Most lower back pain that people tend to suffer from is basically a defense mechanism called Protective Muscle Spasm. A spastic muscle is a muscle which was forced to contract and lost its ability to stretch.
A spastic muscle resists being exercised, stretched or massaged because these activities will over-stimulate the central nervous system.
Muscle spasm could be activated by overuse, overstreching, or sudden trauma like a fall, car accident or being hit by an object.
"When the hips are not level, the body's center of gravity is thrown off, causing the spinal muscles to pull to one side as the nervous system attempts to keep the eyes leveled."
The lower back muscles which may be involved in spasms are:
These three muscles often respond with a spastic reaction when the hips are not leveled horizontaly. The hips have to be leveled stucturally to make the body work efficiently, because they contain the body gravity center.
In addition these muscles respond to the "righting reflex" in the eyes. This reflex keeps our eyes leveled horizontaly so we will not get dizzy and be able to function.
When the hips are not level, the body's center of gravity is thrown off, causing the spinal muscles to pull to one side as the nervous system attempts to keep the eyes leveled. While this allows us to continue to function, the muscles mentiioned above which are forced to contract will work excessively and eventually become spasmed.