双重任务和步行速度对慢性踝关节不稳患者步态变异性的影响

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Abstract Objective To evaluate the effects of dual-task and walking speed on gait variability in patients with chronic ankle instability(CAI).Methods 16 cases of patients with CAI in our hospital from January 2015 to September 2016 were selected as study objects.And 16 age-and gender-matched，able-bodied controls participated in this study.Stride time variability and stride length variability were measured on a treadmill under four different conditions：self-paced walking，self-paced walking with dual-task，fast walking，and fast walking with dual-task.Results Under self-paced walking(without dual-task)，there was no difference in stride time variability between CAI and control groups(P＝0.346).In the control group，compared to self-paced walking，stride time variability decreased in all conditions：self-paced walking with dual-task，fast speed，and fast speed with dual-task(P＝0.011，0.016 and 0.001，respectively).However，in the CAI group，compared to self-paced walking，decreased stride time variability was demonstrated only in the fast speed with dual-task condition(P＝0.008).Stride length variability did not change under any condition in either group.Conclusion Subjects with CAI and healthy controls reduced their stride time variability in response to challenging walking conditions；however，the pattern of change was different.A higher level of gait disturbance is required to cause a change in walking in the CAI group compared to healthy individuals，which may indicate lower adaptability of the sensorimotor system.

Key words： chronic ankle instability ankle sprain walking gait varability

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	Ma Yang
	Dong Weidong
	Ding Junjie
	et al

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Ma Yang,Dong Weidong,Ding Junjie, et al. Effects of Dual-task and Walking Speed on Gait Variability in People with Chronic Ankle Instability：a Cross-Sectional Study[J]. sygkzz, 2018, 24(4): 332-335.

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http://www.sygkzz.com/EN/ OR http://www.sygkzz.com/EN/Y2018/V24/I4/332

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