Faculty Opinions recommendation of Decreased knee adduction moment does not guarantee decreased medial contact force during gait.

2010 ◽  
Author(s):  
John Sandy ◽  
Najia Shakoor
Keyword(s):  
Contact Force ◽  
Knee Adduction Moment

scholarly journals Immediate Effects of Medially Posted Insoles on Lower Limb Joint Contact Forces in Adult Acquired Flatfoot: A Pilot Study

2020 ◽  
Vol 17 (7) ◽  
pp. 2226 ◽  
Author(s):  
Yinghu Peng ◽  
Duo Wai-Chi Wong ◽  
Yan Wang ◽  
Tony Lin-Wei Chen ◽  
Qitao Tan ◽  
...  
Keyword(s):  
Contact Force ◽  
Lower Limb ◽  
Random Order ◽  
Contact Forces ◽  
Knee Adduction Moment ◽  
Joint Mechanics ◽  
Joint Force ◽  
Ankle Eversion ◽  
Peak Knee ◽  
Joint Contact

Flatfoot is linked to secondary lower limb joint problems, such as patellofemoral pain. This study aimed to investigate the influence of medial posting insoles on the joint mechanics of the lower extremity in adults with flatfoot. Gait analysis was performed on fifteen young adults with flatfoot under two conditions: walking with shoes and foot orthoses (WSFO), and walking with shoes (WS) in random order. The data collected by a vicon system were used to drive the musculoskeletal model to estimate the hip, patellofemoral, ankle, medial and lateral tibiofemoral joint contact forces. The joint contact forces in WSFO and WS conditions were compared. Compared to the WS group, the second peak patellofemoral contact force (p < 0.05) and the peak ankle contact force (p < 0.05) were significantly lower in the WSFO group by 10.2% and 6.8%, respectively. The foot orthosis significantly reduced the peak ankle eversion angle (p < 0.05) and ankle eversion moment (p < 0.05); however, the peak knee adduction moment increased (p < 0.05). The reduction in the patellofemoral joint force and ankle contact force could potentially inhibit flatfoot-induced lower limb joint problems, despite a greater knee adduction moment.

scholarly journals Estimation of the Knee Adduction Moment and Joint Contact Force during Daily Living Activities Using Inertial Motion Capture

Sensors ◽  
2019 ◽  
Vol 19 (7) ◽  
pp. 1681 ◽  
Author(s):  
Jason Konrath ◽  
Angelos Karatsidis ◽  
H. Schepers ◽  
Giovanni Bellusci ◽  
Mark de Zee ◽  
...  
Keyword(s):  
Motion Capture ◽  
Contact Force ◽  
Daily Living ◽  
Contact Forces ◽  
Knee Adduction Moment ◽  
Inertial Motion ◽  
Daily Living Activities ◽  
Tibiofemoral Joint ◽  
Joint Contact Force ◽  
Joint Contact

Knee osteoarthritis is a major cause of pain and disability in the elderly population with many daily living activities being difficult to perform as a result of this disease. The present study aimed to estimate the knee adduction moment and tibiofemoral joint contact force during daily living activities using a musculoskeletal model with inertial motion capture derived kinematics in an elderly population. Eight elderly participants were instrumented with 17 inertial measurement units, as well as 53 opto-reflective markers affixed to anatomical landmarks. Participants performed stair ascent, stair descent, and sit-to-stand movements while both motion capture methods were synchronously recorded. A musculoskeletal model containing 39 degrees-of-freedom was used to estimate the knee adduction moment and tibiofemoral joint contact force. Strong to excellent Pearson correlation coefficients were found for the IMC-derived kinematics across the daily living tasks with root mean square errors (RMSE) between 3° and 7°. Furthermore, moderate to strong Pearson correlation coefficients were found in the knee adduction moment and tibiofemoral joint contact forces with RMSE between 0.006–0.014 body weight × body height and 0.4 to 1 body weights, respectively. These findings demonstrate that inertial motion capture may be used to estimate knee adduction moments and tibiofemoral contact forces with comparable accuracy to optical motion capture.

