The Science
Vagus Nerve
Activity can predict chronic diseases and unhealthy lifestyle choices in general.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6210465/
Vagus Nerve as Modulator of the Brain–Gut Axis in Psychiatric and Inflammatory Disorders. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5859128/
The vagus nerve and the inflammatory reflex—linking immunity and metabolism –https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4082307/
Vagus nerve stimulation: indications and limitations –https://pubmed.ncbi.nlm.nih.gov/17691314/
A review of vagus nerve stimulation as a therapeutic intervention – https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5961632/
Chronic fatigue syndrome from vagus nerve infection: a psychoneuroimmunological hypothesis – https://pubmed.ncbi.nlm.nih.gov/23790471/
How positive emotions build physical health: perceived positive social connections account for the upward spiral between positive emotions and vagal tone – https://pubmed.ncbi.nlm.nih.gov/23649562/
Heart Rate Variability
Heart Rate Variability Synchronizes When Non-experts Vocalize Together – https://pubmed.ncbi.nlm.nih.gov/19853714/
Heart rate variability in obesity and the effect of weight loss – https://pubmed.ncbi.nlm.nih.gov/10215292/
Heart rate variability. Applications in psychiatry https://pubmed.ncbi.nlm.nih.gov/19853714/
High heart rate variability a major factor in longevity https://pubmed.ncbi.nlm.nih.gov/20381674/
Music structure determines heart rate variability of singers – https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3705176/
Progressive Muscle Relaxation & Breathwork
The effectiveness of progressive muscle relaxation and interactive guided imagery as a pain-reducing intervention in advanced cancer patients: A multicentre randomised controlled non-pharmacological trial – https://pubmed.ncbi.nlm.nih.gov/30712739/
Effects of progressive muscle relaxation combined with music on stress, fatigue, and coping styles among intensive care nurses – https://pubmed.ncbi.nlm.nih.gov/31371164/
Progressive muscle relaxation shows statistically significant improvement in sleep quality and generalized anxiety in COVID-19 patients https://pubmed.ncbi.nlm.nih.gov/33217826/
Diaphragmic breathing improves heart rate variability and glycemic index in patients with ischemic heart disease and diabetes https://pubmed.ncbi.nlm.nih.gov/19629309/
Diaphragmic breathing reduces anxiety levels in randomized, controlled trial https://pubmed.ncbi.nlm.nih.gov/27553981/
Self induced tremoring increased perceptions of quality of life among caregivers in South Africa https://pubmed.ncbi.nlm.nih.gov/25568824/
Increase in pain threshold and decrease in negative feelings for participants engaged in both relaxation practices and diaphragmic breathing https://pubmed.ncbi.nlm.nih.gov/21939499/
