edededed,
Sorry I did not make it clearer.
First you start with vital breathing, which is the same as bone breathing used in many systems. This is where you imagine light coming in through the pores of the skin on the inhale from around you into the lower dan tien. On the exhale, the energy goes back out again.
You do this for awhile and then at the end of either the inhale or exhale hold your breath for a few seconds. At this point you will feel the astral energy manifest as I described above.
Now you breath this different energy in via the pores in your skin into and out of the solar plexus area.
I originally learned the 5 element meditations from a Taoist system, but my teacher never taught me how to band the energy or utilize it with movement. The end stage meditations were very similar to those in the 4 element system I use now however.
If someone wants to use the five element form they would need to research where the energies band within the body. Additionally they would need to figure out the sounds and other characteristics to the system. I imagine the matching three energies between the system would be the same, but I have no idea how it will work with wood and metal. I do think metal would have a light/floating sensation like air however.
The elemental energies can be used for a variety of purposes. I've personally been on the receiving end from three different teachers who could use the elements to flavor fah jing and they had no relationship with each other. Two used the five element system and one used the four element system.
Some sources indicate that if you generate the elemental energies from the internal organs and use this for fah jing that you need to do this selectively as over use is bad for your health.
With my current system I do not think we have this limitation, but then again my empty hand skills are pretty basic. I largely use it as a demo for prospective students and with another student who can issue fah jing it can be used to reinforce the health of both practitioners. Although in this case the energy is used in a very soft manner for obvious reasons. And no, testicle jing is not what I most often use. I largely work with kidney and liver jing in those cases.
Cheers,
Peacedog