Fig. (6) Electromyographic activities of the rotator cuff muscles during flexion and reaching elevation. 6a supraspinatus, 6b infraspinatus, 6c teres minor, 6d subscapularis. R elevation; reaching elevation. * P < 0.05, ** P < 0.01 (Friedman test or Wilcoxson signed-rank test). The range bars showed the standard deviation.