Fourier Analysis of the Vertical Ground Reaction Force During Walking: Applications for Quantifying Differences in Gait Strategies
This study examines the utility of different quantitative methods to distinguish vertical ground reaction forces (VGRFs) from experimentally distinct gait strategies. The goals of this study are to compare measures of VGRF data-using the shape factor method and a Fourier series-based analysis-to (1) describe how these methods reflect and distinguish gait patterns and (2) determine which Fourier series coefficients discriminate normal walking, with a relatively stiff-legged gait, from compliant walking, using deep knee flexion and limited vertical oscillation. This study includes a reanalysis of previously presented VGRF da...
Source: Journal of Applied Biomechanics - April 12, 2024 Category: Sports Medicine Authors: Taylor P Trentadue Daniel Schmitt Source Type: research
Comparing Knee Kinetics and Kinematics in Healthy Individuals and Those With Knee Osteoarthritis, With and Without Flat Feet
This study aimed to investigate the knee kinetics, kinematics, pain, and physical function in individuals with moderate symptomatic KOA, in comparison to asymptomatic control participants. Thirty volunteers with moderate KOA (with flat feet n = 15, with normal feet n = 15) and 30 asymptomatic people (with flat feet n = 15, with normal feet n = 15) were evaluated. The knee adduction angular impulse, knee flexion moment, knee flexion angular impulse, and knee flexion angle were measured during level walking. The pain was assessed in patients with KOA. The study found that individuals with KOA had a significant increase in th...
Source: Journal of Applied Biomechanics - April 12, 2024 Category: Sports Medicine Authors: Maryam Sohrabi Giti Torkaman Fariba Bahrami Source Type: research
Fourier Analysis of the Vertical Ground Reaction Force During Walking: Applications for Quantifying Differences in Gait Strategies
This study examines the utility of different quantitative methods to distinguish vertical ground reaction forces (VGRFs) from experimentally distinct gait strategies. The goals of this study are to compare measures of VGRF data-using the shape factor method and a Fourier series-based analysis-to (1) describe how these methods reflect and distinguish gait patterns and (2) determine which Fourier series coefficients discriminate normal walking, with a relatively stiff-legged gait, from compliant walking, using deep knee flexion and limited vertical oscillation. This study includes a reanalysis of previously presented VGRF da...
Source: Journal of Applied Biomechanics - April 12, 2024 Category: Sports Medicine Authors: Taylor P Trentadue Daniel Schmitt Source Type: research
Comparing Knee Kinetics and Kinematics in Healthy Individuals and Those With Knee Osteoarthritis, With and Without Flat Feet
This study aimed to investigate the knee kinetics, kinematics, pain, and physical function in individuals with moderate symptomatic KOA, in comparison to asymptomatic control participants. Thirty volunteers with moderate KOA (with flat feet n = 15, with normal feet n = 15) and 30 asymptomatic people (with flat feet n = 15, with normal feet n = 15) were evaluated. The knee adduction angular impulse, knee flexion moment, knee flexion angular impulse, and knee flexion angle were measured during level walking. The pain was assessed in patients with KOA. The study found that individuals with KOA had a significant increase in th...
Source: Journal of Applied Biomechanics - April 12, 2024 Category: Sports Medicine Authors: Maryam Sohrabi Giti Torkaman Fariba Bahrami Source Type: research
Fourier Analysis of the Vertical Ground Reaction Force During Walking: Applications for Quantifying Differences in Gait Strategies
This study examines the utility of different quantitative methods to distinguish vertical ground reaction forces (VGRFs) from experimentally distinct gait strategies. The goals of this study are to compare measures of VGRF data-using the shape factor method and a Fourier series-based analysis-to (1) describe how these methods reflect and distinguish gait patterns and (2) determine which Fourier series coefficients discriminate normal walking, with a relatively stiff-legged gait, from compliant walking, using deep knee flexion and limited vertical oscillation. This study includes a reanalysis of previously presented VGRF da...
Source: Journal of Applied Biomechanics - April 12, 2024 Category: Sports Medicine Authors: Taylor P Trentadue Daniel Schmitt Source Type: research
Comparing Knee Kinetics and Kinematics in Healthy Individuals and Those With Knee Osteoarthritis, With and Without Flat Feet
This study aimed to investigate the knee kinetics, kinematics, pain, and physical function in individuals with moderate symptomatic KOA, in comparison to asymptomatic control participants. Thirty volunteers with moderate KOA (with flat feet n = 15, with normal feet n = 15) and 30 asymptomatic people (with flat feet n = 15, with normal feet n = 15) were evaluated. The knee adduction angular impulse, knee flexion moment, knee flexion angular impulse, and knee flexion angle were measured during level walking. The pain was assessed in patients with KOA. The study found that individuals with KOA had a significant increase in th...
Source: Journal of Applied Biomechanics - April 12, 2024 Category: Sports Medicine Authors: Maryam Sohrabi Giti Torkaman Fariba Bahrami Source Type: research
The Midfoot Joint Complex (Foot Arch) Contributes to the Upper Body Position in Bipedal Walking and Coordinates With the Lower Limb Joints
This study estimated the contribution of the midfoot joint complex (MJC) kinematics to the pelvis anterior-posterior positions during the stance phase of walking and investigated whether the MJC is functionally coordinated with the lower limb joints to maintain similar pelvic positions across steps. Hip, knee, ankle, and MJC sagittal angles were measured in 11 nondisabled participants during walking. The joints' contributions to pelvic positions were computed through equations derived from a link-segment model. Functional coordination across steps was identified when the MJC contribution to pelvic position varied and the s...
Source: Journal of Applied Biomechanics - April 11, 2024 Category: Sports Medicine Authors: Leonardo D Barsante Paula M M Arantes Daniela V Vaz Fabricio A Magalh ães Diego S Carvalho Aline C Cruz Renan A Resende Juliana M Ocarino S érgio T Fonseca Thales R Souza Source Type: research
Force-Time Characteristics of Repeated Bouts of Depth Jumps and the Effects of Compression Garments
J Appl Biomech. 2024 Apr 5:1-15. doi: 10.1123/jab.2023-0221. Online ahead of print.ABSTRACTNo studies have reported ground reaction force (GRF) profiles of the repeated depth jump (DJ) protocols commonly used to study exercise-induced muscle damage. Furthermore, while compression garments (CG) may accelerate recovery from exercise-induced muscle damage, any effects on the repeated bout effect are unknown. Therefore, we investigated the GRF profiles of 2 repeated bouts of damage-inducing DJs and the effects of wearing CG for recovery. Nonresistance-trained males randomly received CG (n = 9) or placebo (n = 8) for 72 hours r...
Source: Journal of Applied Biomechanics - April 5, 2024 Category: Sports Medicine Authors: Freddy Brown Matt Hill Derek Renshaw Jason Tallis Source Type: research
Dr Charles J. (Chuck) Dillman: A Remembrance
J Appl Biomech. 2024 Mar 13;40(2):81-90. doi: 10.1123/jab.2023-0300. Print 2024 Apr 1.ABSTRACTIn August 2023, the biomechanics community suffered a significant loss with the death of Dr Charles J. Dillman. His work in the area of sport biomechanics was groundbreaking. In this tribute, 10 former students and 9 former colleagues remember "Chuck" and his impact on their lives, careers, and the field of biomechanics.PMID:38479378 | DOI:10.1123/jab.2023-0300 (Source: Journal of Applied Biomechanics)
Source: Journal of Applied Biomechanics - March 13, 2024 Category: Sports Medicine Authors: Robert Shapiro Robert Gregor John Challis Source Type: research
