I am a personal trainer and was actually introduced to the book when one of my elderly clients brought it to me and asked me to help her learn and remember the exercises. I was totally impressed with the program and bought the book for myself.I have since incorporated this program into training with most of my clients. I haven't found anyone, yet, who cannot benefit from at least some part of The Core Program.What a well written book!! I'm excited to see what her new book holds in store!