New Delhi, Aug. 16 -- On most mornings, your fitness tracker greets you with a string of numbers - steps taken, hours slept, heart rate, maybe a "sleep score" out of 100. But what if those numbers came with the kind of nuanced, tailored advice you'd expect from a personal coach who knows the science inside out? That's the vision behind PH-LLM, a new AI system unveiled by Google researchers in 2024. In a study published in the journal Nature Medicine on Thursday, the company's researchers reported that its personal health coaching can interpret wearable device data and match - or even surpass - human experts in sleep and fitness advice. The system, called the Personal Health Large Language Model (PH-LLM), is a fine-tuned version of Google's ...