KNEE ADDUCTION MOMENT AND MEDIAL CONTACT FORCE – FACTS ABOUT THE CORRELATION DURING GAIT

2012 ◽  
Vol 45 ◽  
pp. S381
Author(s):  
Ines Kutzner ◽  
Adam Trepczynski ◽  
Markus Heller ◽  
Georg Bergmann
Keyword(s):  
Contact Force ◽  
Knee Adduction Moment

Toe-Out Gait Decreases the Second Peak of the Medial Knee Contact Force

2015 ◽  
Vol 31 (4) ◽  
pp. 275-280 ◽  
Author(s):  
Shinya Ogaya ◽  
Hisashi Naito ◽  
Akira Iwata ◽  
Yumi Higuchi ◽  
Satoshi Fuchioka ◽  
...  
Keyword(s):  
Contact Force ◽  
Simulation Analysis ◽  
Cartilage Damage ◽  
Reaction Force ◽  
Muscle Tension ◽  
Contact Forces ◽  
Knee Adduction Moment ◽  
Joint Reaction Force ◽  
Medial Knee ◽  
Second Peak

Toe-out angle alternation is a potential tactic for decreasing the knee adduction moment during walking. Published reports have not examined the medial knee contact force during the toe-out gait, although it is a factor affecting knee articular cartilage damage. This study investigated the effects of increased toe-out angle on the medial knee contact force, using musculoskeletal simulation analysis. For normal and toe-out gaits in 18 healthy subjects, the muscle tension forces were simulated based on the joint moments and ground reaction forces with optimization process. The medial knee contact force during stance phase was determined using the sum of the muscle force and joint reaction force components. The first and second peaks of the medial knee contact force were compared between the gaits. The toe-out gait showed a significant decrease in the medial knee contact force at the second peak, compared with the normal gait. In contrast, the medial knee contact forces at the first peak were not significantly different between the gaits. These results suggest that the toe-out gait is beneficial for decreasing the second peak of the medial knee contact force.

Changes in Medial Knee Contact Force Through Gait Modification

2012 ◽  
Author(s):  
Allison L. Hall ◽  
Thor F. Besier ◽  
Amy Silder ◽  
Scott L. Delp ◽  
Darryl D. D’Lima ◽  
...  
Keyword(s):  
Contact Force ◽  
Treatment Strategies ◽  
Medial Compartment ◽  
Knee Adduction Moment ◽  
Medial Knee ◽  
Non Invasive ◽  
Trunk Sway ◽  
Invasive Method ◽  
Gait Modification ◽  
External Knee Adduction Moment

The development of medial knee osteoarthritis (OA) has been attributed to overloading of the medial compartment articular cartilage [1]. Therefore, treatment strategies are often focused on reducing medial compartment loads. Gait modification represents a non-invasive method for achieving this goal. Previous studies have shown that a variety of gait modifications (e.g., toeing out, increased medial-lateral trunk sway, walking with medialized knees (i.e., medial thrust gait)) are effective in reducing the external knee adduction moment [e.g., 2–4]. Although the external knee adduction moment is often used as a surrogate measure of medial compartment force, a recent study showed that reductions in the external knee adduction moment do not guarantee reductions in medial compartment force [5]. Therefore, direct measurements of changes in medial contact force are important for determining the effectiveness of gait modifications.

Knee adduction moment and medial knee contact force during gait in older people

2014 ◽  
Vol 40 (3) ◽  
pp. 341-345 ◽  
Author(s):  
Shinya Ogaya ◽  
Hisashi Naito ◽  
Akira Iwata ◽  
Yumi Higuchi ◽  
Satoshi Fuchioka ◽  
...  
Keyword(s):  
Older People ◽  
Contact Force ◽  
Knee Adduction Moment ◽  
Medial Knee

scholarly journals Effects of Toe-Out and Toe-In Gaits on Lower-Extremity Kinematics, Dynamics, and Electromyography

