Apple researchers unlock hidden heart data from Apple Watch sensor using AI

In the era of wearable technology, where a simple wristband can monitor steps, sleep, and even detect irregular heart rhythms, the Apple Watch stands as a beacon of innovation — blending sleek design with life-saving potential. Yet, beneath its optical heart sensor lies untapped power: photoplethysmography (PPG) signals that capture the subtle dance of blood flow through our veins. A groundbreaking new study from Apple researchers illuminates this frontier, revealing how artificial intell