Evidence in Support of Management The randomised controlled trial is the optimal study design for evaluating therapy efficacy, with systematic reviews used to analytically summarise this evidence. Several systematic reviews have investigated the efficacy of exercise in general for back pain, with some including an analysis of McKenzie trials and others focusing particularly on the McKenzie technique. Belanger et al. (1991) discovered three scientifically admissible’ … Continue reading Part 3- Evidence behind McKenzie method of mechanical diagnosis and therapy