The energy body has been described in countless metaphysical models, and has a few footholds in modern medicine as well, at least insofar as the body clearly utilizes electrical signals in its functioning. Whether you believe in soul or brainwaves, the idea of the body expressing pure energy is not really an esoteric suggestion, as many scientists today happily admit that “everything is energy”.
At this time, however, the idea that we can engage with our own energy body and manipulate aspects of it, both subtly and dramatically, is firmly placed in the realm of metaphysics. To me, addressing both the energetic and the physical body equally only makes sense. After all, describing our thoughts (of which our lives are infinitely dependent upon) purely in terms of particles and matter is impossible. There is electricity dancing through your brain. We are both particle and wave.
How you interact with that energy depends on your metaphysical beliefs and paradigms. But I would advocate that everyone develop some kind of theory for engaging with energy – at least to maintain a little energy-body-hygiene. This could be meditating, yoga, Reiki, shamanism…the list of available options is impressive.
If I were to give a simple exercise that would be reasonable for most people, regardless of their metaphysical bent, I would say this:
Everything about relationships with energy, matter, and the infinite is about give and take. So just stop for a moment. Inhale slowly and say “Thank you”. If you like, you can imagine yourself receiving any sort of energy or (even just oxygen) from the universe around you. Then exhale slowly and say “Bless you.” Be honestly grateful. Give out your breath and if you like, your best ideas of blessings and energetic exchange. Now you’re breathing and exchanging energy with the Infinite. If you do it for five minutes it feels pretty good, too.