The purpose of this book is to teach us how to use structural muscular integration in all physical aspects of biological sustainability at the human body level. The concept of biological sustainability is perhaps the most pressing issue that the human species is currently facing, throughout its existence.  For the longest period of time, the human species has adapted to an environment completely different from the one we live in today. We evolved in a world where primary biological adaptations were in line with the environment in which we live. At some point in our existence, we lived as a tribal civilization that survived by gathering earth's fruits and hunting animals for food, while competing with other species for survival.   According to evidence provided by anthropologists and archaeologists, 2,500,000 years ago man began to manufacture primitive tools to hunt and scavenge for food, and 300,000 years ago, man began to use fire to warm himself and to cook his food. These discoveries have produced adaptations in the evolution of the species by influencing the diet, but these changes have been gradual and slow, causing very few negative effects. In any case, nowadays, changes in the environment and society in which we live, are much faster and have negative and disastrous physiological consequences for the human body. Looking back about 150 years ago, the industrial era was beginning to expand. This revolution created an environment and a culture different from anything we had encountered so far.   Making a rough comparison, the "old people" ran barefoot through forests and savannas after game, threw sticks, stones and later spears, with a precision that no other mammal is even today capable of, they climbed trees to pick the freshest fruits or to escape with their lives from larger and more dangerous predators, Which means that they responded to stress with body movement (they fought or ran).   Modern man confronts some rapid and dramatic changes, instead of eating freshly picked food, he rather eats industrially processed food, instead of exercising to get food, he rather opens the refrigerator door and serves according to his cravings, instead of responding to daily stress (including the one at the office) with movement, he rather responds by standing still or sitting, in a deficient position.