| Summary: | 碩士 === 國立臺灣師範大學 === 運動競技學系 === 103 === Archery is an ancient skill that is used for hunting and battling. However, regular practice of archery may cause specific skeletal-muscular adaptation and may lead archers to form rounded shoulders that are considered the mal-alignment of the skeletons. The purpose of the study was to explore the potential training effects of the external rotators and the internal rotators of shoulders for improving the rounded shoulders. In addition, the influence of these training program to the control of stability of the bow-hand when releasing the arrows were also examined. Methods：Sixteen participants who were evaluated with rounded shoulders were randomly divided into two groups. The distance from the acromion to horizontal plane, the angles of internal and external rotations, the strength of external rotators were measured and postural evaluations about bilateral shoulders were performed for every participant before and after the training period. In addition, the EMG of the anterior deltoid of the arm that holds the bow was collected to examine the stability of bow-hand. The experimental group had 8 weeks training on strengthening the external rotators and stretching the internal rotators for bilateral shoulders. The control group did not have any intervention. Results：The experimental group improved the distance from acromion to horizontal plane, the angle of the external rotations, the strength of external rotators bilaterally after training. The control group also increased their strength of the left external rotator. The result of postural evaluation showed an improvement on the internal rotation from the experimental group after training. The stability of the bow-hand was not affected by the training program.
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