Article

The purpose of this study was first to investigate whether foot pronation
(measured as calcaneal eversion) induced an anterior tilt of the pelvis and
increased the degree of lumbar lordosis. Second the study investigated whether
foot supination (measured as calcaneal inversion) induced a posterior pelvic tilt
and a decreased lumbar lordosis. Participants placed their feet in 18 different
foot positions while standing on a rigid platform. Seven of these positions
ranged from 15 degrees of foot eversion to 15 degrees of foot inversion and 11
positions ranged from 40 degrees of external foot rotation to 40 degrees of
internal foot rotation. Pelvic tilt and lumbar lordosis were estimated using a 3D
motion analysis system. Foot pronation and supination did not have a significant
relationship with pelvic tilt (r=0.3) and lumbar lordosis (r=0.05). Internally
rotating the legs caused the pelvis to tilt anteriorly and externally rotating
the legs caused the pelvis to tilt posteriorly (r=0.58). There was no
relationship between leg rotation and lumbar lordosis (r=0.24). Since the effects
of pelvic tilt on the lumbar spine were only noticeable when pelvic tilt was
exaggerated beyond values seen this study it seems unlikely that there is a link
between induced foot pronation and an increase in lumbar lordosis.
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Langue : ANGLAIS