In part four: host Manoush Zomorodi explores the connection between our posture and our mood. A lot of us associate our neck and back pain with spending hours hunched over our phones and laptops. But what if that hunched posture is also making us feel tired, stressed, and anxious? Neuroscientist Peter Strick discusses his groundbreaking research on why exercising our core muscles lowers our stress.Also in this episode: how a faulty, incorrect study went viral — claiming smartphones were causing people to grow horns on their backs. Science journalist Nsikan Akpan sets the record straight. Later, writer Paul Ingraham shares his daily strategy for doing movement snacks and strength building while balancing deadlines.Click here to find out more about the project: npr.org/bodyelectricAre you signed up for Columbia's study, or following along with the series? We want to hear from you! Send us a voice memo at bodyelectric@npr.org. Talk to us on Instagram @ManoushZ, and on Facebook @tedradiohour.