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首页> 外文期刊>Orthopaedic Journal of Sports Medicine >The Impact of Workload on the Evolution of Hip Internal and External Rotation in Professional Baseball Players Over the Course of the Season
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The Impact of Workload on the Evolution of Hip Internal and External Rotation in Professional Baseball Players Over the Course of the Season

机译：整个季节工作量对职业棒球选手髋内外旋转的演变的影响

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Background: Although restricted hip range of motion (ROM) is associated with an increased risk for injuries in baseball players, the evolution of hip ROM over the season remains undefined. Hypothesis: Hip ROM profiles would be symmetric between hips and positions (pitchers vs position players) but would decrease from preseason to postseason. Additionally, it was hypothesized that this decrease in motion would correlate with workload. Study Design: Cohort study; Level of evidence, 2. Methods: Bilateral hip ROM was assessed in 96 professional baseball players (54 pitchers, 42 position players) preseason and postseason. ROM comparisons were made between lead and trailing hips, pitchers and position players, and preseason and postseason measures. The change from preseason to postseason was correlated with player demographics and measures of workload for pitchers and position players. Results: Preseason hip ROM was symmetric between hips; however, pitchers demonstrated increased preseason lead hip internal rotation (IR) ( P = .018) and bilateral hip total ROM (TROM) ( P < .020) compared with position players. From preseason to postseason, position players lost 7° of external rotation (ER) ( P ≤ .005 ). In pitchers, the loss of IR correlated with increased pitches ( P = .016) and innings ( P = .037), while the loss of ER ( P = .005 ) and TROM ( P = .014) correlated with increasing mean fastball velocity. Workload for position players did not correlate with motion loss. Conclusion: Symmetric hip ROM profiles should be anticipated in baseball players; however, pitchers may have increased preseason IR and TROM and postseason ER and TROM relative to position players. Although loss of motion correlated with workload in pitchers, this was not the case for position players. Hip motion should be monitored over the course of the season. This is particularly true for pitchers who lose IR as workload increases, which may place them at a greater risk for injuries.
机译：背景：尽管受限的髋关节活动范围（ROM）与增加棒球运动员受伤风险有关，但整个季节髋关节ROM的演变仍不确定。假设：臀部ROM轮廓在臀部和位置（投手vs位置球员）之间是对称的，但在季前到季后会减少。另外，假设运动的减少将与工作量相关。研究设计：队列研究;证据水平：2。方法：在季前赛和季后赛中对96名职业棒球球员（54名投手，42名位置球员）进行了双侧髋关节ROM评估。 ROM比较了前臀部和后臀部，投手和位置球员以及季前和季后措施。从季前赛到季后赛的变化与球员的人口统计学特征以及投手和位置球员的工作量度量相关。结果：季前臀部ROM在臀部之间是对称的。然而，与位置球员相比，投手的季前赛前髋部内部旋转（IR）（P = .018）和双侧髋部总ROM（TROM）（P <.020）有所增加。从季前赛到季后赛，位置球员失去7°的外部旋转（ER）（P≤.005）。在投手中，IR的损失与投球（P = .016）和一局（P = .037）的增加相关，而ER（P = .005）和TROM（P = .014）的损失与平均快球的增加相关速度。位置球员的工作量与运动损失无关。结论：在棒球运动员中应该期望对称的髋部ROM轮廓;但是，相对于位置球员，投手可能会增加季前IR和TROM以及季后ER和TROM。尽管运动失误与投手的工作量有关，但位置球员却并非如此。在整个赛季中应监控臀部运动。对于随着工作量增加而丢失IR的投手，尤其如此，这可能使他们面临更大的受伤风险。

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