Wright Rick W, Steger-May Karen, Wasserlauf Brett L, O'Neal Mark E, Weinberg Barry W, Paletta George A
Department of Orthopaedic Surgery, Washington University School of Medicine, West Pavilion, St. Louis, MO 63110, USA.
Am J Sports Med. 2006 Feb;34(2):190-3. doi: 10.1177/0363546505279921. Epub 2005 Oct 11.
Physicians involved with the care of baseball players have noted elbow range of motion changes in pitchers. Objective data regarding the extent of these changes have rarely been documented.
Dominant and nondominant elbow range of motion differences are common in baseball pitchers, and these differences are related to player age, amount and length of time professionally pitched, and history of surgical procedures on the dominant extremity.
Cross-sectional study; Level of evidence, 4.
Thirty-three professional pitchers were evaluated for elbow range of motion during spring training preseason physical examination. Dominant and nondominant elbow range of motion including flexion, extension, supination, and pronation were measured with a goniometer. Range of motion measures from the dominant and nondominant sides were compared. Baseball records were reviewed for arm dominance, age, years of professional pitching, professional innings pitched, and history of elbow surgery. These factors were evaluated for their possible association with range of motion for each side and the difference between sides.
Statistically significant differences between dominant and nondominant sides were noted for elbow extension (dominant decreased 7.9 degrees +/- 7.4 degrees, P < .0001), flexion (dominant decreased 5.5 degrees +/- 7.8 degrees, P = .0003), and total flexion-extension arc (dominant decreased 13.3 degrees +/- 13.7 degrees, P < .0001). No significant difference between sides was found for the supination or pronation measures. No correlation was noted for age, pitching history, surgery, or arm dominance and the motion differences.
Professional pitchers demonstrate elbow flexion and extension differences between dominant and nondominant elbows. No correlation was found between motion differences and age, pitching history, surgery, or arm dominance.
参与棒球运动员护理的医生注意到投手的肘部活动范围有变化。关于这些变化程度的客观数据鲜有记录。
在棒球投手中，优势侧和非优势侧肘部活动范围的差异很常见，且这些差异与球员年龄、职业投球的数量和时长以及优势肢体的手术史有关。
横断面研究；证据等级，4级。
在春季训练季前体检期间，对33名职业投手的肘部活动范围进行评估。使用角度计测量优势侧和非优势侧肘部的活动范围，包括屈曲、伸展、旋后和旋前。比较优势侧和非优势侧的活动范围测量值。查阅棒球记录，了解手臂优势、年龄、职业投球年限、职业投球局数和肘部手术史。评估这些因素与每一侧活动范围以及两侧差异之间的可能关联。
优势侧和非优势侧在肘部伸展（优势侧减少7.9度±7.4度，P <.0001）、屈曲（优势侧减少5.5度±7.8度，P =.0003）以及总屈伸弧度（优势侧减少13.3度±13.7度，P <.0001）方面存在统计学显著差异。旋后或旋前测量值两侧无显著差异。年龄、投球历史、手术或手臂优势与活动差异之间未发现相关性。
职业投手的优势侧和非优势侧肘部在屈曲和伸展方面存在差异。活动差异与年龄、投球历史、手术或手臂优势之间未发现相关性。
