When we talk about energy, we are referring to biological energy: the energy generated by cells through the combustion process. Although it is not the same thing, we can compare this process to lighting a fire: a fuel and a combustion agent, wood and air, are needed. In the case of cells, these would be oxygen and nutrients. In the same way that the fire lights up more when we fan it, if we fan the lungs, the cells will produce more energy. How much more? The difference can be enormous.

Cells produce a type of molecule called ATP. These molecules are responsible for storing and releasing energy as the body needs it. They are like a telephone battery: they charge and store energy, which is consumed as the body needs it. When a cell receives oxygen, it can produce up to thirty-two ATP molecules with one molecule of glucose, i.e. nutrients. Without oxygen, it produces only two. But not only oxygen produces combustion: a good elimination of carbon dioxide is also needed. If we go back to the image of lighting a fire, it means having a good chimney to release the combustion gases. If the carbon dioxide is not eliminated, the fire suffocates and, in a similar way, our cells suffocate as the blood acidifies. This is why training breathing techniques is so efficient in producing cellular energy.

Extending the scientific definition, we can consider as biological energy any energy of nature that manifests itself in the body. For example, heat is a biological manifestation of thermal energy: where there is heat, there is energy. Electromagnetism is also a form of energy that we encounter; our nervous system transmits electrical impulses. In all cases, these are energies that have their physical laws and that our body, like all living beings, generates, stores and uses for all its biological processes.