"Cognitive Functional Therapy" vs. Manual Therapy for Non-specific Low Back Pain

This is a pilot study. Chronic LBP is a major health care problem in Denmark. Few patients receive a specific diagnosis, leaving the majority of patients diagnosed with non specific low back pain(NSLBP). Classification systems can help to guide the treatment of NSLBP. This pilot study will compare manual therapy (manipulation and soft tissue treatment)and exercises to a classification based biopsychosocial intervention (a cognitive/functional approach) as described by Peter O\'Sullivan, on a subgroup called \"flexion pattern\" This pilot study has three specific aims: (i) To determine the mean and standard deviation on the numerical rating scale of participants in this setting who have a motor control flexion pattern, so that sample size calculations for a fully powered randomized controlled trial could be performed. (ii) To test the logistical and practical procedures that will be required to perform a fully powered randomized controlled trial using these two treatments. (iii) To gain a preliminary estimate of any difference in the effect of these two treatments, so as to determine if the results of a fully powered randomized controlled trial might be clinically important and therefore worthwhile undertaking