New Multi-site PPG Dataset Released for Wearable Physiological Monitoring Research
A new physiological dataset, 'Multi-site PPG,' has been introduced to advance research in wearable health monitoring. This dataset addresses the current limitation of public photoplethysmography (PPG) datasets, which are largely wrist-centric or confined to short, controlled studies. Multi-site PPG was collected in real-world conditions from four custom-developed, unobtrusive wearable devices: a smart earring, ring, watch, and necklace. Each device recorded green and infrared reflective PPG, 3-axis acceleration, and temperature, with timestamps for cross-device alignment. A Polar H10 chest strap provided reference electrocardiogram (ECG) data. Participants wore these devices for one to multiple days during their normal daily routines, accumulating over 350 hours of raw data and 230–290 hours of preprocessed, modeling-ready data per wearable. Benchmarking of heart-rate estimation methods revealed substantial body-site differences, with the earring achieving the lowest mean absolute error (MAE) of 2.30 bpm, ...