On the Mayo Clinic Radio podcast, Dr. Michael Joyner, an anesthesiologist and human performance expert at Mayo Clinic, discusses the most recent exercise guidelines and ways to get people moving. Dr. Joyner also discuss eselite athlete performance and the possibility of someone running a marathon in under two hours. Also on the podcast, Dr. Minetta Liu, an oncologist at Mayo Clinic, explains how liquid biopsy may individualize cancer treatments. And Dr. P James Dyck, a neurologist at Mayo Clinic, discusses Guillain-Barré syndrome.