Hals T M, Sitler M R, Mattacola C G
Department of Kinesiology, Temple University, Philadelphia, PA 19122, USA.
J Orthop Sports Phys Ther. 2000 Sep;30(9):552-6. doi: 10.2519/jospt.2000.30.9.552.
Within-group repeated measures.
To determine the effect of a semi-rigid prophylactic ankle stabilizer (PAS) on performance of subjects with post-acute, unilateral ankle sprains who have mechanically stable ankles, but are functionally impaired.
Most studies on PAS performance to date are limited to subjects with noninjured, nonimpaired ankles. No research has been reported to determine the effect PASs have on performance in subjects who have a mechanically stable, nonacute ankle sprain with functional impairment.
Twenty-five subjects (8 men and 17 women; average height = 168.91 +/- 33.02 cm, average weight = 61.10 +/- 29.5 kg, and average age = 16.2 +/- 6 years) met the qualification criteria of the study. Subjects had unilateral grade I or II lateral ankle sprains of 3 to 4 weeks duration and were cleared medically to return to activities of daily living. Each subject's injured ankle was mechanically stable as determined by physical exam but was functionally impaired as determined by instability during the modified Rhomberg test. Separate 2 x 2 ANOVAs with repeated measures on brace condition (Aircast SportStirrup and nonbraced control) and test session (test session 1 and test session 2) were completed to assess the effect of ankle stabilization on 2 dependent variables (36.58-m shuttle-run and vertical-jump).
Shuttle-run time was significantly faster for the braced condition (mean = 9.43 +/- .72 seconds) than for the nonbraced control (mean = 9.57 +/- .75 seconds), regardless of test session. Shuttle-run time was significantly faster for test session 2 (mean = 9.43 +/- .79 seconds) than for test session 1 (mean = 9.57 +/- .68 seconds), regardless of brace condition. No significant main or interaction effects occurred for vertical-jump.
Use of a semi-rigid PAS significantly increased shuttle-run but not vertical-jump performance. This effect was immediate and did not require PAS acclimation.
组内重复测量。
确定一种半刚性预防性踝关节稳定器（PAS）对急性后单侧踝关节扭伤且踝关节机械稳定但功能受损的受试者运动表现的影响。
迄今为止，大多数关于PAS性能的研究仅限于踝关节未受伤、未受损的受试者。尚无研究报道PAS对机械稳定、非急性踝关节扭伤且功能受损的受试者运动表现的影响。
25名受试者（8名男性和17名女性；平均身高 = 168.91±33.02厘米，平均体重 = 61.10±29.5千克，平均年龄 = 16.2±6岁）符合该研究的资格标准。受试者单侧踝关节为I级或II级外侧扭伤，病程3至4周，经医学检查允许恢复日常生活活动。经体格检查确定，每位受试者受伤的踝关节在机械上是稳定的，但经改良罗姆伯格试验期间的不稳定情况确定其功能受损。完成了单独的2×2方差分析，对支具状况（Aircast SportStirrup和无支具对照）和测试阶段（测试阶段1和测试阶段2）进行重复测量，以评估踝关节稳定对两个因变量（36.58米穿梭跑和垂直跳跃）的影响。
无论测试阶段如何，佩戴支具时的穿梭跑时间（平均 = 9.43±0.72秒）明显快于无支具对照（平均 = 9.57±0.75秒）。无论支具状况如何，测试阶段2的穿梭跑时间（平均 = 9.43±0.79秒）明显快于测试阶段1（平均 = 9.57±0.68秒）。垂直跳跃未出现显著的主效应或交互效应。
使用半刚性PAS可显著提高穿梭跑成绩，但对垂直跳跃成绩无影响。这种效果是即时的，无需适应PAS。
