Department of Trauma Surgery, University Medical Centre Regensburg, 93042, Regensburg, Germany.
Sporthopaedicum Regensburg-Straubing, Regensburg, Germany.
Knee Surg Sports Traumatol Arthrosc. 2019 Mar;27(3):991-999. doi: 10.1007/s00167-018-5192-z. Epub 2018 Oct 12.
Side-to-side asymmetry in side-cutting manoeuvres is a known risk factor for severe knee injury. Potential leg asymmetry during ground contact times of different change-of-direction manoeuvres was evaluated in athletes by means of the recently developed SpeedCourt system. The hypotheses were that ground contact times and the limb symmetry index are affected by age and the type of sports.
One-hundred and sixty-five athletes (149 men, 16 women, age 16.5 ± 5.1) of popular team sports such as football, team handball and baseball were assessed by means of three different tests [side-hop, lateral change-of-direction (COD) and diagonal COD] using the SpeedCourt system. Analysis included the factors age, sex, type of sports, ground contact time, leg symmetry index and limb dominance.
During lateral but not diagonal COD tests, football players had shorter contact times than players of team handball (p = 0.026) and baseball (p = 0.015) of the same age group. The side-hop tests yielded differences in the leg symmetry index between players < 16 years and players > 16 years (p < 0.01). Mean ground contact time differed in each of the side-hop, lateral COD and diagonal COD tests (143.5 ± 20.0 vs. 256.2 ± 66.1 vs. 320.4 ± 55.0). Contact times and test durations of side-hop, lateral COD and diagonal COD tests were shorter for older players (p < 0.01).
Ground contact times of side-hop and change-of-direction manoeuvres are influenced by age, the type of sports and limb dominance. Such information is fundamental for future sports medicine research and needs to be considered in pre-season screening or when used as a criterion for return-to-competition of players with previous severe knee injury. Assessment of change-of-direction manoeuvres should be included in future return-to-competition test batteries.
III.
侧滑变向动作中的左右侧不对称是导致严重膝伤的已知风险因素。通过最近开发的 SpeedCourt 系统，评估了不同变向动作中地面接触时间的潜在腿部对称性在运动员中的表现。假设是地面接触时间和肢体对称指数受年龄和运动类型的影响。
165 名运动员（149 名男性，16 名女性，年龄 16.5±5.1）参加了足球、手球和棒球等流行团体运动的三项不同测试[侧跳、横向变向（COD）和对角 COD]，使用 SpeedCourt 系统进行评估。分析包括年龄、性别、运动类型、地面接触时间、肢体对称指数和肢体优势等因素。
在侧向 COD 测试中，但不在对角 COD 测试中，足球运动员的接触时间比同年龄组的手球（p=0.026）和棒球（p=0.015）运动员短。在侧跳测试中，年龄<16 岁和年龄>16 岁的运动员之间的腿部对称指数存在差异（p<0.01）。在侧跳、侧向 COD 和对角 COD 测试中，平均地面接触时间均有所不同（143.5±20.0 比 256.2±66.1 比 320.4±55.0）。年龄较大的运动员的侧跳、侧向 COD 和对角 COD 测试的接触时间和测试持续时间较短（p<0.01）。
侧跳和变向动作的地面接触时间受年龄、运动类型和肢体优势的影响。这些信息对于未来的运动医学研究至关重要，并且在进行季前筛查或作为以前有严重膝伤的运动员重返比赛的标准时，都需要考虑这些信息。变向动作的评估应该包括在未来的重返比赛测试中。
III 级。
