Walter M. Bortz II, MD is a Clinical Full Professor of Medicine at Stanford University School of Medicine. His history of service includes former seats as Co-Chairman of the American Medical Association’s Task Force on Aging and former President of The American Geriatric Society. Widely recognized as one of America’s most distinguished scientific experts on aging and longevity, he has published 150+ peer-reviewed medical articles and authored numerous books, including We Live Too Short and Die Too Long, Dare to Be 100, Living Longer for Dummies, Diabetes Danger, and Next Medicine. He is currently working on his latest book, Aging is Negotiable. He is a compulsively reliable blogger each week for the Huffington Post. Dr. Bortz is 86 years old, still runs up to 18 miles per week, and encourages everyone at any age to stay engaged and keep moving!