Characteristics of Shoulder Joint External Rotation and Internal Rotation Muscle Strength and Range of Motion of University Female Softball Players with a History of Shoulder Joint Pain

Abstract

[Purpose] The purpose of this study was to clarify the characteristics of shoulder joint external rotation and internal rotation muscle strength and range of motion of university student female softball players with a history of shoulder joint pain. [Participants and Methods] The participants were 23 college female softball players. Isometric muscle strength and range of motion of the external and internal rotations of the shoulder joint were compared between the the group with a history of shoulder joint pain and the healthy group. [Results] The range of motion of internal rotation of the shoulder joint of the dominant/non-dominant hand was significantly lower in the group with a history of shoulder joint pain than in the healthy group. [Conclusion] College female softball players with a history of shoulder pain were characterized by a low range of motion of internal rotation of the shoulder joint.