The participants will be allocated togroups receiving 1 of 2 interventions:(1) placebo therapy or (2) MDT. Participants in each group will receive 10 sessions of 30 minutes each (2 sessions per week over 5 weeks). The studies on the McKenzie method do not have a standard number of sessions given that some studies propose low doses of treatment, 16,17,27 and others recommend higher doses.13,15