The purpose of this third book is to expand on one of the habits developed in the first "Food as Medicine." It highlights the close relationship between physical exercise and the group of interrelated systems that are extremely important in improving our physical health and that of our backs in general. As well as showing all the supplementation products that have helped me at some stages and developing the importance of adequate and sufficient rest. In the first book, the development of the relationship between the nervous system and the muscles is made. But over the years I have come to understand the importance and close health relationship between the different systems that make up our The respiratory system, the digestive system, the muscles, and the endocrine system. This led me to take new steps in my level of well-being and the health of my back. We have always considered the muscle as the support of the skeleton and as a dynamic element that favors movement, but the reality is that it is that and much more. The muscle is also an endocrine organ that can help you release the necessary chemistry to prevent the collapse and decline of your body.