Last Updated on February 4, 2023 by pg@petergamma.org Finger plethysmography devices are used for clinical and research applications for non-sporting acitvies. Since many years years now, sports sensor manufacturers offer sports watches with PPG sensors which several optical PPG sensors. We do not know of scientific studies for clinical and research applications for non-sports activities, … Continue reading Criticism about sports sensor manufacturers who sell optical heart rate monitor watches