Verrall Geoffrey M, Slavotinek John P, Barnes Peter G, Fon Gerald T, Esterman Adrian
SPORTSMED SA Sports Medicine Clinic, Adelaide, Australia.
J Orthop Sports Phys Ther. 2006 Apr;36(4):215-24. doi: 10.2519/jospt.2006.36.4.215.
Prospective cohort study.
To examine clinical and magnetic resonance imaging (MRI) features of hamstring muscle injury to determine if any are predictive for recurrent injury.
Hamstring muscle strain injury and subsequent recurrent injury are common. Little information exists on factors that may increase the risk for recurrent injury.
The subjects were athletes from 3 professional Australian Rules football teams (n = 162). Anthropometric measurements, clinical signs, convalescent interval, and MRI assessment and measurement were undertaken and recorded in athletes with hamstring muscle strain injury. Athletes were followed for the presence, or absence, of recurrent injury to the same-side posterior thigh over the same and subsequent playing seasons.
Thirty athletes met criteria for hamstring injury. Twelve (40%) of 30 athletes had recurrent injury within the same season, with an additional 7 athletes having recurrent injury in the subsequent season. None of the features examined were associated with increased recurrent injury risk within the same playing season. Statistical analysis demonstrated that when combining the same with the subsequent playing season a larger size of initial hamstring injury, as measured by MRI, was associated with an increased risk for recurrent injury (P<.01). A measured transverse size of injury greater than 55% of the muscle, or calculated volume of injury greater than 21.8 cm3, resulted in an increased risk for hamstring recurrence of 2.2 (95% CI, 0.88-5.32) and 2.3 (95% CI, 0.94-5.81) times, respectively, when compared to athletes with hamstring injuries below these measurements.
A larger size of hamstring injury was indicative of higher risk for recurrent injury but only after the subsequent playing season was considered along with the same playing season. None of the other parameters tested, including a shorter convalescent interval and clinical features, were associated with an increased risk for recurrent injury. However, due to low sample size the certainty of these conclusions may be limited.
前瞻性队列研究。
研究腘绳肌损伤的临床及磁共振成像（MRI）特征，以确定是否有任何特征可预测复发性损伤。
腘绳肌拉伤及随后的复发性损伤很常见。关于可能增加复发性损伤风险的因素，目前所知甚少。
研究对象为来自3支澳大利亚职业橄榄球联盟球队的运动员（n = 162）。对腘绳肌拉伤的运动员进行人体测量、临床体征检查、恢复期间隔记录以及MRI评估和测量。在同一赛季及随后的赛季中，追踪运动员同侧大腿后部是否出现复发性损伤。
30名运动员符合腘绳肌损伤标准。30名运动员中有12名（40%）在同一赛季出现复发性损伤，另有7名运动员在随后的赛季出现复发性损伤。在同一比赛赛季内，所检查的特征均与复发性损伤风险增加无关。统计分析表明，将同一赛季和随后的赛季合并考虑时，MRI测量显示初始腘绳肌损伤面积较大与复发性损伤风险增加相关（P <.01）。与损伤测量值低于这些标准的腘绳肌损伤运动员相比，损伤的横向测量尺寸大于肌肉的55%，或计算出的损伤体积大于21.8 cm³，分别导致腘绳肌复发风险增加2.2倍（95%可信区间，0.88 - 5.32）和2.3倍（95%可信区间，0.94 - 5.81）。
腘绳肌损伤面积较大表明复发性损伤风险较高，但这仅在将随后的赛季与同一赛季合并考虑时才成立。所测试的其他参数，包括较短的恢复期间隔和临床特征，均与复发性损伤风险增加无关。然而，由于样本量较小，这些结论的确定性可能有限。
