Fig. 4

Comparison of the percentage of standardized weighted EMG (%sEMG) of supraspinatus between the groups graded by degree of shoulder abduction, degree of shoulder horizontal flexion, and humeral rotation. Error bars indicate the interquartile range (IQR) of the median. Black dots indicate values above the upper fence (1.5*IQR). * above the lines spanning between groups indicates significant P-values < 0.05