Context:

Researchers have shown that patients with chronic ankle instability (CAI) have deficits in memory and attention allocation. This functional deficit affects the lower extremity performance. Motor-cognitive dual-task training may improve lower limb dysfunction caused by central nervous system injury. Whether dual-task training is more favorable than single-task training for neuromuscular control in patients with single-task training still needs to be further proven.

Objective:

To determine whether balance-cognitive dual-task training can influence cortical activity and has more effective treatment effects than balance single-task training.

Design:

Randomized controlled clinical trial (Clinical Trials: XXX).

Setting:

Rehabilitation training room.

Patients or Other Participants:

After recruitment, twenty-four patients with CAI (age=22.33±2.43 years, height=175.62±7.7 cm, mass=70.63±14.59 kg) were block randomized into two groups.

Intervention(s):

Protocols were performed three times per week for six weeks. The single-task group underwent one-leg static balance training with and without vision and hopping balance training. The dual-task group underwent balance and cognitive training (backward counting task).

Main Outcome Measure(s):

The follow variables were assessed before and after the interventions: cortical activity, proprioception, muscle onset time, and dynamic balance. We performed MANOVAs to compare changes of main effects and interactions across groups and time. A post-hoc Bonferroni test was performed for pairwise comparisons when there were significant interactions with the MANOVAs.

Results:

Twenty-four participants successfully completed the six-week interventions. Proprioception, peroneus longus muscle onset time, and dynamic postural control improved significantly after the interventions in both groups (P<0.05). Dual-task training was superior to single-task training in improving JPS plantarflexion, shortening peroneus longus muscle onset time, and altering cortical activity(P<0.05).

Conclusions:

A six-week balance training program or balance combined with cognitive training could improve the functional deficits associated with CAI. Meanwhile, the dual-task training could improve cortical activity and lower extremity function.

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Author notes

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Liangwei Chai and Ximei Sun contributed equally to this work

Email address: Liangwei Chai, Rehabilitation Therapist, chailiangwei@163.com;

Ximei Sun, Rehabilitation Therapist, xxam1122334@163.com;

Qiuyu Huang, Rehabilitation Therapist, huangqiuyu2020@cupes.edu.cn;

Tao Huang, Rehabilitation Therapist, huangtao@bonespace.cn;

Xiulan Guo, guoxiulan0228@163.com;

Hua Liu, liuhua@cupes.edu.cn.