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 …

The number of publications investigating heart rate variability (HRV) in psychiatry and the
behavioral sciences has increased markedly in the last decade. In addition to the significant …

The aim of this systematic review was to explore studies regarding association between
occupational stress and heart rate variability (HRV) during work. We searched PubMed …

Spectral analysis of heart rate variability (HRV) is a valuable tool for the assessment of
cardiovascular autonomic function. Fast Fourier transform and autoregressive based …

College can be a time of immense stress. Mindfulness meditation has been shown to be an
effective stress management technique. A significant limitation of the mindfulness literature …

Background Photoplethysmography is a noninvasive and low-cost method to remotely and
continuously track vital signs. The Oura Ring is a compact photoplethysmography-based …

Heart rate variability (HRV), the beat-to-beat variation in either heart rate or the duration of
the RR interval, has become a popular clinical and investigational tool (Task Force of the …

Heart rate variability (HRV) represents fluctuations in the time intervals between successive
heartbeats, which are termed interbeat intervals. HRV is an emergent property of complex …

Background and objective Heart rate variability (HRV) has been proposed as a useful
marker that can show the performance adaptation and optimize the training process in elite …

Urbanisation and global ageing are both accelerating, posing older people's mental and
cardiovascular health at risk. A growing number of studies suggests beneficial health effects …