2019 ◽  
Vol 9 (23) ◽  
pp. 5245
Author(s):  
Weiling Cui ◽  
Changjiang Wang ◽  
Weiyi Chen ◽  
Yuan Guo ◽  
Yi Jia ◽  
...  
Keyword(s):  
Lower Extremity ◽  
Contact Force ◽  
Repeated Measures ◽  
Joint Pain ◽  
Knee Flexion ◽  
Reaction Force ◽  
Contact Forces ◽  
Knee Adduction Moment ◽  
Positive Effects ◽  
Lateral Contact

Toe-in and toe-out gait modifications have received increasing attention as an effective, conservative treatment for individuals without severe osteoarthritis because of its potential for improving knee adduction moment (KAM) and knee flexion moment (KFM). Although toe-in and toe-out gaits have positive effects on tibiofemoral (TF) joint pain in the short term, negative impacts on other joints of the lower extremity may arise. The main purpose of this study was to quantitatively compare the effects of foot progression angle (FPA) gait modification with normal walking speeds in healthy individuals on lower-extremity joint, ground reaction force (GRF), muscle electromyography, joint moment, and TF contact force. Experimental measurements using the Vicon system and multi-body dynamics musculoskeletal modelling using OpenSim were conducted in this study. Gait analysis of 12 subjects (n = 12) was conducted with natural gait, toe-in gait, and toe-out gait. One-way repeated measures of ANOVA (p < 0.05) with Tukey’s test was used for statistical analysis. Results showed that the toe-in and toe-out gait modifications decreased the max angle of knee flexion by 8.8 and 12.18 degrees respectively (p < 0.05) and the max angle of hip adduction by 1.28 and 0.99 degrees respectively (p < 0.05) compared to the natural gait. Changes of TF contact forces caused by FPA gait modifications were not statistically significant; however, the effect on KAM and KFM were significant (p < 0.05). KAM or combination of KAM and KFM can be used as surrogate measures for TF medial contact force. Toe-in and toe-out gait modifications could relieve knee joint pain probably due to redistribution of TF contact forces on medial and lateral condylar through changing lateral contact centers and shifting bilateral contact locations.

scholarly journals Knee Adduction Moment and Medial Contact Force – Facts about Their Correlation during Gait

PLoS ONE ◽  
2013 ◽  
Vol 8 (12) ◽  
pp. e81036 ◽  
Author(s):  
Ines Kutzner ◽  
Adam Trepczynski ◽  
Markus O. Heller ◽  
Georg Bergmann
Keyword(s):  
Contact Force ◽  
Knee Adduction Moment

Condylar Contact During Normal Walking and Lateral Trunk Sway Gait: an EMG-Driven Modeling Approach to Estimate Articular Loading

2010 ◽  
Author(s):  
Kurt Manal ◽  
Bernardo Innocenti ◽  
Luc Labey ◽  
Thomas S. Buchanan
Keyword(s):  
Contact Force ◽  
Lateral Compartment ◽  
Knee Adduction Moment ◽  
Activation Patterns ◽  
Modeling Approach ◽  
Antagonist Muscles ◽  
Subject Specific ◽  
Trunk Sway ◽  
Hump Pattern ◽  
The Relationship

The knee adduction moment has a characteristic double hump pattern with the first peak generally larger than the second. Recently, Mundermann showed that walking with a lateral trunk sway can reduce the 1st peak moment [1]. One might expect from this finding that there would be a decrease in medial compartment loading. This however may be too simplistic a view. Fregly et al. showed that a decrease in knee adduction moment does not guarantee a decrease in medial contact [2]. Moreover, the relationship between net joint moments and loading is not straightforward, especially when agonist/antagonist muscles are co-activated as occurs in patients with pathology. Computational methods can benefit by accounting for subject specific neuromuscular activation patterns while taking into account subject specific dynamics when predicting articular loading. In this paper we outline our EMG-driven modeling approach to predict articular loading during trunk sway for a patient with a force measuring instrumented knee implant. We hypothesized that walking with a lateral trunk sway would: (a) decrease medial contact force, and (b) increase contact force in the lateral compartment.

Sign in / Sign up

Export Citation Format

Share Document