Article

Little biomechanical evidence exists to support the association
between excessive foot pronation and anterior knee pain (AKP).
One issue could be
the way excessive pronation has been defined. Recent evidence has suggested that
evaluating pronation in the context of the joint's available range of motion
(ROM, anatomical threshold) provides greater insight on when pronation
contributes to injury. Theoretically, quantifying the amount of time the joint
has to respond before reaching end range (neuromuscular threshold) could provide
additional insight. Therefore the purpose of this study was to use a
neuromuscular threshold, the time to contact (TtC) the ankle joint complex's ROM
boundary, to evaluate runners with and without AKP. METHODS: Nineteen healthy and
seventeen runners with AKP had their ROM and running biomechanics evaluated. The
TtC was calculated using each individual's angular distance from end range
(eversion buffer) and eversion velocity. Data were recorded over ten stance
phases and evaluated using a one way analysis of variance and 95% confidence
intervals. RESULTS: Runners with AKP had significantly shorter TtC the joint's
ROM boundary when compared to healthy runners (64.0 ms vs. 35.6 ms, p=0.01).
While not statistically significant, this shorter TtC was in large part due to
having a smaller eversion buffer, however velocity was found to have a
substantial influence on the TtC of select individuals. These results provide
evidence that a link between pronation and AKP exists when using anatomical and
neuromuscular based thresholds.
CI - Copyright (c) 2013 Elsevier B.V. All rights reserved.

Langue : ANGLAIS