Understanding Mind-Body Disciplines: A Pilot Study of Breathing and Dynamic Muscle Contraction on Autonomic Nervous System Reactivity.

Michael S Chin, S. Kales
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引用次数: 12

Abstract

Mind-body disciplines such as Yoga, Tai Chi, and Qigong have been demonstrated to activate the parasympathetic nervous system, but it remains unclear exactly how these activities achieve these results, whether by breathing, movement, or some combination. This pilot study establishes a model to examine the individual and combined effects of paced breathing and rhythmic skeletal muscle contraction on the activation of the parasympathetic system during a cognitive stressor. Male participants were randomly assigned to one of four preconditioning groups: 1) rhythmic breathing alone, 2) alternating upper extremity muscle contractions, 3) combined rhythmic breathing with alternating contractions, or a 4) neutral control task. Autonomic response was assessed by heart rate variability during the standardized cognitive stressor. The alternating contraction group had a 71.7% higher activation of parasympathetic signal over respiration alone (p<0.001). Alternating contractions synchronized with breathing demonstrated a 150% higher parasympathetic activation than control (p<0.0001). Between contraction alone and combined contraction groups, the combined group demonstrated 45.9% higher parasympathetic response during a cognitive stressor (p<0.001). In conclusion, breathing combined with rhythmic muscle contraction led to greater activation of the parasympathetic response than either alternating contractions or breathing alone, which may help explain the stress reducing benefits of mind-body disciplines.
理解身心学科:自主神经系统反应中呼吸和动态肌肉收缩的初步研究。
身心训练,如瑜伽、太极和气功已经被证明可以激活副交感神经系统,但这些活动究竟是如何达到这些效果的,是通过呼吸、运动还是某种组合,目前还不清楚。本初步研究建立了一个模型,以检查在认知应激源时,有节奏的呼吸和有节奏的骨骼肌收缩对副交感神经系统激活的个体和联合影响。男性参与者被随机分配到四个预处理组中的一个:1)单独有节奏呼吸,2)上肢肌肉交替收缩,3)有节奏呼吸与交替收缩相结合,或4)中性控制任务。在标准化认知应激过程中,通过心率变异性评估自主神经反应。交替收缩组副交感神经信号的激活比单独呼吸组高71.7% (p<0.001)。与呼吸同步的交替收缩显示副交感神经激活比对照组高150% (p<0.0001)。在单独收缩组和联合收缩组之间,联合组在认知应激源时副交感神经反应高45.9% (p<0.001)。总之,呼吸与有节奏的肌肉收缩相结合,比交替收缩或单独呼吸更能激活副交感神经反应,这可能有助于解释身心训练减轻压力的好处。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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