Walter M. Bortz II, M.D., is a Clinical Professor of Medicine at Stanford University School of Medicine and a graduate of Williams College and the University of Pennsylvania School of Medicine. Recognized as one of America’s most distinguished scientific experts on aging and longevity. Dr. Walter Bortz's research has focused on the importance of physical exercise in the promotion of robust aging. Dr. Bortz has published over 130 medical articles and authored numerous books, including We Live Too Short and Die Too Long, Dare to Be 100, Living Longer for Dummies, Roadmap to 100, and Diabetes Danger. In 2010 he wrote Next Medicine (Oxford Univ. Press) and in 2011 he wrote Occupy Medicine (Amazon) Dr. Bortz is past co-chairman of the American Medical Association’s Task Force on Aging, former President of The American Geriatric Society, and is currently Chairman of the Medical Advisory Board for the Diabetes Research and Wellness Foundation. He is married with 4 children and 9 grandchildren. On April 15, 2013 at age 83 he will run the Boston Marathon which will be his 43rd consecutive annual marathon.