Background: A growing number of wearable devices claim to provide accurate, cheap and
easily applicable heart rate variability (HRV) indices. This is mainly accomplished by using …

Background Advancements in wearable technology have provided practitioners and
researchers with the ability to conveniently measure various health and/or fitness indices …

Heart rate variability has been largely used for the assessment of cardiac autonomic activity,
due to the direct relationship between cardiac rhythm and the activity of the sympathetic and …

The understanding of heart rate variability (HRV) has increased parallel with the
development of modern physiology. Discovered probably first in 1847 by Ludwig, clinical …

Heart rate variability (HRV) is a non-invasive indicator of autonomic nervous system
function. HRV recordings show artefacts due to technical and/or biological issues. The …

Heart rate variability (HRV) is commonly used to assess autonomic functions and responses
to environmental stimuli. It is usually derived from electrocardiographic signals; however, in …

Many people experience mild stress in modern society which raises the need for an
improved understanding of psychophysiological responses to stressors. Heart rate variability …

Accurate measures of heart rate (HR) during rehabilitation and sporting activities are
important for precise exercise prescription to maintain or increase capacity. Wrist-worn …

Low values on heart rate variability (HRV) derived parameters at resting have been used to
predict cardiovascular diseases (CVD) and mortality. In this regard, short-term HRV …

Heart rate variability (HRV) measurements via ambulatory monitors have become common.
We examined the validity of recording RR intervals using the Polar V800™ compared to 12 …