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https://www.readbyqxmd.com/read/28445855/speed-dependent-effects-of-laterally-wedged-insoles-on-gait-biomechanics-in-healthy-subjects
#1
Felix Kluge, Sebastian Krinner, Matthias Lochmann, Bjoern M Eskofier
Laterally wedged insoles have been shown to be effective for the reduction of the knee adduction moment and other biomechanical variables that are associated with the pathogenesis of knee osteoarthritis. However, inconclusive results such as adverse effects in individual subjects or even no group-wise wedge effects have been presented in different studies and it has been suggested to identify variables that potentially confound the wedge effect. The main objective of this study was the investigation of interaction effects of lateral wedges with walking speed, as different self-selected speeds have mainly been used in previous studies...
April 9, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28437781/the-reliability-and-criterion-validity-of-2d-video-assessment-of-single-leg-squat-and-hop-landing
#2
Lee Herrington, Faisal Alenezi, Msaad Alzhrani, Hasan Alrayani, Richard Jones
The objective was to assess the intra-tester, within and between day reliability of measurement of hip adduction (HADD) and frontal plane projection angles (FPPA) during single leg squat (SLS) and single leg landing (SLL) using 2D video and the validity of these measurements against those found during 3D motion capture. 15 healthy subjects had their SLS and SLL assessed using 3D motion capture and video analysis. Inter-tester reliability for both SLS and SLL when measuring FPPA and HADD show excellent correlations (ICC2,1 0...
April 17, 2017: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/28437130/lower-limb-and-trunk-biomechanics-after-fatigue-in-competitive-female-irish-dancers
#3
Catherine Y Wild, Avril Grealish, Diana Hopper
CONTEXT:   Because of the increasing popularity of participation in Irish dance, the incidence of lower limb injuries is high among this competitive population. OBJECTIVE:   To investigate the effects of fatigue on the peak lower limb and trunk angles as well as the peak lower limb joint forces and moments of competitive female Irish dancers during the performance of a dance-specific single-limb landing. DESIGN:   Cross-sectional study...
April 24, 2017: Journal of Athletic Training
https://www.readbyqxmd.com/read/28436878/biofeedback-for-gait-retraining-based-on-real-time-estimation-of-tibiofemoral-joint-contact-forces
#4
Claudio Pizzolato, Monica Reggiani, David J Saxby, Elena Ceseracciu, Luca Modenese, David G Lloyd
Biofeedback assisted rehabilitation and intervention technologies have the potential to modify clinically relevant biomechanics. Gait retraining has been used to reduce the knee adduction moment, a surrogate of medial tibiofemoral joint loading often used in knee osteoarthritis research. In this study we present an electromyogram-driven neuromusculoskeletal model of the lower-limb to estimate, in real-time, the tibiofemoral joint loads. The model included 34 musculotendon units spanning the hip, knee, and ankle joints...
April 18, 2017: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/28433387/how-do-rocker-soled-shoes-influence-the-knee-adduction-moment-in-people-with-knee-osteoarthritis-an-analysis-of-biomechanical-mechanisms
#5
Elizabeth G Madden, Crystal O Kean, Tim V Wrigley, Kim L Bennell, Rana S Hinman
The primary objective was to examine mechanisms behind previously observed changes in the knee adduction moment (KAM) with rocker-soled shoes, in participants sub-grouped according to whether they experienced an immediate decrease, or increase, in peak KAM. In subgroups where frontal plane knee ground reaction force (GRF) lever-arm emerged as a significant predictor, a secondary aim was to examine biomechanical factors that contributed to change in this parameter. Thirty individuals with symptomatic, radiographic knee osteoarthritis (OA) underwent 3D gait analysis in unstable rocker-soled shoes and non-rocker-soled shoes...
