The book "Heart rate and type of regulation in children, adolescents and athletes", written by a team of authors, is a unique and in-depth study devoted to one of the most pressing topics in the field of medicine and sports science. This work will be a real discovery for doctors, teachers, coaches and anyone interested in the health and physical development of children and adolescents. Heart rate is not just a biological parameter, but an important indicator of the state of the body, especially in growing and actively developing people. The book examines various aspects related to heart rhythm, including its dynamics, the effect of physical activity and emotional states on the regulation of the cardiovascular system. The authors focus on how the heart rate changes depending on age, level of physical activity and individual characteristics of the body. This makes the book especially valuable for parents who want to better understand how to take care of their children's health, as well as for coaches seeking to optimize the training process. The book will be of interest not only to specialists in the field of medicine and sports, but also to a wide range of readers, including students of medical and sports universities, as well as everyone who cares about their health and the health of their loved ones. It is suitable for both professionals and amateurs who want to deepen their knowledge of the physiology and psychology of children and adolescents. The topics raised in the book cover a wide range of issues, from the physiological features of the cardiovascular system in children to the effect of stress and emotional state on heart rate. The authors emphasize the importance of an individual approach to each child and teenager, given their unique characteristics and needs. This makes the book particularly relevant in light of current trends towards a personalized approach in medicine and sports. The style of the authors is characterized by scientific rigor and accessibility of the presentation, which allows readers to easily assimilate complex concepts and apply them in practice. Each section of the book is illustrated with relevant research and examples, which makes the material not only theoretically sound, but also practically useful. The team of authors includes leading specialists in the field of cardiology, pediatrics and sports medicine, which guarantees high quality of the presented material. The book "Heart rate and type of regulation in children, adolescents and athletes" will be an indispensable tool for anyone who wants to deepen their knowledge about the health and physical development of the younger generation. It will help parents, coaches and doctors better understand how to respond to changes in heart rate and how to maintain the health of children and adolescents at a high level. If you are looking for literature on children's health, sports medicine or cardiology, this book should definitely take its rightful place in your library. It will not only become a source of knowledge, but also a practical guide that will help you in your professional activities or in everyday life. Do not miss the opportunity to discover a world in which the health and physical activity of children and adolescents become a priority, and understanding their heart rate is the key to a successful and harmonious life.