Journal
JOURNAL OF SCIENCE AND MEDICINE IN SPORT
Volume 24, Issue 2, Pages 146-151Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jsams.2020.07.008
Keywords
ACL; Motor control; Return to sport
Categories
Funding
- College of Health Sciences and Professions at Ohio University in Athens, OH
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This study aimed to investigate the impact of visual-based motor and cognitive dual tasking on postural stability in individuals with anterior cruciate ligament reconstruction. The results indicated that postural stability was significantly impaired under eyes-closed and dual-motor conditions, with reconstructed individuals exhibiting greater instability during the dual-cognitive condition.
Objectives: Determine the effect of visual-based motor and cognitive dual tasking on postural stability in those with anterior cruciate ligament reconstruction relative to matched controls. Design: Cohort study. Methods: Fourteen volunteers with history of anterior crucaite ligament reconstruction were matched with fourteen healthy controls. Participants performed single leg balance tasks under 4 conditions: (1) single leg balance with eyes-open, (2) single leg balance while catching a ball (dual-motor), (3) single leg balance while repeating a string of numbers in reverse order after viewing them (dual-cognitive) and (4) single leg balance with eyes-closed. Participants completed several patient-reported outcomes of knee function. Mixed effects models were used to identify group differences on the center of pressure measures of ellipse area and root-mean-squared excursion (medial-lateral and anterior-posterior). The mixed models included subject pair as a random factor and group (control, anterior cruciate liagement reconstruction), balance condition (eyes-open, eyes-closed, dual-cognitive, and dual-motor), and group*condition as fixed effects. Tukey post-hoc pairwise comparisons were performed for significant interaction and main effects with alpha = 0.05. Results: A significant group by condition interaction was observed for ellipse area and medial-lateral root-mean-squared excursion. The anterior cruciate ligament reconstruction group had higher ellipse area (p = 0.002, d = 0.44) and medial-lateral root-mean-squared excursion (p < 0.001, d = 0.49). Conclusions: Postural stability is greatly impaired under eyes-closed and dual-motor conditions relative to eyes-open. Anterior cruciate ligament reconstructed individuals have greater postural instability during the dual-cognitive condition that may indicate unique neural processing deficits remain following anterior cruciate ligament reconstruction. (C) 2020 Sports Medicine Australia. Published by Elsevier Ltd. All rights reserved.
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