Local or global asymmetry in gait of people without impairments

Sadeghi, Heydar

doi:10.1016/s0966-6362(02)00089-9

Cited by 106 publications

(115 citation statements)

References 34 publications

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“…Sadeghi et al stated that preferred limb is more responsible for forward propulsion, whereas non-preferred limb has an important role for support and stability during walking in young people. 44,45 As the preferred foot is the attack foot and non-preferred foot is re-sponsible for postural control and stability in taekwondo athletes, higher absolute impulse value of M2 against to preferred foot and higher absolute impulse value of lateral heel against to non-preferred foot should be considered to avoid injuries. It was also suggested that limb preference might be an important factor in the etiology of some pathology of knee.…”

Section: Discussionmentioning

confidence: 99%

Foot Symmetry and Plantar Pressure Characteristics in Elite Taekwondo Athletes; Preferred and Non-Preferred Foot Comparison

Dağ¹,

Erdoğan²,

Yıldırım³

et al. 2017

Turkiye Klinikleri J Sports Sci

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A AB BS ST TR RA AC CT T O Ob bj je ec ct ti iv ve e: : The aim of this study was to investigate differences in plantar pressure characteristics between preferred and non-preferred foot in elite taekwondo athletes. M Ma at te er ri ia al l a an nd d M Me et th ho od ds s: : The study population consisted of 11 elite taekwondo athletes ages ranged between 19.16±2.72 years. To determine preferred foot, they were also asked which leg they preferred to kick a ball. Plantar pressure distributions were measured by pedobarography device. The relative pressure-loads (%) between preferred and non-preferred foot determined with static pedobarographic measurements while subject stand on the pressure plate. The dynamic pedobarographic measurements were performed to investigate plantar pressure distribution, temporal characteristics and peak pressure asymmetry between preferred and non-preferred foot. R Re es su ul lt ts s: : There was no statistically difference between preferred and non-preferred foot with regard to static measurement results. No significant differences were found between foots for temporal characteristics and peak pressure underneath the ten anatomical areas. The absolute impulse underneath the second metatarsal was significantly higher at preferred foot while absolute impulse of lateral heel was higher at non-preferred foot. The relative impulse of second metatarsal and third metatarsal were also significantly higher at preferred foot. Peak pressure asymmetry was found in favor to non-preferred foot. C Co on nc cl lu us si io on n: : The finding of present study indicates that the peak pressure beneath the preferred and non-preferred foot is not symmetrical. Peak pressure asymmetry finding indicates that preferred and non-preferred foot should be assessed and trained separately to prevent sports injury in taekwondo.K Ke ey yw wo or rd ds s: : Foot symmetry; plantar pressure; symmetry index; taekwondo Ö ÖZ ZE ET T A Am ma aç ç: : Bu çalışmanın amacı elit tekvando sporcularında tercih edilen ve edilmeyen ayaktaki plantar basınç karakteristiklerinin farklılıklarını araştırmaktır. G Ge er re eç ç v ve e Y Yö ön nt te em ml le er r: : Çalışma grubu yaşları 19,16±2,72 yıl olan 11 elit tekvando sporcusundan oluşmaktadır. Tercih edilen ayağın belirlenmesi için bireylere topa hangi ayakla vurdukları soruldu. Plantar basınç dağılımı pedobarografi cihazı ile ölçüldü. Tercih edilen ve edilmeyen ayağa olan basınç yüklenmesi (%) birey platform üzerinde statik olarak ayakta dururken belirlendi. Tercih edilen ve edilmeyen ayaktaki plantar basınç dağılımı, temporal karakteristikler ve pik basınç asimetrisini araştırmak için dinamik pedobarografik ölçümler gerçekleştirildi. B Bu ul lg gu ul la ar r: : Statik ölçüm sonuçlarına göre tercih edilen ve edilmeyen ayaklara olan yük dağılımı istatistiksel olarak farklı değildi. Ayaklar arasında, temporal karakteristikler ve on anatomik bölge altındaki pik basınçlar bakımından anlamlı farklılıklar bulunmadı. Mutlak impals değeri tercih edilen ayakta ikinci metatars altında anlamlı...

