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Quadriceps strength symmetry predicts vertical ground reaction force symmetry during running in patients who have undergone ACL reconstruction |
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| Affiliation: | 1. Operational Readiness and Health Directorate, Naval Health Research Center, 140 Sylvester Road, San Diego, CA 92106-3521, USA;2. Military Population Health Directorate, Naval Health Research Center, San Diego, CA, USA;1. Occupational and Physical Therapy, Cincinnati Children''s Hospital Medical Center, United States;2. Motion Analysis Lab, Division of Occupational and Physical Therapy, Cincinnati Children''s Hospital Medical Center, United States;3. Doctor of Physical Therapy Program, San Diego State University, United States;4. Division of Sports Medicine, Cincinnati Children''s Hospital Medical Center, United States;5. College of Medicine, University of Cincinnati, United States;6. Shaw Sports Turf, Shaw Industries Group, Inc., Dalton, GA, United States;7. School of Exercise and Rehabilitation Sciences, The University of Toledo, United States;8. Department of Physical Therapy, Congdon School of Health Sciences, High Point University, United States |
| Abstract: | ObjectiveTo determine whether quadriceps strength symmetry can predict peak vertical ground reaction force (vGRF) running force symmetry in patients who have undergone ACL reconstruction (ACLR). We also sought to determine a cutoff for quadriceps strength symmetry to identify patients at risk for vGRF running asymmetry.DesignRetrospective cross-sectional.SettingClinical facility.MethodsBilateral quadriceps strength and vGRF data during running were obtained from 79 patients 26–30 weeks post ACLR. Linear regression was used to determine if quadriceps strength symmetry predicted peak vGRF running force symmetry. Classification and regression tree (CART) analysis was used to determine the cutoff value for quadriceps strength symmetry to identify patients at risk for vGRF running asymmetry.ResultsIncreased quadriceps strength symmetry predicted increased vGRF running symmetry (R2 = 0.20). CART analysis revealed that patients with quadriceps strength symmetry less than or equal to 88% were at highest risk for vGRF running asymmetry (R2 = 26%).ConclusionGreater quadriceps strength symmetry is predictive of greater vGRF running force symmetry in patients who have undergone ACLR. This finding highlights the need for clinicians to consider the degree of quadriceps strength symmetry before initiating a return to running program. |
| Keywords: | Quadriceps strength asymmetry Return to running Knee osteoarthritis Biomechanics |
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