About the book: 2011 / In order to maintain youth for many years, you must first of all take care of good spirits and high efficiency of mental activity. Anyone who feels cheerful and strong stays young longer - today this is a scientifically proven fact. The human brain and his thinking abilities need constant training no less than the muscles of his body. The general condition of the body depends on how well the brain functions. From this book you will learn how to prolong the youth of your brain using simple, effective exercises. You can significantly influence your mental abilities by making very minor adjustments to your lifestyle and making it a habit to regularly train your brain with simple exercises..