The book is dedicated to the medical and biological direction of training qualified athletes. The purpose and objectives of modern sports medicine are defined, the unified focus of the sports-pedagogical and medical-biological components of the training process is emphasized; It is indicated that comprehensive training should be based on the laws of development and adaptation of the human body. The actually working laws of adaptation of the human body are described, a number of options for constructing the training process are presented, which largely determine both the conditions of existence and the features of the development and adaptation processes of athletes. The essence and mechanisms of using the laser stimulation method in the complex training of qualified athletes, as well as the laser therapy method in the treatment of a number of diseases that occur in athletes are revealed. For sports doctors, coaches, elite sports specialists. The book was published in the author's edition.