Excerpt From: http://astro-theology.net:
Kundalini Energy
Kundalini energy, known as Prana, Chi, and Ra-Sekhem, flows throughout thousands of “nadis” or energy channels. If any of the channels are blocked or over-sensitized, a disbalance can arise, causing illness in the mind and physical body.

There are three most important channels through which the Serpent Power flows. In India these are known as the Sushumna, Ida, and Pingala – Muata Ashby (Serpent Power) In ancient Egyptian mythology and yoga these two opposites are known as “Uadjit” and “Nekhebet” or Isis and Nephthys, or the “Two Ladies”…The serpents Uatchet and Nekhebet are equal to the Ida and Pingala respectively…They are both related to the left (lunar) and right (solar) nostrils…The interaction of these two forces…cause movements in the Life Force energy that is available to each living being and supports their practical existence in the physical realm – Muata Ashby (Serpent Power)

Cleansing Ritual (Misogi)
This is known in Sanskrit as the Bhuta Shudhi, in which the elements of the body are cleansed. The subtle body’s cleansing is called Nadi Shudhi. This process is known to take months, years, or even lifetimes.

~~~~ My Words: ~~~
Each Lifetime is a process in which we are here to clear the karmas of past lifetimes, in other words, clearing out negative energy that we have built-up through our past lives.

In Physical Reality, an example of Stuck Negative Energy would be Obesity… people consume too many calories (energy), so the energy builds up as fat because the energy has nowhere to go. Too much of this fat becomes useless and accumulates and causes health problems such as heart disease.

Energy is not a “magical” force, it just requires a different way of understanding the knowledge… Ancient Cultures had this knowledge, it was slowly eradicated with the rise of Christianity.