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A biomechanical assessment of running with hallux unstable shoes of different material stiffness

Mei Qichang, Gu Yaodong, Fernandes Justin

Acta of Bioengineering and Biomechanics

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2019

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Vol. 21, no. 1

121--128

EN

Functional footwear with different unstable profiles has been widely used to mimic barefoot condition and offload plantar loading for pathological or injury prevention. However, little research investigates the effect of unstable structure on particular foot functions. In this study, a prototype of unstable shoe design with unstable element of different stiffness placed at the hallux (a regionalized rocker) was used. The primary objective was to analyse the biomechanical performance of running with hallux unstable shoes, aiming to potentially stimulate and increase the toe gripping function. Methods: The lower limb kinematics and plantar pressure distribution were measured to comparatively analyse the soft (SS) and hard (SH) unstable shoes with flat control shoes (CS). Results: The SS showed increased big toe and reduced forefoot plantar pressure. The SS led to similar lower limb kinematics to baseline CS except for reduced hip abduction, increased rotation range of motion (ROM), increased peak ankle plantar flexion and ROM. The SH presented significantly altered lower limb kinematics across hip, knee and ankle, and laterally distributed plantar pressure. Conclusions: Unstable shoes with soft material led to reduced medial metatarsal loading by increasing the support area and modified joint kinematics minimally. Unstable shoes with stiffer material presented compensatory kinematic movements across all joints and laterally shifted plantar loading distribution. These findings may provide implications on toe grip function training for foot pressure off-loading.

2

Aspekt obuwia minimalistycznego w kontekście zmian parametrów mechaniki chodu

Serweta W., Olejniczak Z.

Technologia i Jakość Wyrobów

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2015

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R. 60

76--82

PL

W pracy przedstawiono wstępne zagadnienia, dotyczące użytkowania obuwia minimalistycznego. Na podstawie ogólnodostępnych wyników badań naukowych, zobrazowano wpływ używania tego typu obuwia na wybrane parametry mechaniki chodu.

EN

In this paper some preliminary problems in the field of minimalistic footwear were evolved. On the base of available research results, the influence of minimalistic trend on mechanic's variables of the foot - ground interaction was illustrated.

3

Analiza biomechaniczna chodu prawidłowego

Głowiński S.

TTS Technika Transportu Szynowego

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2013

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R. 20, nr 10

847--853, CD

PL

Artykuł wprowadza w problematykę badania chodu prawidłowego. Opracowano model kończyn dolnych o 14 stopniach swobody (po 7 stopni na każdą kończynę) z zaimplementowanymi parametrami antropometrycznymi. Przeprowadzono symulację chodu i przedstawiono analizę wielkości kinematycznych takich jak przebiegi czasowe kątów w poszczególnych stawach. Określono wielkości dynamiczne takie jak siły występujące w wybranych mięśniach poszczególnych stawów oraz zmianę długości mięśni w funkcji zmiany kąta podczas chodu prawidłowego.

EN

In this paper the results of the research based on simulation of human gait were presented. The model of the lower limbs of 14 degrees of freedom was described. The simulation of gait was done and selected biomechanical parameters with description were presented. The dynamic forces in selected muscles at each joint and the muscle length changes as a function of an angle were specified.

4

The influence of knee marker placement error on evaluation of gait kinematic parameters

Szczerbik E., Kalinowska M.

Acta of Bioengineering and Biomechanics

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2011

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Vol. 13, no. 3

43-46

EN

Vicon motion system is an accurate equipment for objective gait analysis. According to clinical experience the most important source of errors in kinematics is marker misplacement. It seems that knee marker placement is especially important because of its direct influence on two body segments: thigh and shank. There is little data in the literature on how the misplacement of knee marker determines the changes of kinematic parameters. Therefore the aim of this study was to collect the kinematic data of subjects with different knee pathologies (one with knee flexion contracture, the second with knee hyperextension) while knee marker position was changed in a systematical way. They were walking with their natural, preferred speed. The data were collected using VICON460 motion system, the Helen Hayes marker set and Plug-In-Gait model. Then they were processed based on Polygon software. The results of both subjects showed the changes of kinematics, depending on the knee marker misplacement. The assessed joint ranges of angle change were: in knee, 18° in sagittal plane and 20° in frontal plane; in hip, 10° in sagittal plane and 24° in transversal plane; in ankle, 10° in sagittal plane and 25° in transversal plane. This paper presents the detailed data which could help the users of such systems to interpret the kinematic data.

5

Evaluation of the kinematic parameters of normal-paced gait in subjects with gonarthrosis and the influence of gonarthrosis on the function of the ankle joint and hip joint

Ogrodzka K., Niedźwiedzki T., Chwała W.

Acta of Bioengineering and Biomechanics

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2011

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Vol. 13, no. 3

47-54

EN

The aim of the study was to assess the variability of parameters characterising the gait of persons suffering from degenerative changes of the knee joint and their influence on the ankle and hip joints. The values of the angular changes in the knee, ankle and hip joints in the three planes of motion were assessed. Locomotion tests were performed on 27 persons, aged between 60 and 74, using Vicon 250, the three-dimensional analysis system. The sharpest deviations from the results of the control group were revealed in the transverse and frontal planes. Degenerative knee joint disease has changed the gait stereotype causing a reduction in the economy of gonarthrosis patients’ locomotion, the influence of the disease on the function of the neighbouring joints is also distinctly marked.