背景:患有慢性踝关节不稳(CAI)的个体在侧切任务中表现出改变的运动策略。然而,没有研究调查改变的运动策略如何影响切割性能。
目的:为了研究CAI患者的侧跳试验(SHT)中的代偿策略,专注于整个下肢。
方法:横断面研究。
方法:实验室。
方法:共有40名男足球运动员(CAI,n=20,年龄-20.35±1.15岁,高度-173.95±6.07cm,重量-68.09±6.73kg;对照,n=20,年龄-20.45±1.50岁,高度-172.39±4.39厘米,重量-67.16±4.87千克)。
方法:参与者进行了三项成功的SHT试验。
方法:我们计算了SHT时间,扭矩,脚踝的扭力,膝盖,使用运动捕捉相机和测力板在SHT期间和髋关节。当各组的置信区间在时间序列数据中连续重叠不超过3个点时,确定两组之间存在差异。
结果:与对照组相比,CAI组显示(1)SHT时间无延迟;(2)踝关节内翻力矩较小(0.11-0.13Nm•kg-1),和更大的髋关节伸展(0.18-0.72Nm•kg-1)和外展扭矩(0.26Nm•kg-1);(3)踝关节背屈/足底屈(0.18W•kg-1)和内翻/外翻(0.40W•kg-1)的同心力较小,髋部屈伸同心力较大(0.73W•kg-1),膝盖内翻/外翻的偏心力更大(0.27W•kg-1)。
结论:患有CAI的人可能依靠髋关节功能来补偿踝关节不稳定,在SHT时间没有任何差异。因此,有必要考虑到CAI个体的运动策略可能与健康个体的运动策略不同,即使SHT时间没有差异。
BACKGROUND: Individuals with chronic ankle instability (CAI) exhibit altered movement strategies during side-cutting tasks. However, no researchers have assessed how altered movement strategies affect cutting performance.
OBJECTIVE: To investigate compensatory strategies in the side-hop test (SHT), with a focus on the entire lower extremity, among individuals with CAI.
METHODS: Cross-sectional study.
METHODS: Laboratory.
METHODS: A total of 40 male soccer players comprising a CAI group (n = 20; age = 20.35 ± 1.15 years, height = 173.95 ± 6.07 cm, mass = 68.09 ± 6.73 kg) and a control group (n = 20; age = 20.45 ± 1.50 years, height = 172.39 ± 4.39 cm, mass = 67.16 ± 4.87 kg).
METHODS: Participants performed 3 successful SHT trials.
METHODS: We calculated SHT time, torque, and torque power in the ankle, knee, and hip joints during the SHT using motion-capture cameras and force plates. Confidence intervals for each group that did not overlap by >3 points consecutively in the time series data indicated a difference between groups.
RESULTS: Compared with the control group, the CAI group showed (1) no delayed SHT time; (2) lower ankle-inversion torque (range = 0.11-0.13 N·m/kg) and higher hip-extension (range = 0.18-0.72 N·m/kg) and -abduction torque (0.26 N·m/kg); (3) less concentric power in ankle dorsiflexion-plantar flexion (0.18 W/kg) and inversion-eversion (0.40 W/kg), more concentric power in hip flexion-extension (0.73 W/kg), and more eccentric power in knee varus-valgus (0.27 W/kg).
CONCLUSIONS: Individuals with CAI were likely to rely on hip-joint function to compensate for ankle instability and demonstrated no differences in SHT time compared with the control group. Therefore, the movement strategies of individuals with CAI could differ from those of individuals without CAI, even if SHT time is not different.