Visceral Manipulation in Patients With Chronic Low Back Pain

Visceral manipulation techniques consists of deep manual pressure in certain points of the abdomen and the amount of pressure will be respected according to the participant discomfort or pain. It will be performed cardia mobilization, pylori mobilization, Oddi's sphincter mobilization, duodenum-jejunum valve mobilization, ileocecal valve mobilization, global technique for the liver, global hemodynamic technique. Each technique will last 1 minutes, with the two last ones repeated 10 times.

The care includes advice for correct postures to perform daily activities; abdominal, pelvic and lumbar muscles re-training and strengthening; and advice to perform at least 20 minutes' walk three times a week. The therapist will treat the participants once a week for a 5-week period. All treatment session will last 40 minutes.

The placebo intervention involves light touch at the same regions of the techniques the active visceral manipulation, and no intention on the part of the therapist to impart any therapeutic technique