This book consists of four parts. The first part introduces Federick Matthias Alexander and his research achievements. The second part tells the structure and function of human body, and introduces how to practice the restraint and guidance principle of Alexander's skills in daily life. The third part involves daily activities such as sitting, lying, writing and running. You are encouraged to use Alexander fitness skills to correct these applications. The last part of this book broadens your horizons by introducing the relevant knowledge and methods of using autonomous control skills in some specific situations.