Today, one patient in four seeking medical aid does so solely with a locomotor system complaint. Many of the remaining three-quarters of all patients seeking medical aid primarily for other reasons also complain of stiffness, aches, and painful movement. The muscular-skeletal dis- orders of patients in these two categories comprise the greatest single cause of sick leave. The persons affected dominate the group of those who retire early on disability pensions. The socio-economic problems resulting from muscular-skeletal dis- orders are undoubtedly greater and more wide- spread than indicated by any single statistic. Years of research and experience in studying and treating locomotor system maladies have clearly proven the effectiveness of treatment through "relaxation and stretching of shortened muscles and other related ·structures.