It's time to turn back the clock! In 20 YEARS YOUNGER, Bob Greene offers readers a practical, science-based plan for looking and feeling their best as they age. The cutting-edge program is built around four essential pillars: exercise, nutrition, skincare, and sleep. The book details easy and effective steps we can all take to rebuild the foundation of youth, enjoy better health, improve energy, control stress, and have a more positive outlook. Woven through the text is advice on customizing an exercise plan, creating the best sleep environment, staying mentally sharp, navigating medical tests, and much more. Readers will gain a greater understanding of how the body ages and what they can do to feel--and look--20 years younger.