X-ray analysis The participants were x-rayed for the lumbar spine. AP lateral bending films in the left and right lateral bending position 27, 28, 29 were taken in the end position of the movement as the patient would stop once the end position was reached; the central ray was going through an area seven to eight centimeters above the top of the iliac crest. The lateral film was done with the central ray going through L-5. The radiographs were analyzed by two independent chiropractors, one chiropractor did the pre treatment analysis and the other chiropractor did the post analysis. The treating chiropractor was allowed to view the radiographs, for the purpose of treatment, after the initial analyses were terminated.