Document Detail

Force production and reactive strength capabilities after anterior cruciate ligament reconstruction.
MedLine Citation:
PMID:  18523574     Owner:  NLM     Status:  MEDLINE    
CONTEXT: Ambiguity exists in the literature regarding whether individuals can restore function to 100% after anterior cruciate ligament (ACL) reconstruction. The response of force production and reactive strength in stretch-shortening cycle activities after surgery has not been established.
OBJECTIVE: To compare reactive strength and force production capabilities between the involved and uninvolved legs of participants who had undergone ACL reconstruction and rehabilitation with the reactive strength and force production capabilities of a control group.
DESIGN: Repeated measures, cross-sectional.
SETTING: Research laboratory.
PATIENTS OR OTHER PARTICIPANTS: Ten participants with ACL reconstructions who had returned to their chosen sports and 10 age-matched and activity-matched control subjects.
INTERVENTION(S): We screened the ACL group with the International Knee Documentation Committee Subjective Knee Evaluation Form and functional performance tests to measure a basic level of function. We assessed force production capabilities and reactive strength using squat, countermovement, drop, and rebound jump protocols on a force sledge apparatus.
MAIN OUTCOME MEASURE(S): The dependent variables were flight time, peak vertical ground reaction force, leg spring stiffness, and reactive strength index.
RESULTS: No participant in the ACL group exhibited functional deficits in comparison with normative values or the control group. Using the force sledge apparatus, we found no notable differences in force production capabilities and reactive strength in the ACL group when comparing the involved with uninvolved legs or the degree of difference between legs with the control group.
CONCLUSIONS: After ACL reconstruction, rehabilitated participants did not exhibit deficits in force production or reactive strength capabilities. Our results suggest that force production and reactive strength capabilities can be restored to levels comparable with the uninjured control limb and may not be limiting factors in ACL recovery.
Eamonn P Flanagan; Lorcan Galvin; Andrew J Harrison
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of athletic training     Volume:  43     ISSN:  1938-162X     ISO Abbreviation:  J Athl Train     Publication Date:    2008 May-Jun
Date Detail:
Created Date:  2008-06-04     Completed Date:  2008-09-23     Revised Date:  2013-06-05    
Medline Journal Info:
Nlm Unique ID:  9301647     Medline TA:  J Athl Train     Country:  United States    
Other Details:
Languages:  eng     Pagination:  249-57     Citation Subset:  IM    
Physical Education and Sport Sciences Department, University of Limerick, Limerick, Ireland.
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MeSH Terms
Anterior Cruciate Ligament / injuries,  surgery*
Cross-Sectional Studies
Exercise Test
Health Status Indicators
Muscle Contraction / physiology*
Muscle Strength / physiology*
Muscle, Skeletal / physiology*
Postoperative Period*
Reconstructive Surgical Procedures*
Treatment Outcome

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

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