https://time.com/collections/life-reinvented/5494363/sleep-artificial-intelligence/ https://cdn.jwplayer.com/v2/media/EE7iJwKQ/poster.jpg?width=720 How Sleep Loss Affects Your Heart Sleeping for five hours a night alters your heart rate the next day https://cdn.jwplayer.com/manifests/EE7iJwKQ.m3u8 https://cdn.jwplayer.com/previews/EE7iJwKQ 56 2016-07-07T20:09:45+00:00 no no