There is another approach that allows a different pathway to connecting with the fine currents that move through spine and body.
Clap your hands three times and then rest them with palms up on the lap. Feel the reverberations in the hands that have just been activated. Close your eyes and continue to feel the vibrations as they begin to dissipate.
Notice what happens to your awareness as you focus on the vibrations in your hands. Notice and acknowledge to yourself that you have the ability to track and feel into sensations as they get more and more subtle.
As the sensations get softer and more subtle, notice that you can easily continue to maintain awareness of the vibrations indefinitely. You might also begin to notice the vibrations in adjacent areas of the wrist, forearm and upper arm.
When you are able to feel the subtle vibrations of adjacent areas, you will also begin to apprehend the connectivity of vibrations with the rest of the body…from hands to wrists, to forearms, arms, shoulders, etc. You will feel your whole body as a wave of vibration, like an underground reverberation!
Spend long periods of time basking in the subtle reverberations, the resonance of all that you feel! This is a delicate state of awareness but not difficult to experience.
I believe that it just requires a slight shift in approach when feeling into sensations: that there are no insignificant sensations! Any sensation, when followed to deeper and deeper subtlety, can be felt in relation to the vibrations of the other body parts…and ultimately as part of the overall resonance of the entire body!