Explosive Quadriceps Strength and Landing Mechanics in Females with and without Anterior Cruciate Ligament Reconstruction

Yu-Lun Huang, Eunwook Chang, Samuel T. Johnson, Christine D. Pollard, Mark A. Hoffman and Marc F. Norcross
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Yu-Lun Huang: Department of Kinesiology, College of Education and Human Sciences, University of Wisconsin–Eau Claire, Eau Claire, WI 54702, USA
Eunwook Chang: Department of Kinesiology, Inha University, Incheon 22212, Korea
Samuel T. Johnson: School of Biological and Population Health Sciences, College of Public Health and Human Sciences, Oregon State University, Corvallis, OR 97331, USA
Christine D. Pollard: School of Biological and Population Health Sciences, College of Public Health and Human Sciences, Oregon State University-Cascades, Bend, OR 97701, USA
Mark A. Hoffman: School of Biological and Population Health Sciences, College of Public Health and Human Sciences, Oregon State University, Corvallis, OR 97331, USA
Marc F. Norcross: School of Biological and Population Health Sciences, College of Public Health and Human Sciences, Oregon State University, Corvallis, OR 97331, USA

IJERPH, 2020, vol. 17, issue 20, 1-13

Abstract: Lower explosive quadriceps strength, quantified as rate of torque development (RTD), may contribute to landing mechanics associated with anterior cruciate ligament (ACL) injury risk. However, the association between quadriceps RTD and landing mechanics during high demand tasks remains unclear. Therefore, this study investigated the influence of quadriceps RTD on sagittal plane landing mechanics during double-leg jump landings (DLJL) and single-leg jump cuts (SLJC) in females with and without ACL reconstruction (ACLR). Quadriceps RTD was measured during isometric muscle contractions. Landing mechanics were collected during DLJL and SLJC tasks. Separate stepwise multiple linear regression models determined the amount of variance in sagittal plane landing mechanics that could be explained by quadriceps RTD, group (ACLR or Control), and their interaction. The results indicate that greater quadriceps RTD is associated with lower loading rate ( p = 0.02) and longer time to peak vertical ground reaction force ( p = 0.001) during SLJC, regardless of ACLR status. As greater loading rate may lead to higher risk of ACL injuries and post-traumatic knee osteoarthritis post-ACLR, explosive muscle strength interventions might be useful for individuals with and without ACLR to facilitate the use of safer landing mechanics.

Keywords: loading rate; osteoarthritis; quadriceps function (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2020
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