Does it always require an injury to reproduce a subluxation?
No. Any stress on the body, from physical, emotional, chemical or mental stress can cause you to reproduce the subluxation. We are subject to our environment and must continually adjust to it. Within that environment are disease-producing organisms, pollutants, poisons, and other irritants to which the body is subject and must adapt. If the body cannot adapt through the nervous system mechanisms, a subluxation can be produced. Stress from emotional upsets is also a common cause of the subluxation.