Department of Excercise, Sport and Leisure Studies, The University of Tennessee, Knoxville, 37996, USA.
J Orthop Sports Phys Ther. 2009 Dec;39(12):875-83. doi: 10.2519/jospt.2009.3125.
Controlled laboratory study.
To examine effectiveness of an ankle brace with a subtalar locking system in restricting ankle inversion during passive and dynamic movements.
Semirigid ankle braces are considered more effective in restricting ankle inversion than other types of brace, but a semirigid brace with a subtalar locking system may be even more effective.
Nineteen healthy subjects with no history of major lower extremity injuries were included in the study. Participants performed 5 trials of an ankle inversion drop test and a lateral-cutting movement without wearing a brace and while wearing either the Element (with the subtalar locking system), a Functional ankle brace, or an ASO ankle brace. A 2-way repeated-measures analysis of variance (ANOVA) was used to assess brace differences (P?.05).
All 3 braces significantly reduced total passive ankle frontal plane range of motion (ROM), with the Element ankle brace being the most effective. For the inversion drop the results showed significant reductions in peak ankle inversion angle and inversion ROM for all 3 braces compared to the no brace condition; and the peak inversion velocity was also reduced for the Element brace and the Functional brace. In the lateral-cutting movement, a small but significant reduction of the peak inversion angle in early foot contact and the peak eversion velocity at push-off were seen when wearing the Element and the Functional ankle braces compared to the no brace condition. Peak vertical ground reaction force was reduced for the Element brace compared to the ASO brace and the no brace conditions.
These results suggest that the tested ankle braces, especially the Element brace, provided effective restriction of ankle inversion during both passive and dynamic movements.
对照实验室研究。
研究一种带距下关节锁扣的踝部支具在限制被动和主动运动时踝关节内翻的效果。
与其他类型的踝部支具相比，半刚性踝部支具在限制踝关节内翻方面更有效，但带距下关节锁扣的半刚性支具可能效果更佳。
19 名无下肢重大损伤史的健康受试者参与了本研究。参与者在不佩戴支具、佩戴 Element 踝部支具（带距下关节锁扣）、Functional 踝部支具或 ASO 踝部支具的情况下分别进行 5 次踝关节内翻下落试验和侧移运动。采用 2 因素重复测量方差分析（ANOVA）评估支具差异（P<.05）。
所有 3 种支具均显著减小了踝关节的总被动额状面活动范围（ROM），其中 Element 踝部支具的效果最显著。在踝关节内翻下落试验中，与不佩戴支具相比，所有 3 种支具均显著减小了踝关节最大内翻角度和内翻 ROM；Element 踝部支具和 Functional 踝部支具还减小了最大内翻速度。在侧移运动中，与不佩戴支具相比，佩戴 Element 踝部支具和 Functional 踝部支具时，在足早期触地时踝关节最大内翻角度和蹬离时最大外翻速度略有减小。与不佩戴支具和 ASO 踝部支具相比，Element 踝部支具的地面垂直反作用力峰值减小。
这些结果表明，所测试的踝部支具，尤其是 Element 踝部支具，在被动和主动运动时均能有效限制踝关节内翻。
