The list author says: "Not many people have heard of the multifidus muscles, but everyone has them, and if you have low back pain that won't seem to go away, it's time you found out more.
Why? Simply because the research has literally been piling up showing that this back muscle is abnormal in many people with back pain. For instance, if you have a herniated disc, have had back surgery, have an unstable vertebrae, or just plain chronic (long-term) back pain, well, there's a GOOD chance you have a problem with your multifidus muscle.
But what kind of problem? Well, in most cases, its smaller on one side of the back, and if you stick it with an EMG needle, it's clearly not contracting like it should!
Sounds horrible, but don't worry too much yet, because with the proper exercises, its entirely possible to get it bigger and working again. Much research has shown this, for instance...
-one randomized controlled trial involved 44 patients that had unstable vertebrae in their lumbar spine (O'Sullivan 1997). At the end of the study, only those patients that did specific exercises for their multifidus muscles showed huge reductions in their back pain.
-another randomized controlled trial studied 54 chronic back pain sufferers (Risch 1993). One group sat on a waiting list, while the other group exercised their multifidus muscles. At the end of the study, only the group that exercised their multiifidus showed marked decreases in back pain.
As you can see, not only has the published research found a big connection between back pain and abnormal multifidus muscles, but the problem can be fixed! You can find out more about multifidus exercises and back pain in "Treat Your Own Spinal Stenosis"."