In this book, the reader will find a new approach to improving health. This approach is called "sanomechanics", from the Latin sanus (healthy) and mechanicus (science of the motion of bodies subjected to forces). The focus of sanomechanics is on exercising with an understanding of the biomechanical consequences of one's movements. Based on the theory of the floating skeleton, which postulates a hydraulic connection between synovial joints, the theory explains the greater or lesser success of any exercise, appealing to the ability of the human skeleton to absorb and transform forces and moments from the body segments and the environment. This ability vanishes with age and illness; and the deeper our understanding of the nature of how our skeleton functions, the better we will be able to improve, protect, and prolong our skeleton's health.