Evidence-Based Complementary and Alternative Medicine the constitutional diagnosis because of smaller measurement variation. However, it should be considered that how much the measuring location represents the constitutional charac- teristics. Therefore, further research is necessary to analyze at what degree the 5-widths and the 8-circumferences locations contribute to diagnose Sasang constitution correctly. Subjects and observers in this study were only males in their 20s and the sample size is relatively small. How far the repeated measurement training could improve the reliability was not evaluated and follow-up of the training was not carried out to conﬁrm how long the training eﬀorts can last. In spite of these limitations, this study is meaningful in the view point that a comprehensive training makes it more reliable, hence giving a suﬃciently conﬁdent diagnostic tool to measure the SCBTM and that the observers’ measurement skills are close to that of the expert. 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