Effects of trunk posture on cardiovascular and autonomic nervous systems: A pilot study

Abstract

Objective: Although regular and moderate physical activity has been shown to improve the cardiovascular and autonomic nervous systems, little has been done to study the effects of postural changes in the movement on the heart and autonomic nervous system. To uncover changes in cardiac function and autonomic nerves induced by different underlying posture transitions and explore which trunk postures lead to chronic sympathetic activation. Therefore, this study investigated the effects of trunk posture on the cardiovascular and autonomic nervous systems.Methods: Twelve male subjects (age 24.7 ± 1.3) underwent this study. The non-invasive cardiac output NICOM monitoring equipment and the FIRSTBEAT system are used to dynamically monitor seven trunk postures in the sitting position simultaneously (neutral position, posterior extension, forward flexion, left lateral flexion, right lateral flexion, left rotation, right rotation). Each posture was maintained for 3 min, and the interval between each movement was 3 min to ensure that each index returned to the baseline level. Repeated analysis of variance test was used to compare and analyze the differences in human cardiac function, heart rate variability index, and respiratory rate under different postures.Results: Compared with the related indicators of cardiac output in a neutral trunk position: the cardiac index (CI) was significantly reduced in forwarding flexion and left rotation (3.48 ± 0.34 vs. 3.21 ± 0.50; 3.48 ± 0.34 vs. 3.21 ± 0.46, Δ L/(min/m2)) (p = 0.016, p = 0.013), cardiac output decreased significantly (6.49 ± 0.78 vs. 5.93 ± 0.90; 6.49 ± 0.78 vs. 6.00 ± 0.96, Δ L/min) (p = 0.006, p = 0.014), the stroke volume (stroke volume)decreased significantly (87.90 ± 15.10 vs. 81.04 ± 16.35; 87.90 ± 15.10 vs. 79.24 ± 16.83, Δ ml/beat) (p = 0.017, p = 0.0003); heart rate increased significantly in posterior extension (75.08 ± 10.43 vs. 78.42 ± 10.18, Δ beat/min) (p = 0.001); left rotation stroke volume index (SVI) decreased significantly (47.28 ± 7.97 vs. 46.14 ± 8.06, Δ ml/m2) (p = 0.0003); in the analysis of HRV-related indicators, compared with the neutral trunk position, the LF/HF of the posterior extension was significantly increased (1.90 ± 1.38 vs. 3.00 ± 1.17, p = 0.037), and the LF/HF of the forward flexion was significantly increased (1.90 ± 1.38 vs. 2.85 ± 1.41, p = 0.041), and the frequency-domain index LF/HF of right rotation was significantly increased (1.90 ± 1.38 vs. 4.06 ± 2.19, p = 0.008). There was no significant difference in respiratory rate (p > 0.05).Conclusion: A neutral trunk is the best resting position, and deviations from a neutral trunk position can affect the cardiovascular and autonomic nervous systems, resulting in decreased stroke volume, increased heart rate, and relative activation of sympathetic tone.

Impact of Semi-Fowler's Position in Chronic Heart Failure (CHF) Patients: Scoping Review

“…In general, body position significantly relate to human cardio and respiration through several physiological pathway. First explanation involving trunk posture on cardiovascular and automic system (Wang et al, 2022). The observation showed on several trunk positions (Sato & Tudella, 2018).…”

“…In adults standing, a normal hydrostatic pressure of 94 mmHg is measured from a vein in the leg. In another study, it was stated that the neutral trunk position is the best resting condition because it affects the cardiovascular and autonomic nervous systems to decrease the volume of a cup, increase pulse, and activate sympathetic Sarah (Martin-Du Pan et al, 2004;Wang et al, 2022). The neutral trunk position is when the spine The neutral trunk is the best resting position, and deviations from the neutral trunk position can affect the cardiovascular and autonomic nervous systems, resulting in a decrease in the volume of a cup, an increase in heart rate, and the relative activation of sympathetic tone.…”

Cardiovascular response of students to physical exertion using the 'Trunk Flexion Test'

“…The importance of choosing an appropriate test to evaluate trunk characteristics is emphasized in the study by Martínez-Romero [27]. Among many studies [19,27,28], tests using various trunk positions are the most accessible method for assessing CVSR under load. The body of research on trunk flexion and extension provides important insights for spine health and functionality [16,18,20,28].…”

“…Among many studies [19,27,28], tests using various trunk positions are the most accessible method for assessing CVSR under load. The body of research on trunk flexion and extension provides important insights for spine health and functionality [16,18,20,28].…”

Profil Hemodinamik pada Soccer Pria Pra Lanjut Usia Selama Masa Latihan High Intensity Interval Training (HIIT)

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