Mass times almost 90 billion equals energy. In any units, that has to be a lot of energy. Matter is just one of the patterns that energy follows. Things are made out of energy. Everything that has mass has energy.
Air has mass.
Therefore, air has energy. There are many forms of energy. It would be a tremendous leap, and a reinterpretation of standard physics, to say that the energy in mass is available to be used as the type of energy that gets you through the day. Nevertheless, I think that there is a lot of energy available for personal use. When I was much younger, I used to get tired a lot, and feel like I did not have enough energy.