Document Detail

Reposition acuity and postural control after exercise in anterior cruciate ligament reconstructed knees.
MedLine Citation:
PMID:  24240119     Owner:  NLM     Status:  MEDLINE    
PURPOSE: This study aimed to compare the effects of 36 min of continuous exercise on postural control and joint reposition acuity in patients with anterior cruciate ligament reconstruction (ACL-R) and healthy controls.
METHODS: Twenty patients (10 women and 10 men; mean ± SD; age = 25.5 ± 5.5 yr, height = 1.75 ± 0.10 m, weight = 76.7 ± 14.4 kg) with a history of primary, uncomplicated ACL-R (5.0 ± 4.3 yr postsurgery) were matched to 20 healthy controls (10 women and 10 men, 24.6 ± 5.0 yr, 1.70 ± 0.09 m, 65.2 ± 12.1 kg). The center of pressure (COP) excursions in the medial-lateral (COP(ML-SD)) and anterior-posterior (COP(AP-SD)) directions and the velocity (COP(Vel)) and area (COP(Area)) were calculated during static, unipedal stance. Open-chain knee joint reposition acuity measures (absolute angular error [AAE] and relative angular error [RAE]) at 45° (AAE₄₅ and RAE₄₅) and 15° of knee flexion (AAE₁₅ and RAE₁₅) were recorded. Measures were recorded at baseline and after a 36-min exercise protocol. Exercise consisted of six repeating cycles of inclined treadmill walking (5 min) and jumping exercises (1 min).
RESULTS: At baseline, the ACL-R group exhibited higher magnitude AAE₄₅ compared with controls. AAE₄₅ and COP(ML-SD) significantly increased after exercise in the control group; however, the ACL-R group did not experience a change in these measures.
CONCLUSIONS: In a rested state, patients with a history of ACL-R have greater impairment in joint reposition acuity than healthy control. Exercise increased COP measurements and impaired joint reposition acuity. Healthy controls experienced impaired joint reposition acuity after exercise, whereas patients with a history of ACL-R did not.
John Goetschius; Christopher M Kuenze; Susan Saliba; Joseph M Hart
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  Medicine and science in sports and exercise     Volume:  45     ISSN:  1530-0315     ISO Abbreviation:  Med Sci Sports Exerc     Publication Date:  2013 Dec 
Date Detail:
Created Date:  2013-11-18     Completed Date:  2014-07-21     Revised Date:  2014-07-29    
Medline Journal Info:
Nlm Unique ID:  8005433     Medline TA:  Med Sci Sports Exerc     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2314-21     Citation Subset:  IM; S    
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MeSH Terms
Anterior Cruciate Ligament / injuries*,  physiology,  surgery
Anterior Cruciate Ligament Reconstruction*
Exercise / physiology*
Feedback, Sensory
Knee Joint / physiology
Postoperative Period
Postural Balance / physiology*
Proprioception / physiology
Range of Motion, Articular / physiology*
Young Adult
Erratum In:
Med Sci Sports Exerc. 2014 Apr;46(4):844

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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