The Body at Work: A Treatise on the Principles of Physiology is a research book written by renowned physiology researcher, Alex Hill. In his book, the author examines the principles of functioning of the human body during its activity at work. He examines the impact of physical and emotional performance on various body systems, explains how work affects health and the general condition of a person. Using available scientific information and the results of his own research, Hill offers a unique approach to understanding the relationship between physical activity and the functioning of the body. This book will be useful for everyone who is interested in physiology, medicine and a healthy lifestyle.