Volume 6, Issue 12, Pages (December 2014)

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Volume 6, Issue 12, Pages 1097-1106 (December 2014) Biomechanical Deficiencies in Women with Semitendinosus-Gracilis Anterior Cruciate Ligament Reconstruction During Drop Jumps Alexis Ortiz, PT, PhD, SCS, CSCS, Carmen E. Capo-Lugo, MSPT, Heidi L. Venegas-Rios, MS, DrPH PM&R Volume 6, Issue 12, Pages 1097-1106 (December 2014) DOI: 10.1016/j.pmrj.2014.07.003 Copyright © 2014 American Academy of Physical Medicine and Rehabilitation Terms and Conditions

Figure 1 Plug-in-gait Model Retro-reflective Marker Setting (Vicon Motion System, Denver, CO). PM&R 2014 6, 1097-1106DOI: (10.1016/j.pmrj.2014.07.003) Copyright © 2014 American Academy of Physical Medicine and Rehabilitation Terms and Conditions

Figure 2 Dynamic knee valgus was defined as the distance between markers placed at the lateral femoral epicondyles at initial contract minus minimum distance between these 2 markers. PM&R 2014 6, 1097-1106DOI: (10.1016/j.pmrj.2014.07.003) Copyright © 2014 American Academy of Physical Medicine and Rehabilitation Terms and Conditions

Figure 3 Adjusted means for dynamic knee valgus between groups per task. Although the group of women with semitendinosus-gracilis anterior cruciate ligament reconstruction (SG-ACLr) exhibited greater dynamic knee valgus, the results were not statistically significant. PM&R 2014 6, 1097-1106DOI: (10.1016/j.pmrj.2014.07.003) Copyright © 2014 American Academy of Physical Medicine and Rehabilitation Terms and Conditions

Figure 4 Adjusted means for rectified-normalized EMG MANOVAs were statistically significant during both tasks. Follow-up univariate analyses showed lower EMG activity for quadriceps and hamstrings muscle groups in the anterior cruciate ligament reconstruction (ACLr) group during the double-legged drop jump. Conversely, the electromyographic activity of the quadriceps was greater in the semitendinosus-gracilis anterior cruciate ligament reconstruction (SG-ACLr) group during the single-legged drop jump. PM&R 2014 6, 1097-1106DOI: (10.1016/j.pmrj.2014.07.003) Copyright © 2014 American Academy of Physical Medicine and Rehabilitation Terms and Conditions

Figure 5 The semitendinosus-gracilis anterior cruciate ligament reconstruction (SG-ACLr) group exhibited lower co-contraction ratios between quadriceps and hamstrings. However, statistically significant differences were found only during the single-legged drop jump. PM&R 2014 6, 1097-1106DOI: (10.1016/j.pmrj.2014.07.003) Copyright © 2014 American Academy of Physical Medicine and Rehabilitation Terms and Conditions

Figure 6 The group of women with semitendinosus-gracilis anterior cruciate ligament reconstruction (SG-ACLr) exhibited significantly less time to reach maximal activation of the quadriceps and hamstrings during the single-legged drop jump. PM&R 2014 6, 1097-1106DOI: (10.1016/j.pmrj.2014.07.003) Copyright © 2014 American Academy of Physical Medicine and Rehabilitation Terms and Conditions