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 details easy and effective steps we can all take to rebuild the foundation of youth and enjoy better health, improved energy, and a positive outlook on life. The four cornerstones of the program are: an exercise regimen for fighting muscle and bone loss, a longevity-focused diet, sleep rejuvenation, and wrinkle-fighting skin care. Woven throughout the text is practical advice on changing appearances, controlling stress, staying mentally sharp, navigating medical tests, and much more. Readers will walk away with a greater understanding of how the body ages and what they can do to feel-and look-20 years younger.