In college, Olivia Walch was a self-described "sleep deprivation cowboy." She would go days with only 3 to 4 hours of sleep and then binge sleep at other times. But soon, it all caught up with her. Now, she's a sleep researcher at the University of Michigan with a simple message: Sleep regularity is key — as is darkness. She joins host Maiken Scott to discuss her new book "Sleep Groove: Why Your Body's Clock Is So Messed Up And What to Do About It."<br><br>Learn more about sponsor message choices: <a href="https://podcastchoices.com/adchoices">podcastchoices.com/adchoices</a><br><br><a href="https://www.npr.org/about-npr/179878450/privacy-policy">NPR Privacy Policy</a>

Exposure

Go on an adventure into unexpected corners of the health and science world each week with award-winning host Maiken Scott. The Pulse takes you behind the doors of operating rooms, into the lab with some of the world's foremost scientists, and back in time to explore life-changing innovations. The Pulse delivers stories in ways that matter to you, and answers questions you never knew you had.