Steinberg Nili, Tirosh Oren, Adams Roger, Karin Janet, Waddington Gordon
Wingate College of Physical Education and Sports Sciences, Wingate Institute, Netanya 42902, Israel. Tel +97298639245, fax +97298639376.
Med Probl Perform Art. 2017 Jun;32(2):63-70. doi: 10.21091/mppa.2017.2012.
Postural balance (PB) is a significant factor in dance performance and injury prevention. We aimed to determine whether the use of textured insoles inserted into casual walking shoes of dancers improved their dynamic PB and whether dancers with previous injury manifested different dynamic PB compared with non-injured dancers.
In this crossover design study, 26 ballet dancers from the Australian Ballet School, aged 14-19 yrs, were divided into two groups matched by sex and class levels. Group 1 wore the textured insoles in their walking shoes for at least 2 hrs/day during weeks 1 to 4 of the study, and group 2 wore the textured insoles in their walking shoes during weeks 5 to 8. Reports from the school medical staff identified dancers who had previous injuries. All participants were tested pre-intervention and at 4 and 8 weeks by an accelerometer for dynamic PB (average acceleration magnitude, root mean square acceleration, range, and mean frequency) during single-leg fondu, flexing and extending of the knee.
Interactions (group x time) were found in dynamic PB measured in the mediolateral direction, indicating significant differences between the groups at the three testing times. Furthermore, both previously injured and noninjured dancers manifested significant time effects from pre-intervention to 8 weeks, indicating a significant improvement in their PB after using the textured insoles.
Textured insoles can improve the dynamic PB of ballet dancers and can also be useful as a routine intervention. PB was improved among both dancers with previous injury and non-injured dancers.
姿势平衡（PB）是舞蹈表现和预防损伤的一个重要因素。我们旨在确定在舞者的日常步行鞋中插入纹理鞋垫是否能改善其动态姿势平衡，以及既往有损伤的舞者与未受伤的舞者相比，其动态姿势平衡是否表现不同。
在这项交叉设计研究中，26名来自澳大利亚芭蕾舞学校、年龄在14至19岁的芭蕾舞舞者按性别和班级水平匹配分为两组。第1组在研究的第1至4周期间，每天至少2小时在步行鞋中穿着纹理鞋垫，第2组在第5至8周期间在步行鞋中穿着纹理鞋垫。学校医务人员的报告确定了既往有损伤的舞者。所有参与者在干预前以及在第4周和第8周时通过加速度计进行测试，以测量单腿蹲、膝关节屈伸过程中的动态姿势平衡（平均加速度大小、均方根加速度、范围和平均频率）。
在内外侧方向测量的动态姿势平衡中发现了交互作用（组×时间），表明在三个测试时间点两组之间存在显著差异。此外，既往有损伤的舞者和未受伤的舞者从干预前到第8周均表现出显著的时间效应，表明使用纹理鞋垫后他们的姿势平衡有显著改善。
纹理鞋垫可以改善芭蕾舞舞者的动态姿势平衡，也可作为一种常规干预措施。既往有损伤的舞者和未受伤的舞者的姿势平衡均得到改善。
