Fig. 4From: Effect of external load on scapular upward rotation during arm elevation: the knot conceptWe observed 2 distinct patterns: the scapular upward rotation decreased after knot formation (type I) or increased after knot formation (type II) during arm elevation. The dashed line expresses the scapulohumeral rhythm ratio of 2:1 proposed by Inman et al. (1944)Back to article page