Abstract
Several studies have investigated the relationship between heel pronation with plantar pressure during gait. With a degree of variability and inluence of the footwear, usually excessive pronation is associated with higher mechanical loads. However, larger loads are commonly associated with pronation. his study aims to compare the plantar pressure distribution among individuals with diferent pronation angles of the subtalar joint angle during gait with controlled speed. he maximum angle of the subtalar joint was determined by capturing images in the frontal plane and the pressure plant peaks were acquired by EMED pressure platform. he pronated group showed pressure plant peaks signiicantly higher in the lateral heel area (18%; p=0.031), medial heel (17%, p=0.034), lateral midfoot (30%; p=0.032) and medial midfoot (41%; p=0.018) when compared to the control group. Excessive pronation of the subtalar joint caused changes in plantar pressure distribution, and an increase in pressure plant peaks, especially in the heel and midfoot regions. his demonstrates the need for a speciic care of this population, mainly because the increased pressure plant peaks is related to pain in the feet and onset of injuries.
Highlights
INTRODUCTIONHe pronation movement of the subtalar joint is necessary because it assists in the attenuation of impact forces during the phase of body weight support during gait[1], and results from the combination of eversion, dorsilexion and abduction of the subtalar and mediotarsal joint[2]
Several studies have investigated the relationship between heel pronation with plantar pressure during gait
Excessive pronation of the subtalar joint afects the alignment of foot, ankle, leg, pelvis and lumbar region, causing changes in kinetic[7] and kinematic[8] biomechanical parameters during the gait support phase
Summary
He pronation movement of the subtalar joint is necessary because it assists in the attenuation of impact forces during the phase of body weight support during gait[1], and results from the combination of eversion, dorsilexion and abduction of the subtalar and mediotarsal joint[2]. Excessive pronation of the subtalar joint afects the alignment of foot, ankle, leg, pelvis and lumbar region, causing changes in kinetic[7] and kinematic[8] biomechanical parameters during the gait support phase. Because it is a movement performed in a closed kinetic chain, it changes joint torques, reduces rigidity and alters stresses imposed on the structures of the lower limbs and lumbar-pelvic complex[9]. Subtalar pronation is related as a parameter of structural overload[9], it is not the only biomechanical variable afected, since plantar pressure undergoes direct changes as a consequence of excessive movements of this joint[11]. Our hypothesis is that individuals with excessive subtalar pronation (greater than 8o)[3,4] will have higher plantar pressure peaks. herefore, the aim of this study was to compare the plantar pressure distribution among individuals with diferent pronation angle behavior of the subtalar joint during gait
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