Shoulder pain or pathology was a common injury in overhead athletes. Overhead sports included unilateral or bilateral arms used。

tennis， few studies have been conducted with athletes who share this similar overhead movement but differ in unilateral or bilateral arms used。

and 9 baseball players). The shoulder flexion。

the purpose of this study was to measure and compare the shoulder range of motion (ROM) in healthy swimmers， no significantly difference was found in shoulder flexion and hyperextension amongst 3 groups. The internal rotation of dominant shoulder was significantly greater in swimmers than tennis and baseball players. The external rotation of dominant shoulder was showed significant smaller in swimmers than tennis and baseball players. In non-dominant shoulder， and baseball players. In dominant and non-dominant shoulder， tennis， baseball or tennis players. Therefore， such as swimmers， internal or external rotation were measured by using goniometer for both arms. One-way ANOVA and Turkey post hoc comparisons were used to analyze the difference in dominant and non-dominant shoulder amongst swimmers， tennis and baseball players. Twenty-seven overhead athletes participated in this study (7 swimmers， the internal rotation ROM was showed significantly smaller in tennis players than swimmers and baseball players. There was no significantly difference in external rotation ROM of non-dominant shoulder amongst three overhead sports. 。

or swim. Although these sports have different characteristics， they show similar overhead movement patterns. However， hyperextension。

like baseball， 11 tennis players。