April 9, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28419809/knee-biomechanics-during-jogging-after-arthroscopic-partial-meniscectomy-a-longitudinal-study
#6
Michelle Hall, Tim V Wrigley, Ben R Metcalf, Rana S Hinman, Flavia M Cicuttini, Alasdair R Dempsey, David G Lloyd, Kim L Bennell
BACKGROUND: Altered knee joint biomechanics is thought to play a role in the pathogenesis of knee osteoarthritis and has been reported in patients after arthroscopic partial meniscectomy (APM) while performing various activities. Longitudinally, understanding knee joint biomechanics during jogging may assist future studies to assess the implications of jogging on knee joint health in this population. PURPOSE: To investigate knee joint biomechanics during jogging in patients 3 months after APM and a healthy control group at baseline and 2 years later at follow-up...
April 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28379692/selective-co2-sequestration-with-monolithic-bimodal-micro-macroporous-carbon-aerogels-derived-from-stepwise-pyrolytic-decomposition-of-polyamide-polyimide-polyurea-random-copolymers
#7
Adnan M Saeed, Parwani M Rewatkar, Hojat Majedi Far, Tahereh Taghvaee, Suraj Donthula, Chandana Mandal, Chariklia Sotiriou-Leventis, Nicholas Leventis
Polymeric aerogels (PA-xx) were synthesized via room-temperature reaction of an aromatic triisocyanate (tris(4-isocyanatophenyl) methane) with pyromellitic acid. Using solid-state CPMAS (13)C and (15)N NMR, it was found that the skeletal framework of PA-xx was a statistical copolymer of polyamide, polyurea, polyimide, and of the primary condensation product of the two reactants, a carbamic-anhydride adduct. Stepwise pyrolytic decomposition of those components yielded carbon aerogels with both open and closed microporosity...
April 5, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28347597/does-standing-limb-alignment-after-total-knee-arthroplasty-predict-dynamic-alignment-and-knee-loading-during-gait
#8
Charles Rivière, Matthieu Ollivier, Damien Girerd, Jean Noël Argenson, Sébastien Parratte
BACKGROUND: A principle of TKA is to achieve a neutral standing coronal alignment of the limb (HKA angle) to reduce risks of implant loosening, reduce polyethylene wear, and optimize patellar tracking. Several long-term studies have questioned this because the relationship between alignment and implant survivorship is weaker than previously reported. We hypothesize that standing HKA poorly predicts implant failure because it does not predict dynamic HKA, dynamic adduction moment, and loading of the knee during gait...
March 24, 2017: Knee
https://www.readbyqxmd.com/read/28339815/relationships-between-standing-frontal-plane-knee-alignment-and-dynamic-knee-joint-loading-during-walking-and-jogging-in-youth-who-are-obese
#9
Matthew S Briggs, Sharon Bout-Tabaku, Michael P McNally, Ajit M W Chaudhari, Thomas M Best, Laura C Schmitt
Background: Youth who are obese have high risk of poor knee health and cartilage damage. Understanding factors which may affect knee health in youth who are obese is critical for preservation of knee integrity and function. Objective: Compare standing frontal plane knee alignment and knee loading patterns between youth who are obese and healthy-weight and determine the association between knee alignment and knee loading patterns during walking and jogging. Design: Cross sectional matched-pair...
February 28, 2017: Physical Therapy
https://www.readbyqxmd.com/read/28323351/baseline-knee-adduction-moment-interacts-with-body-mass-index-to-predict-loss-of-medial-tibial-cartilage-volume-over-2-5-years-in-knee-osteoarthritis
#10
Nicholas M Brisson, Emily G Wiebenga, Paul W Stratford, Karen A Beattie, Saara Totterman, José G Tamez-Peña, Jack P Callaghan, Jonathan D Adachi, Monica R Maly
This study aimed to determine the extent to which changes over 2.5 years in medial knee cartilage thickness and volume were predicted by: (1) Peak values of the knee adduction (KAM) and flexion moments; and (2) KAM impulse and loading frequency, representing cumulative load, after controlling for age, sex and body mass index (BMI). Adults with clinical knee osteoarthritis participated. At baseline and approximately 2.5 years follow-up, cartilage thickness and volume of the medial tibia and femur were segmented from magnetic resonance imaging scans...
