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Understanding mind-body disciplines: A pilot study of paced breathing and dynamic muscle contraction on autonomic nervous system reactivity.

Michael S Chin, Stefanos N Kales

Stress and Health September 5, 2019 DOI: 10.1002/smi.2887 (opens in new tab)

Study at a glance

AI-extracted from the abstract
Characteristics Randomized controlled pilot study Peer reviewed
Population Male participants
Interventions Paced breathing alternating upper extremity muscle contractions paced breathing synchronized with alternating contractions
Measures heart rate variability
Topics Meditation
Keywords Parasympathetic nervous system Humans Electrocardiography Psychophysiology Pilot projects Stress, psychological Respiration Muscle contraction Adult Female Stress management Cardiovascular reactivity Respite/recovery resilience
Key points Paced breathing synchronized with rhythmic skeletal muscle contraction produced 150% higher parasympathetic activation than a control task during a cognitive stressor, and 45.9% higher than alternating contractions alone. Alternating contractions alone produced 71.7% higher activation than paced breathing alone. The authors conclude that combining paced breathing with rhythmic muscle contraction leads to more resilient parasympathetic response than either practice alone, which may help explain stress-reducing benefits of mind-body disciplines.

Abstract

Mind-body disciplines such as yoga, Tai Chi, and Qigong have been demonstrated to activate the parasympathetic nervous system, but it remains unclear how these practices 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: (a) paced breathing alone, (b) alternating upper extremity muscle contractions, (c) paced breathing synchronized with alternating contractions, or (d) a neutral control task. Autonomic response was assessed by heart rate variability during a standardized cognitive stressor. The alternating contraction group had 71.7% higher activation of parasympathetic signal over respiration alone (p < .001). Alternating contractions synchronized with breathing demonstrated 150% higher parasympathetic activation than control (p < .0001). Comparing the contraction alone and synchronized groups, the synchronized group demonstrated 45.9% higher parasympathetic response during a cognitive stressor (p < .001). In conclusion, paced breathing synchronized with rhythmic muscle contraction leads to more resilient activation of the parasympathetic response than either alternating contractions or breathing alone, which may help explain the stress reducing benefits of mind-body disciplines.

Comparable studies

Other randomized controlled trials on meditation, most cited first.

Study Year Design Participants
Alterations in Brain and Immune Function Produced by Mindfulness Meditation Healthy employees in a work environment 2003 Randomized controlled trial n = 41
Prevention of relapse/recurrence in major depression by mindfulness-based cognitive therapy. Recovered recurrently depressed patients 2000 Randomized controlled trial n = 145
Open hearts build lives: Positive emotions, induced through loving-kindness meditation, build consequential personal resources. Working adults 2008 Randomized controlled trial n = 139
Short-term meditation training improves attention and self-regulation Undergraduate Chinese students 2007 Randomized controlled trial n = 40
Mindfulness-Based Cognitive Therapy for Depression: Replication and Exploration of Differential Relapse Prevention Effects. Recovered recurrently depressed patients 2004 Randomized controlled trial n = 73

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