Manoush Zomorodi, host of NPR's "TED Radio Hour" and a new limited run podcast series "Body Electric" and Keith Diaz , a certified exercise physiologist and the director of the Exercise Testing Laboratory at Columbia University Medical Center, talk about the new podcast that explores the ways our technologies, from the chair to the PC, have changed our bodies and how to participate in a study to determine how much movement is needed to offset the effects of too much sitting.→For more information about Body Electric and how to participate in the experiment, go to npr.org/bodyelectric.