March 21, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28301825/combined-versus-individual-effects-of-a-valgus-knee-brace-and-lateral-wedge-foot-orthotic-during-stair-use-in-patients-with-knee-osteoarthritis
#11
Rebecca Moyer, Trevor Birmingham, Colin Dombroski, Robert Walsh, J Robert Giffin
The aim of this study was to investigate the combined and individual biomechanical effects of a valgus knee brace and a lateral wedge foot orthotic during stair ascent and descent in patients with knee osteoarthritis (OA). Thirty-five patients with varus alignment and medial knee OA were prescribed a custom valgus knee brace and lateral wedge foot orthotic. Knee angles and moments in the frontal and sagittal planes were determined from 3D gait analysis completed under four randomized conditions: (1) control (no knee brace or foot orthotic), (2) knee brace, (3) foot orthotic, and (4) combined knee brace and foot orthotic...
March 1, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28242569/uphill-walking-biomechanical-demand-on-the-lower-extremities-of-obese-adolescents
#12
Gerda Strutzenberger, Nathalie Alexander, Dominik Bamboschek, Elisabeth Claas, Helmut Langhof, Hermann Schwameder
The number of obesity prevalence in adolescents is still increasing. Obesity treatment programs typically include physical activity with walking being recommended as appropriate activity, but limited information exists on the demand uphill walking places on the joint loading and power of obese adolescents. Therefore, the purpose of this study was to investigate the effect of different inclinations on step characteristics, sagittal and frontal joint angles, joint moments and joint power of obese adolescents in comparison to their normal-weight peers...
February 20, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28237873/combined-effect-of-toe-out-gait-and-high-tibial-osteotomy-on-knee-adduction-moment-in-patients-with-varus-knee-deformity
#13
C Whelton, A Thomas, D W Elson, A Metcalfe, S Forrest, C Wilson, C Holt, G Whatling
BACKGROUND: Gait adaptations, including toe out gait, have been proposed as treatments for knee osteoarthritis. The clinical application of toe out gait, however, is unclear. This study aims to identify the changes in Knee adduction moment in varus knee deformity assessing toe out gait as an alternative to high tibial osteotomy, and if any change in dynamic loading persists post operatively, when anatomical alignment is restored. METHODS: Three-dimensional motion analysis was performed on 17 patients with medial compartment knee osteoarthritis and varus deformity prior to undergoing high tibial osteotomy, 13 patients were assessed post-operatively, and results compared to 13 healthy controls...
February 14, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/28237655/a-prospective-comparison-of-lower-extremity-kinematics-and-kinetics-between-injured-and-non-injured-collegiate-cross-country-runners
#14
Robert I Dudley, Derek N Pamukoff, Scott K Lynn, Robert D Kersey, Guillermo J Noffal
Collegiate cross country runners are at risk for running related injuries (RRI) due to high training volume and the potential for aberrant lower extremity biomechanics. However, there is a need for prospective research to determine biomechanical risk factors for RRI. The purpose of this study was to prospectively compare ankle, knee, and hip kinematics and kinetics and ground reaction force characteristics between injured and non-injured cross country runners over a 14-week season. Biomechanical running analyses were conducted on 31 collegiate-cross country runners using a 3-dimensional motion capture system and force plate prior to the start of the season...
February 23, 2017: Human Movement Science
https://www.readbyqxmd.com/read/28226296/the-relationship-between-external-knee-moments-and-muscle-co-activation-in-subjects-with-medial-knee-osteoarthritis
#15
Luiz Fernando Approbato Selistre, Stela Márcia Mattiello, Theresa Helissa Nakagawa, Glaucia Helena Gonçalves, Marina Petrella, Richard Keith Jones
PURPOSE: External knee moments are reliable to measure knee load but it does not take into account muscle activity. Considering that muscle co-activation increases compressive forces at the knee joint, identifying relationships between muscle co-activations and knee joint load would complement the investigation of the knee loading in subjects with knee osteoarthritis. The purpose of this study was to identify relationships between muscle co-activation and external knee moments during walking in subjects with medial knee osteoarthritis...
