Chasse Patrick, Bullock Garrett S, Schmitt Abigail C, Little Barrett A, Diehl Lee H, Butler Robert J
Toronto Blue Jays Baseball Club, Toronto, Canada.
Mountain River Physical Therapy, Chatham, VA, USA.
Int J Sports Phys Ther. 2018 Aug;13(5):819-827.
HYPOTHESIS/PURPOSE: The purpose of this study was to assess relationships between active trunk rotation range of motion (TROM), upper quarter dynamic stability, and composite and individual item KJOC scores in collegiate baseball pitchers. A secondary purpose was to determine whether differences exist between baseball pitchers with and without an injury history in terms of their performance on TROM, upper quarter dynamic stability, and composite and individual KJOC scores. It was hypothesized that increased TROM and upper quarter dynamic stability are associated with better (higher) KJOC scores and pitchers with an injury history would exhibit lower KJOC scores compared to uninjured pitchers.
Cross-sectional Cohort Study.
Thirty-six college pitchers were assessed for TROM, performance on the Upper Quarter Y-Balance Test (YBT-UQ) and they also completed the KJOC. Subjects were grouped based on previous injury history: injured, required surgery, (IS, n=9), injured, no surgery, (INS, n=6), and uninjured (UI, n=21). Pearson's Correlations were used to assess relationships between clinical measurements and the KJOC. One-way ANOVAs were used to assess differences in TROM, YBT-UQ, and KJOC scores between groups (P<0.05).
No significant relationships were detected between TROM measures and KJOC composite scores (throwing arm: = .239, p = 0.16; non-throwing arm: =.291, p = 0.09). A moderate relationship was found between the YBT-UQ and the KJOC scores (throwing arm: = .413, p = 0.01; non-throwing arm: =.380, p = 0.02). The mean KJOC scores for item 1 (warm-up limitations) were significantly different between all three groups (IS: 6.7, INS: 9.7, UI: 9.1; p = 0.015). Mean scores on item 5 (strain on relationships with coaches) and item 8 (limitations in competition endurance) were significantly different between the IS and UI groups (Item 5 = IS: 7.8, UI: 9.5, p = 0.02; Item 8=IS: 6.4, UI: 8.8, p = 0.04).
A positive moderate association was found between upper quarter dynamic stability as measured by the YBT-UQ and the KJOC. Pitchers with no surgical history had better KJOC scores for warm up time, competitive endurance, and impact on team relationships.
假设/目的：本研究的目的是评估大学棒球投手的主动躯干旋转运动范围（TROM）、上肢动态稳定性与KJOC综合及单项得分之间的关系。第二个目的是确定有和没有受伤史的棒球投手在TROM、上肢动态稳定性以及KJOC综合和单项得分方面的表现是否存在差异。研究假设为，TROM增加和上肢动态稳定性提高与更好（更高）的KJOC得分相关，并且与未受伤的投手相比，有受伤史的投手KJOC得分更低。
横断面队列研究。
对36名大学投手进行了TROM评估、上肢Y平衡测试（YBT-UQ）表现评估，他们还完成了KJOC测试。根据既往受伤史将受试者分组：受伤且需要手术（IS，n = 9）、受伤但未手术（INS，n = 6）和未受伤（UI，n = 21）。使用Pearson相关性分析评估临床测量指标与KJOC之间的关系。使用单因素方差分析评估各组之间TROM、YBT-UQ和KJOC得分的差异（P<0.05）。
未发现TROM测量值与KJOC综合得分之间存在显著关系（投掷手臂：r = 0.239，p = 0.16；非投掷手臂：r = 0.291，p = 0.09）。发现YBT-UQ与KJOC得分之间存在中等程度的关系（投掷手臂：r = 0.413，p = 0.01；非投掷手臂：r = 0.380，p = 0.02）。所有三组在第1项（热身限制）的平均KJOC得分存在显著差异（IS组：6.7，INS组：9.7，UI组：9.1；p = 0.015）。IS组和UI组在第5项（与教练关系紧张）和第8项（比赛耐力受限）的平均得分存在显著差异（第5项：IS组：7.8，UI组：9.5，p = 0.02；第8项：IS组：6.4，UI组：8.8，p = 0.04）。
通过YBT-UQ测量的上肢动态稳定性与KJOC之间存在中等程度的正相关。没有手术史的投手在热身时间、比赛耐力以及对团队关系的影响方面有更好的KJOC得分。
3级。
