Sports Med Rehabil J | Volume 6, Issue 1 | Research Article | Open Access
Mesnard G1 *, Fournier G1 , Cance N1 , Magnussen RA2,3, Lustig S1,4 and Servien E1,5
1Department of Orthopedics Surgery and Sports Medicine, FIFA Medical Center of Excellence, Croix-Rousse Hospital, Lyon University Hospital, France 2Department of Orthopedics, The Ohio State University, USA 3OSU Sports Medicine Research Institute, The Ohio State University, USA 4Univ Lyon, Claude Bernard Lyon 1 University, France 5LIBM - EA 7424, Interuniversity Laboratory of Biology of Mobility, Claude Bernard Lyon 1 University, France
*Correspondance to: Guillaume Mesnard
Fulltext PDFObjectives: The aim of this study is to assess pre-operative quadriceps and hamstring strength at various time points after ACL injury but prior to ACL reconstruction. We hypothesized that less side-to-side strength deficit would be noted at longer time points following ACL injury. Methods: One hundred patients underwent isokinetic muscle strength testing prior to planned ACL reconstruction. Patients were grouped based on time from injury to testing: <3 months (n=55), 3 to 6 months (n=31) and 6 to 12 months (n=14). Among these 3 groups, hamstring and quadriceps Limb Symmetry Index (LSI) and Hamstring/Quadriceps (H/Q) ratios were compared. Results: There were no significant differences between patients in the three groups in regards to age, BMI, or flexion range of motion, but there was a greater proportion of female patients in the 6 to 12 months group when compared to the other groups No significant differences in quadriceps or hamstring strength were noted among the three groups. H/Q ratio was significantly increased at 240°/s in the 6-to-12-month group when compared to earlier time points. No correlation was found between patient sex and LSI or H/Q ratios. Conclusion: Patients who underwent isokinetic muscle strength testing 6 to 12 months following ACL injury demonstrated a higher hamstring/quadriceps ratio at 240°/s that those who were testing within 6 months of injury, but no differences in hamstring or quadriceps LSI were noted based on time. Time-based criteria to allow for strength recovery prior to ACL surgery seems to be not recommended.
Anterior cruciate ligament; Reconstruction; Strength deficit; Muscle recovery
Mesnard G, Fournier G, Cance N, Magnussen RA, Lustig S, Servien E. Preoperative Variation of Quadriceps and Hamstrings Isokinetic Strength with Time from Injury to Anterior Cruciate Ligament Reconstruction. Sports Med Rehabil J. 2024;6(1):1055..