 The RMANOVA-MD power analysis was performed using the following values: Power.81, Alpha 0.50, Sample size effect f2 .25, resulting in a minimum of 28 participants, Fcritical 3.175 and an actual power of .82 . Cohen advises a medium-sized effect size f2 .25 in a RMANOVA-MD. 10 will be added to these 28 participants n 30, towards the possible dropouts. The NSP-CLBP participants are divided into 2 groups. 