Zahi Fayad practices what he preaches. As a professor of radiology and director of the biomedical engineering and imaging institute at Mount Sinai, Fayad is leading a study investigating how our health data can be put to better use to help us live healthier, and by extension, longer. At his lab in New York City, he recently showed off his current go-to digital health devices (which rotate as new gadgets become available): an Oura Ring and a Garmin watch. He also uses an ECG strap to measure his