2023 Volume 31 Issue 4 Pages 504-509
The photoplethysmogram is recorded non-invasively and continuously, serving as a key biological indicator for haemodynamic and autonomic regulatory functions. It's vital for assessing stress through evaluating autonomic functions. This study investigated short-term measurements using a wearable photoplethysmography device in daily scenarios and long-term measurements using a commercially available activity tracker (smartwatch). Short-term data revealed differences in stress levels through Poincaré plots of instantaneous pulse intervals. Long-term data showed variations in instantaneous pulse intervals due to differences in lifestyle, suggesting the potential to predict such variations from average pulse interval data.
