-The Activity Log featured above, was inpired by a book titled The Step Diet by James O. Hill, PH.D., John C. Peters, Ph.D., with Bonnie T. Jortberg, M.S.,R.D., available at Amazon and other stores. My study and work regarding weight management and the concept of energy balance has led me to many books, articles, and refernces in exercise science. The Step Diet is one reference which is practical and easy to understand.