Brittney A Luc-Harkey1, Jason R Franz2, Anthony C Hackney3, J Troy Blackburn3, Darin A Padua3, Brian Pietrosimone3. 1. Neurological Clinical Research Institute, Department of Neurology, Massachusetts General Hospital, Boston, MA, United States of America. Electronic address: bharkey@mgh.harvard.edu. 2. Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill and North Carolina State University, Chapel Hill, NC, United States of America. 3. Department of Exercise and Sports Science, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States of America.
Abstract
BACKGROUND: Aberrant mechanical loading during gait is hypothesized to contribute to the development of posttraumatic osteoarthritis following anterior cruciate ligament reconstruction. Our purpose was to determine if peak vertical ground reaction force and instantaneous vertical ground reaction force loading rate associate with the acute change in serum cartilage oligomeric matrix protein following a 20-minute bout of walking. METHODS: We enrolled thirty individuals with a unilateral anterior cruciate ligament reconstruction. Peak vertical ground reaction force and instantaneous vertical ground reaction force loading rate were extracted from the first 50% of the stance phase of gait during a 60-second trial. Blood samples were collected immediately before and after 20 min of treadmill walking at self-selected speed. The change in serum cartilage oligomeric matrix protein from pre- to post-walking was calculated. Stepwise linear regression models were used to determine the association between each outcome of loading and the change in serum cartilage oligomeric matrix protein after accounting for sex, gait speed, time since anterior cruciate ligament reconstruction, graft type, and history of concomitant meniscal procedure (ΔR2). FINDINGS: Lesser peak vertical ground reaction force (ΔR2 = 0.208; β = -0.561; P = 0.019) and instantaneous vertical ground reaction force loading rate (ΔR2 = 0.168; β = -0.519; P = 0.037) on the anterior cruciate ligament reconstructed limb associated with a greater increase in serum cartilage oligomeric matrix protein following 20 min of walking. INTERPRETATION: Mechanical loading may be a future therapeutic target for altering the acute biochemical response to walking in individuals with an anterior cruciate ligament reconstruction.
BACKGROUND: Aberrant mechanical loading during gait is hypothesized to contribute to the development of posttraumatic osteoarthritis following anterior cruciate ligament reconstruction. Our purpose was to determine if peak vertical ground reaction force and instantaneous vertical ground reaction force loading rate associate with the acute change in serum cartilage oligomeric matrix protein following a 20-minute bout of walking. METHODS: We enrolled thirty individuals with a unilateral anterior cruciate ligament reconstruction. Peak vertical ground reaction force and instantaneous vertical ground reaction force loading rate were extracted from the first 50% of the stance phase of gait during a 60-second trial. Blood samples were collected immediately before and after 20 min of treadmill walking at self-selected speed. The change in serum cartilage oligomeric matrix protein from pre- to post-walking was calculated. Stepwise linear regression models were used to determine the association between each outcome of loading and the change in serum cartilage oligomeric matrix protein after accounting for sex, gait speed, time since anterior cruciate ligament reconstruction, graft type, and history of concomitant meniscal procedure (ΔR2). FINDINGS: Lesser peak vertical ground reaction force (ΔR2 = 0.208; β = -0.561; P = 0.019) and instantaneous vertical ground reaction force loading rate (ΔR2 = 0.168; β = -0.519; P = 0.037) on the anterior cruciate ligament reconstructed limb associated with a greater increase in serum cartilage oligomeric matrix protein following 20 min of walking. INTERPRETATION: Mechanical loading may be a future therapeutic target for altering the acute biochemical response to walking in individuals with an anterior cruciate ligament reconstruction.
Authors: Alyssa Evans-Pickett; Caroline Lisee; W Zachary Horton; David Lalush; Daniel Nissman; J Troy Blackburn; Jeffrey T Spang; Brian Pietrosimone Journal: Med Sci Sports Exerc Date: 2022-06-11
Authors: A Evans-Pickett; L Longobardi; J T Spang; R A Creighton; G Kamath; H C Davis-Wilson; R Loeser; J T Blackburn; B Pietrosimone Journal: Osteoarthritis Cartilage Date: 2021-03-27 Impact factor: 7.507
Authors: Steven A Garcia; Scott R Brown; Mary Koje; Chandramouli Krishnan; Riann M Palmieri-Smith Journal: J Orthop Res Date: 2021-06-14 Impact factor: 3.494