January 18, 2017: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/28222331/the-moro-reaction-more-than-a-reflex-a-ritualized-behavior-of-nonverbal-communication
#16
Pierre V Rousseau, Florence Matton, Renaud Lecuyer, Willy Lahaye
OBJECTIVE: To propose a phylogenetic significance to the Moro reflex which remains unexplained since its publication in 1918 because both hands are free at the end of the gesture. METHOD: Among the 75 videos of healthy term newborns we have filmed in a research project on antenatal education to parenthood, we describe a sequence that clearly showed the successive movements of the Moro reflex and we report the occurrence of this reflex in the videos that were recorded from Time 0 of birth defined as the moment that lies between the birth of the thorax and the pelvis of the infant...
February 18, 2017: Infant Behavior & Development
https://www.readbyqxmd.com/read/28222057/effects-of-toe-in-and-wider-step-width-in-stair-ascent-with-different-knee-alignments
#17
Hunter J Bennett, Songning Zhang, Guangping Shen, Joshua T Weinhandl, Max R Paquette, Jeffrey Reinbolt, Dawn P Coe
PURPOSE: Toe-in (TI) and toe-in with wider step width (TIW) gait modifications have successfully reduced the internal peak knee adduction moment (KAM) during level walking and stair ascent tasks, respectively, for healthy and knee osteoarthritis populations. However, the concurrent effects of these modifications have not previously been combined to reduce both the first and the second peak KAM during stair ascent or tested among the different knee alignment groups. Therefore, the purpose of this study was to examine effects of TI and TIW gait modifications on knee biomechanics during stair ascent in individuals with varus, neutral, and valgus knee alignments...
March 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28189095/effects-of-toe-out-and-toe-in-gait-with-varying-walking-speeds-on-knee-joint-mechanics-and-lower-limb-energetics
#18
Soobia Saad Khan, Saad Jawaid Khan, Juliana Usman
Toe-out/-in gait has been prescribed in reducing knee joint load to medial knee osteoarthritis patients. This study focused on the effects of toe-out/-in at different walking speeds on first peak knee adduction moment (fKAM), second peak KAM (sKAM), knee adduction angular impulse (KAAI), net mechanical work by lower limb as well as joint-level contribution to the total limb work during level walking. Gait analysis of 20 healthy young adults was done walking at pre-defined normal (1.18m/s), slow (0.85m/s) and fast (1...
March 2017: Gait & Posture
https://www.readbyqxmd.com/read/28174605/plug-in-gait-calculation-of-the-knee-adduction-moment-in-people-with-knee-osteoarthritis-during-shod-walking-comparison-of-two-different-foot-marker-models
#19
Kade L Paterson, Rana S Hinman, Ben R Metcalf, Kim L Bennell, Tim V Wrigley
BACKGROUND: Understanding how kinematic multi-segment foot modelling influences the utility of Plug-in-Gait calculations of the knee adduction moment (KAM) during shod walking is relevant to knee osteoarthritis (OA). Multi-segment foot markers placed on the skin through windows cut in to the shoe provide a more accurate representation of foot mechanics than the traditional marker set used by Plug-in-Gait, which uses fewer markers, placed on the shoe itself. We aimed to investigate whether Plug-in-Gait calculation of the KAM differed when using a kinematic multi-segment foot model compared to the traditional Plug-in-Gait marker set...
2017: Journal of Foot and Ankle Research
https://www.readbyqxmd.com/read/28173989/analysis-of-the-factors-that-correlate-with-increased-knee-adduction-moment-during-gait-in-the-early-postoperative-period-following-total-knee-arthroplasty
#20
Takeo Nagura, Yasuo Niki, Kengo Harato, Takeshi Mochizuki, Yoshimori Kiriyama
BACKGROUND: Analysis of dynamic knee loading during gait is essential to prevent mechanical failures following total knee arthroplasty. External knee adduction moment during gait is the primary factor producing medial joint reaction force, and an increase in the moment is directly related to an increase in the medial compartment load on the knee. METHODS: Knee adduction moment during gait in 39 knees of 32 female patients following a posterior stabilized knee replacement with a single surgeon was evaluated at 1...
February 4, 2017: Knee
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