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首页> 外文期刊>Orthopaedic Journal of Sports Medicine >Unaccounted Workload Factor: Game-Day Pitch Counts in High School Baseball Pitchers—An Observational Study
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Unaccounted Workload Factor: Game-Day Pitch Counts in High School Baseball Pitchers—An Observational Study

机译：未知的工作量因素：高中棒球投手的比赛日投球计数—一项观察性研究

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Background: Throwing injuries are common in high school baseball. Known risk factors include excessive pitch counts, year-round pitching, and pitching with arm pain and fatigue. Despite the evidence, the prevalence of pitching injuries among high school players has not decreased. One possibility to explain this pattern is that players accumulate unaccounted pitch volume during warm-up and bullpen activity, but this has not yet been examined. Hypotheses: Our primary hypothesis was that approximately 30% to 40% of pitches thrown off a mound by high school pitchers during a game-day outing are unaccounted for in current data but will be revealed when bullpen sessions and warm-up pitches are included. Our secondary hypothesis was that there is wide variability among players in the number of bullpen pitches thrown per outing. Study Design: Cross-sectional study; Level of evidence, 3. Methods: Researchers counted all pitches thrown off a mound during varsity high school baseball games played by 34 high schools in North Central Florida during the 2017 season. Results: We recorded 13,769 total pitches during 115 varsity high school baseball starting pitcher outings. The mean ± SD pitch numbers per game were calculated for bullpen activity (27.2 ± 9.4), warm-up (23.6 ±8.0), live games (68.9 ±19.7), and total pitches per game (119.7 ± 27.8). Thus, 42.4% of the pitches performed were not accounted for in the pitch count monitoring of these players. The number of bullpen pitches thrown varied widely among players, with 25% of participants in our data set throwing fewer than 22 pitches and 25% throwing more than 33 pitches per outing. Conclusion: In high school baseball players, pitch count monitoring does not account for the substantial volume of pitching that occurs during warm-up and bullpen activity during the playing season. These extra pitches should be closely monitored to help mitigate the risk of overuse injury.
机译：背景：投掷伤在高中棒球中很常见。已知的风险因素包括过多的俯仰计数，全年俯仰以及因手臂疼痛和疲劳而俯仰。尽管有证据，高中球员的投球伤患病率仍未下降。解释这种模式的一种可能性是，运动员在热身和围栏活动期间积累了无法估计的音高，但是尚未对此进行检查。假设：我们的主要假设是，在比赛日郊游期间，高中投手从一个土墩扔出的投球大约有30％至40％在当前数据中无法得到解释，但是当包括牛棚训练和热身投球时就会显示出来。我们的第二个假设是，每次郊游投掷的牛棚投球数在球员之间存在很大的差异。研究设计：横断面研究;证据等级，3。方法：研究人员计算了2017赛季佛罗里达州中北部的34所高中进行的大学高中棒球比赛中所有投掷到球场上的球。结果：我们在115场高中棒球起始投手郊游中记录了13,769个总投球。计算出每场比赛的平均±SD推杆数，用于牛栏活动（27.2±9.4），热身（23.6±8.0），现场比赛（68.9±19.7）和每局总推杆（119.7±27.8）。因此，在这些球员的音高计数监控中，没有考虑到执行的42.4％的音高。运动员投掷的牛棚投球数量差异很大，我们数据集中25％的参与者投掷少于22个投球，而25％的参与者每次郊游投掷超过33个投球。结论：在高中棒球运动员中，对球场数的监控并不能说明在比赛季节进行热身和围栏活动时所发生的大量球场。应密切监视这些额外的螺距，以帮助减轻过度使用造成伤害的风险。

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