Alyssa Evans-Pickett1, Hope C Davis-Wilson2, Brittney A Luc-Harkey3, J Troy Blackburn2, Jason R Franz4, Darin A Padua2, Matthew K Seeley5, Brian Pietrosimone2. 1. MOTION Science Institute, Department of Exercise and Sport Science, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States; Human Movement Science Curriculum, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States. Electronic address: alyssa7evans@unc.edu. 2. MOTION Science Institute, Department of Exercise and Sport Science, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States; Human Movement Science Curriculum, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States. 3. Neurological Clinical Research Institute, Department of Neurology, Massachusetts General Hospital, Boston, MA, United States. 4. Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill and North Carolina State University, NC, United States. 5. Department of Exercise Sciences, Brigham Young University, Provo, UT, United States.
Abstract
BACKGROUND: We aimed to determine the effect of cueing an increase or decrease in the vertical ground reaction force impact peak (peak in the first 50% of stance) on vertical ground reaction force, knee flexion angle, internal knee extension moment, and internal knee abduction moment waveforms throughout stance in individuals 6-12 months after an anterior cruciate ligament reconstruction. METHODS: Twelve individuals completed 3 conditions (High, Low, and Control) where High and Low Conditions cue a 5% body weight increase or decrease, respectively, in the vertical ground reaction force impact peak compared to usual walking. Biomechanics during High and Low Conditions were compared to the Control Condition throughout stance. FINDINGS: The High Condition resulted in: (a) increased vertical ground reaction forces at each peak and decreased during mid-stance, (b) greater knee excursion (i.e., greater knee flexion angle in early stance and a more extended knee in late stance), (c) greater internal extension moment for the majority of stance, and (d) lesser second internal knee abduction moment peak. The Low Condition resulted in: (a) vertical ground reaction forces decreased during early stance and increased during mid-stance, (b) decreased knee excursion, (c) increased internal extension moment throughout stance, and (d) decreased internal knee abduction moment peaks. INTERPRETATION: Cueing a 5% body weight increase in vertical ground reaction force impact peak resulted in a more dynamic vertical ground reaction force loading pattern, increased knee excursion, and a greater internal extension moment during stance which may be useful in restoring gait patterns following anterior cruciate ligament reconstruction.
BACKGROUND: We aimed to determine the effect of cueing an increase or decrease in the vertical ground reaction force impact peak (peak in the first 50% of stance) on vertical ground reaction force, knee flexion angle, internal knee extension moment, and internal knee abduction moment waveforms throughout stance in individuals 6-12 months after an anterior cruciate ligament reconstruction. METHODS: Twelve individuals completed 3 conditions (High, Low, and Control) where High and Low Conditions cue a 5% body weight increase or decrease, respectively, in the vertical ground reaction force impact peak compared to usual walking. Biomechanics during High and Low Conditions were compared to the Control Condition throughout stance. FINDINGS: The High Condition resulted in: (a) increased vertical ground reaction forces at each peak and decreased during mid-stance, (b) greater knee excursion (i.e., greater knee flexion angle in early stance and a more extended knee in late stance), (c) greater internal extension moment for the majority of stance, and (d) lesser second internal knee abduction moment peak. The Low Condition resulted in: (a) vertical ground reaction forces decreased during early stance and increased during mid-stance, (b) decreased knee excursion, (c) increased internal extension moment throughout stance, and (d) decreased internal knee abduction moment peaks. INTERPRETATION: Cueing a 5% body weight increase in vertical ground reaction force impact peak resulted in a more dynamic vertical ground reaction force loading pattern, increased knee excursion, and a greater internal extension moment during stance which may be useful in restoring gait patterns following 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: Caroline Lisee; Hope C Davis-Wilson; Alyssa Evans-Pickett; W Zachary Horton; J Troy Blackburn; Jason R Franz; Louise M Thoma; Jeffrey T Spang; Brian G Pietrosimone Journal: Med Sci Sports Exerc Date: 2022-01-24
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