Características da pronação do pé medidas através de parâmetros clínicos e biomecânicos / Characteristics of hiperpronation in feet measured through clinic and biomechanics parameters

AUTOR(ES)
DATA DE PUBLICAÇÃO

2005

RESUMO

The human foot has a double function, a static and a dynamic one. These increase the risk of injury establishment on the lower limb during activities that are related to repetitive loading. The purpose of this study is to embase the clinical evaluation of hyperpronators. Due to theorical studies, clinical observation and scientific research a more optimized treatment can be applied as well as differents evaluatiuon possibilities can be justified. The assessment was divided into three parts, a questionnaire, the clinical and the biomechanical evaluations. During the clinical evaluation specific tests for pronation control and to look at ROM were performed. The biomechanical evaluation was performed first looking at anthropometry using a 3D Foot Scanner and second looking at plantar pressure distribution in both static and dynamic conditions. The sample was composed by 17 subjects who volunteered to participate in this study with mean value of BMI of 23,91 kg/m2 ( 2,97). To be classified as a hyperpronator the subjects navicular drop needed to be above in 4mm controlled with and without body weight load, the calcaneus alignment in orthostatic position was supposed to be higher than 2 in valgus position. Looking at the results it is no note that the calcaneus alignment, height and fall of the navicular, angle of the halux, dorsal and plantar flexions showed no correlation in between. The only exeption was the correlation between the dorsal flexion and the navicular height for the group PF with r=-0,371 e r=-0,669 for the dominant and non-dominant limbs respectively. For the group HP navicular fall and tibiocalcaneal alignment showed an r=0,374 and r=0,575. These demonstrate different anthropometric relationships for the two groups the HP and the PF. Comparing the biomechanical data according to the clinical division due to calcaneus eversion and navicular height, there was a high statistics significant difference for the plantar pressure distribution in several anatomical regions. The most significant differences were found in the running condition. For the walking condition the variables with statistics significant differences were the contact area and relative load at the medial midfoot and the maximum pressure value at the second metatarsus area. The correlation data between halux angle and contact area at the medial midfoot region presented a high statistics significant correlation. It is therefore clear that the control of the barefoot condition for the exclusion of intrisic and extrinsic factors is extremelly important. The extrinsic factors have an extensive literature exploration. Finally the chracteristics of hyperpronators using clinical parameters as calcaneus eversion and navicular fall demonstrates to be efective.

ASSUNTO(S)

educacao fisica clinical evaluation hyperpronation avaliação clínica biomechanics biomecânica hiperpronação

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