The following video explains the most common causes for back injuries – most of which occur from repeated poor body mechanics. By understanding what positions and movements cause low back problems, you can take steps to avoid them and avoid injury.
Workplace Health Training Program: Back & Neck Injury
As Dr. Bunch explains, although people may think that they hurt themselves bending over to tie their shoes, or after sneezing or experiencing some minor physical trauma, these are not the real cause of the injury. In fact, most back and neck problems develop gradually over time until the bodycan no longer compensate and some minor incident (or maybe nothing in particular) sets off symptoms and then the problem becomes noticeable.
For more information, see my prior posts on back pain.