Abstract
We evaluated glenohumeral range of motion and laxity in 550 high school baseball players and investigated the relationship between those characteristics and shoulder pain. The results revealed that all players exhibited a consistently greater degree of external rotation and a corresponding lesser degree of internal rotation in the dominant shoulder. However, there were no statistically significant correlation between ROM and incidence of shoulder pain. Shoulder laxity was evaluated with the Load & Shift test and the sulcus sign. Overall, 41% of the dominant shoulders exhibited laxity. Among those shoulders, there were 34% of the dominant shoulders with anterior laxity, 21% with inferior laxity, 20% with posterior laxity. The players who has laxity in their shoulders experienced early detection of shoulder laxity and a corrective training program should be considered to prevent shoulder pain.
