Joining Dr. Michelle Robin on Small Changes Big Shifts is  author, speaker and host Dr. James L. Marcum a board-certified cardiologist practicing with the Chattanooga Heart Institute, and named by USA Today as one of the most influential physicians in his field. Dr. Marcum is the author of The Ultimate Prescription and Medicines That Kill, He is also as an in-demand speaker for his role as the director of Heartwise Ministries. Also on the show is Dr. Andi Selby an Osteopathic Physician practicing primary care at Shawnee Mission Medical Center’s new Leawood, Kansas facility.  Dr. Selby focuses on diet and exercise as the way to have a healthier and happier life. She’ll explain how much and what type of exercise is best.