""Keeping Fit"" is a self-help book written by Orison Swett Marden that focuses on the importance of maintaining physical fitness and overall health. The book offers practical advice and tips on how to improve one's health through exercise, nutrition, and positive thinking. It covers a range of topics, including the benefits of regular exercise, the importance of a balanced diet, and the role of mental attitude in achieving optimal health. Marden also provides motivational stories and examples of successful individuals who have maintained their health and fitness throughout their lives. This book is an excellent resource for anyone looking to improve their overall well-being and lead a healthier lifestyle.1914. When the body is in superb physical condition, it stimulates the mind and develops its maximum of the force that creates, that accomplishes. When the body is down the mind is down, all life's standards are down, and the whole nature is demoralized. Contents: keeping fit; miracle of food; what to eat; vegetable of mixed diet, which? nature's own food; how food affects character; culinary crimes; appetite and joy in eating; overeating; eating for efficiency; foods, fads and habits; fatigue poison; how nature mothers us; what to eat after fifty; masterfulness and the great out doors.