Healthy biological systems exhibit complex patterns of variability that can be described by
mathematical chaos. Heart rate variability (HRV) consists of changes in the time intervals …

Objective Physical or mental imbalance caused by harmful stimuli can induce stress to
maintain homeostasis. During chronic stress, the sympathetic nervous system is …

Psychophysiological research integrating heart rate variability (HRV) has increased during
the last two decades, particularly given the fact that HRV is able to index cardiac vagal tone …

Heart rate variability (HRV), the change in the time intervals between adjacent heartbeats, is
an emergent property of interdependent regulatory systems that operate on different time …

The close relationship between hypertension and dietary sodium intake is widely
recognized and supported by several studies. A reduction in dietary sodium not only …

The use of heart rate variability (HRV) in research has been greatly popularized over the
past decades due to the ease and affordability of HRV collection, coupled with its clinical …

Background: The psycho-physiological changes in brain-body interaction observed in most
of meditative and relaxing practices rely on voluntary slowing down of breath frequency …

The polyvagal theory introduced a new perspective relating autonomic function to behavior,
that included an appreciation of the autonomic nervous system as a “system,” the …

Heart rate variability, the change in the time intervals between adjacent heartbeats, is an
emergent property of interdependent regulatory systems that operates on different time …

Kubios HRV is an advanced and easy to use software for heart rate variability (HRV)
analysis. The software supports several input data formats for electrocardiogram (ECG) data …