Fig. 5. Muscle activity of each exercise and forearm position. SIER, sitting external rotation at 0° abduction; STER, standing external rotation at 90° abduction; PRER, prone external rotation at 90° of abduction; SLER, side-lying external rotation at 0° abduction; %MVIC, %maximal voluntary isometric contraction; PD, posterior deltoid; IF, infraspinatus; BB, biceps brachii; Neu, neutral; Sup, supinated. *p < 0.05. **p < 0.01.

Phys. Ther. Korea 2022;29:106~116 https://doi.org/10.12674/ptk.2022.29.2.106

© Physical Therapy Korea