A Unified System Fitness Design proposes a new fitness framework that encompasses all fitness indicators in a holistic and comprehensive manner, striving to provide a comprehensive and inclusive definition of physical fitness, one that considers all attributes contributing to overall well-being, crafting a flexible framework that can adapt to diverse contexts and purposes of physical fitness assessments. This new book is divided into two parts. Part 1 explores redefining and reconstructing the concepts of an inclusive and holistic fitness framework. In Part 2, the reader is encouraged to embark on a journey to discover the interconnected system functions of physiological health, homeostasis, motor control, and energy regulation. Part 3 reinforces the role of wellness in the Unified Systems Fitness Design, guided by the principles of inclusion and equity, in the decision-making process. Finally, the perpetual complementation theory emerged from the design, making sense of the