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Section: Discussionmentioning

confidence: 99%

Foot Symmetry and Plantar Pressure Characteristics in Elite Taekwondo Athletes; Preferred and Non-Preferred Foot Comparison

Dağ¹,

Erdoğan²,

Yıldırım³

et al. 2017

Turkiye Klinikleri J Sports Sci

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“…Also, the knees and ankles displayed a similar pattern of asymmetry: right limb joints weighted more highly on the first component (thigh), whereas left limb joints weighted more highly on the second (calf) and third (foot) components. This pattern could possibly provide an example of the interrelationships between local asymmetries that exist in normal gait to produce globally symmetric behavior in the lower-limbs (see Sadeghi, 2003).…”

Section: Components In Non-braced Walkingmentioning

confidence: 99%

“…Therefore, gait analysts applying PCA often (a) perform several different PCAs (as previously described) or (b) reorganize three-mode data into some two-mode form to apply one PCA (e.g., Hubley-Kozey et al, 2008;Sadeghi, 2003;Shemmell et al, 2007). The first approach produces many solutions that are relevant only to particular joints/muscles/segments (or subjects), lacking a solution that describes the data as a whole.…”

Section: Introductionmentioning

confidence: 99%

Parallel Factor Analysis of gait waveform data: A multimode extension of Principal Component Analysis

Helwig

Hong

Polk

2012

Human Movement Science

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Gait data are typically collected in multivariate form, so some multivariate analysis is often used to understand interrelationships between observed data. Principal Component Analysis (PCA), a data reduction technique for correlated multivariate data, has been widely applied by gait analysts to investigate patterns of association in gait waveform data (e.g., interrelationships between joint angle waveforms from different subjects and/or joints). Despite its widespread use in gait analysis, PCA is for two-mode data, whereas gait data are often collected in higher-mode form. In this paper, we present the benefits of analyzing gait data via Parallel Factor Analysis (Parafac), which is a component analysis model designed for three-or higher-mode data. Using three-mode joint angle waveform data (subjects × time × joints), we demonstrate Parafac's ability to (a) determine interpretable components revealing the primary interrelationships between lowerlimb joints in healthy gait and (b) identify interpretable components revealing the fundamental differences between normal and perturbed subjects' gait patterns across multiple joints. Our results offer evidence of the complex interconnections that exist between lower-limb joints and limb segments in both normal and abnormal gaits, confirming the need for the simultaneous analysis of multi-joint gait waveform data (especially when studying perturbed gait patterns).ii To my loving and supportive family.iii

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“…Williams et al [34] have also demonstrated that asymmetries in GRF can distinguish veterinary (equine) gait pathologies. Sadeghi et al [31][32][33]36] have used these techniques to evaluate unilateral and asymmetric patterns of muscle powers at the hip and knee in several subject populations, and they have proved useful for distinguishing asymmetries in muscular control of the hips during level walking in healthy subjects [31], as well as for discriminating the muscle powers used by older and younger subjects [32]. Only one study used PCA to integrate different kinds of data [30].…”

Section: Multivariate Analyses Of Human and Animal Gait And Motionmentioning

confidence: 99%

“…However, these methods have been applied to only a small number of studies of gait in humans or animals [30][31][32][33][34][35], and in all of these investigations, principal components analysis (PCA) has been the only multivariate technique that was applied. This dimensional reduction technique uses mathematical procedures to combine correlated variables into a smaller number of uncorrelated components, while maximally retaining the data variance.…”

Section: Multivariate Analyses Of Human and Animal Gait And Motionmentioning

confidence: 99%

A Review of New Analytic Techniques for Quantifying Symmetry in Locomotion

et al. 2010

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Abstract:We present a review of novel techniques developed by our research group to improve quantitative assessment of human movement, especially assessments related to symmetric and asymmetric gait patterns. These new methods use motion capture data of the lower limb joints (e.g., joint and body segment angular position and/or velocity, or joint center locations) and include: (1) Regions of Deviation (ROD) analysis, (2) complexity and variability of phase portraits, and (3) multivariate shape-alignment and decomposition. We provide example demonstrations of these techniques using data from infants, typical and atypically developing children, simulated injuries of a knee or ankle, and wheelchair propulsion.

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Local or global asymmetry in gait of people without impairments

Cited by 106 publications

References 34 publications

Foot Symmetry and Plantar Pressure Characteristics in Elite Taekwondo Athletes; Preferred and Non-Preferred Foot Comparison

Foot Symmetry and Plantar Pressure Characteristics in Elite Taekwondo Athletes; Preferred and Non-Preferred Foot Comparison

Parallel Factor Analysis of gait waveform data: A multimode extension of Principal Component Analysis

A Review of New Analytic Techniques for Quantifying Symmetry in Locomotion

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