The participants, after obtaining a written informed consent, were randomized for one of the two groups: In the Global Postural Reeducation group (GPR), they were submitted 1 time per week, during 12 weeks, at GPR sessions. The duration of sessions was 60 minutes each, with the same physical Therapist of the study. After the intervention, subjects returned to assessment 3 months after, with the blinded assessor. All the 6 postures from GPR were used during the study. All outcomes measurements, in both groups, were validated for Portuguese language and applicable at baseline, 3 months and 6 months after baseline.

In the control group, no physical intervention was given during the study. After the study, 6 months after, all participants from control group received the same treatment given in GPR group, according to the Unifesp Ethics Committee orientations. All participants, of both groups, have a doctor from the study, if necessary.

No physical intervention was given, patients were treated only with medication if necessary.

The primary outcome of this study was the measurement of pain assessed with 0-10cm Visual Analogue Scale (VAS). They were collected at baseline and two follow-up examinations after 3 and 6 months from baseline.

The secondary outcome included function measured by Roland Morris Questionnaire. It was collected at baseline and two follow-up examinations after 3 and 6 months from baseline.