 The purpose of this study is to investigate the effect on QoL, PI and the AROM in patients with non-specific chronic low back pain. This after following an episode of 6 weeks 2 times a week physiotherapeutic back rehabilitation according to the 4 times T method by orthopedic disorder 4MTOR. The results in this research will be analyzed and reported. In this study, 7 dependent variables will be independently examined relative to 2 independent variables. 