This study assessed the cardiovascular dynamics and cardiorespiratory coupling (CRC) during postural challenge in athletes and non-athletes using joint symbolic analysis (JSA). The JSA analysis identified higher CRC strength at rest in athletes and a more reactive autonomic control in athletes during postural challenge, indicating the presence of nonlinear components in the relationship between heart period and respiratory movements.
Purpose: Despite the relevant presence of nonlinear components on heart period (HP) likely due to cardiorespiratory coupling (CRC), the HP is frequently analyzed in absence of concomitant recordings of respiratory movements (RESP). This study aims to assess the cardiovascular dynamics and CRC during postural challenge in athletes and non-athletes via joint symbolic analysis (JSA). Methods: A cross-sectional study was conducted in 50 men, aged between 20 and 40 yrs, divided into athletes (n = 25) and non-athletes (n = 25) groups. The electrocardiogram, blood pressure and RESP signals were recorded during 15 min in both supine position (REST) and after active postural maneuver (STAND). From the beat-to-beat series of HP, systolic arterial pressure (SAP) and RESP, we computed the time and frequency domain indexes and baroreflex sensitivity. The JSA was based on the definition of symbolic HP and RESP patterns and on the evaluation of the rate of their simultaneous occurrence in both HP and RESP series. Results: The JSA analysis was able to identify higher CRC strength at REST in athletes. Moreover, the response of CRC to STAND depended on the time scales of the analysis and was much more evident in athletes than in non -athletes, thus indicating a more reactive autonomic control in athletes. Conclusion: Assessing CRC in athletes via JSA provides additional information compared to standard linear time and frequency domain tools likely due to the more relevant presence of nonlinearities in HP-RESP variability relationship.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据