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 …

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 …

Introduction: Heart Rate Variability (HRV) and Pulse Rate Variability (PRV), are non-invasive
techniques for monitoring changes in the cardiac cycle. Both techniques have been used for …

Heart rate variability (HRV) is a measurement of the fluctuation of time between each
heartbeat and reflects the function of the autonomic nervous system. HRV is an important …

Heart rate variability (HRV) is an accepted method for determining autonomic nervous
system activity and cardiovascular risk in various populations. This study assessed the …

Human subjects were exposed for 3 h in a climate chamber to the air temperature of 35° C
that is an action level, at which the working time needs to be diminished in China. The …

Real-time monitoring and evaluation of cognitive performance based on physiological
indicators is a potentially new measure to ensure high air temperature safety. Heart rate …

High temperatures are one of the main causes of work safety accidents associated with
cognitive impairment. However, the effects of elevated ambient temperature on cognitive …

Recently, studies suggest that the average indoor temperature is typically> 30° C and that
the maximum temperature can reach 37.5° C in hot‐humid areas. However, the effects …

In this study, we examined the cognitive performance of subtropically acclimatized subjects
at an extreme high indoor temperature and the effect of decreased humidity on the cognitive …