Jenkins Jo Baker, Wyon Matthew, Nevill Alan
School of Human Sciences, London Metropolitan University, 166-220 Holloway Rd., London N7 8DB, UK. Tel +44(0) 8133 4282.
Med Probl Perform Art. 2013 Dec;28(4):230-5.
Research has suggested that dancers may be more at risk of injury when they excessively utilise non-hip components of turnout to compensate for deficits in hip external rotation when trying to achieve maximal total turnout. However, recently different measures of turnout have been cited in the literature as well as suggestions for derived variables to account for shortfalls in particular components of turnout. This study aimed to assess whether measurements of turnout can predict the number of injuries (0 or 1 injury, or 2+ injuries) over a 10-month period.
At the beginning of the academic year, 47 female, full-time, contemporary dance students (mean age 19.9 ± 2.51 yrs; height 1.65 ± 0.05 cm; weight 56.23 ± 6.51 kg) were screened as part of a biannual screening process. Measurements, summed of both legs, were obtained for passive hip external rotation (pER), total passive turnout (TPT), and total active turnout (TAT). From these, three further variables were derived: compensated turnout, muscular turnout, and active ER lag. At the end of 10 months, the dancers' physiotherapist-reported and self-reported injuries were obtained.
Binary regression analyses for the six turnout variables identified compensated and muscular values as having significant positive effects. For every 1% increase in compensated and muscular values, there was a corresponding 9% or 8.4% increase in the odds that the dancer would sustain 2 or more injuries compared to 0 or 1 injury.
Screening compensated and muscular values may be useful to address shortfalls to prevent injuries in the future.
研究表明，舞者在试图达到最大总外旋度时，若过度利用非髋关节外旋的其他身体部位来弥补髋关节外旋不足，可能会面临更高的受伤风险。然而，最近文献中引用了不同的外旋度测量方法，以及针对外旋特定组成部分不足的衍生变量建议。本研究旨在评估外旋度测量是否能预测10个月内的受伤次数（0次或1次受伤，或2次及以上受伤）。
在学年开始时，作为半年一次筛查过程的一部分，对47名全日制当代舞专业女学生（平均年龄19.9±2.51岁；身高1.65±0.05厘米；体重56.23±6.51千克）进行了筛查。测量了双腿的被动髋关节外旋（pER）、总被动外旋度（TPT）和总主动外旋度（TAT），并将测量值相加。从这些测量值中，又得出了另外三个变量：代偿性外旋度、肌肉性外旋度和主动外旋滞后。在10个月结束时，获取了舞者经物理治疗师报告和自我报告的受伤情况。
对六个外旋度变量进行的二元回归分析表明，代偿性和肌肉性外旋度值具有显著的正向影响。代偿性和肌肉性外旋度值每增加1%，与0次或1次受伤相比，舞者遭受2次或更多次受伤的几率相应增加9%或8.4%。
筛查代偿性和肌肉性外旋度值可能有助于弥补不足，预防未来受伤。
