The vagus or “wandering” nerve is the main branch of the parasympathetic nervous system
(PNS), innervating most internal organs crucial for health. Activity of the vagus nerve can be …

Psychological stress is a well-established risk factor for cardiovascular disease (CVD). Heart
rate variability (HRV)-biofeedback could significantly reduce stress levels and improve …

Introduction Dietary oligosaccharides can impact the gut microbiota and confer tremendous
health benefits. Objectives The aim of this study was to determine the impact of a novel …

Objectives Total knee arthroplasty (TKA) is one of the most common joint surgeries, with
over a million procedures performed annually in the US. Over 70% of patients report …

The value of heart rate variability (HRV) in the fields of health, disease, and exercise science
has been established through numerous investigations. The typical mobile-based HRV …

Introduction Long COVID (LC), also known as post-COVID-19 syndrome, refers to symptoms
persisting 12 weeks after COVID-19 infection. It affects up to one in seven people contracting …

Heart Rate Variability (HRV) Biofeedback (BFB) has been shown to improve autonomic
balance and wellbeing in chronic diseases. As cardiac variability represents an index of …

Fatigue is a major symptom in many diseases, often among the most common and severe
ones and may last for an extremely long period. Chronic fatigue impacts quality of life …

Objective In this study, our goal was to understand the comparative impact of humming,
physical activity, emotional stress, and sleep on several heart rate variability (HRV) …

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 …