Greater calc-cuboid excursion in those with plantar fasciitis

NewsBot · Sep 24, 2012

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THE EFFECTS OF PLANTAR FASCIITIS ON MULIT-SEGMENT FOOT RUNNING
GAIT KINEMATICS
Robin L. Bauer
University of Wisconsin-Milwaukee, 2012 Master Thesis

Plantar fasciitis is a common lower extremity injury caused by mechanical
overload that affects 10% of all runners. Despite its commonality, research results
investigating the etiology of the condition and the most efficacious treatment have been
equivocal. A potential limitation of previous research assessing the mechanical changes
associated with plantar fasciitis may be the modeling of the foot as a single segment. To
date no study has investigated running kinematics in individuals with plantar fasciitis
using a multi-segment foot model. Sonography has also reported plantar fascia thickening
and degeneration associated with plantar fasciitis in non-athletic populations; however it
has not been used to investigate the plantar fascia in runners with plantar fasciitis.
Therefore, the primary purpose of this study was to compare running kinematics between
runners with plantar fasciitis and uninjured runners using a six foot segment model. The
secondary purpose was to investigate differences in plantar fascia thickness between the
iii
two groups. Fifteen runners with plantar fasciitis (age: 30 ± 8.74 yrs, mass: 67.98 ± 8.20
kg) and 15 age, gender and mileage matched uninjured runners (age: 29.33 ± 6.53 yrs,
height: 170.52 ± 7.78 cm, mass: 68.07 ± 9.99 kg) were recruited. Data collection included
foot structure assessment, ultrasound imaging, and running gait analysis. Stance phase
was separated into 4 subphases, and MANOVAs (α ≤ 0.05) were performed to assess
between-subject ROM differences for the functional articulations (rearfoot complex,
calcaneocuboid, and calcaneonavicular complex, medial and lateral forefoot, and 1st
metatarsophalangeal complex). Independent t-tests (α ≤ 0.05) were conducted to
investigate differences in plantar fascia thickness.
Results revealed calcaneocuboid eversion ROM during phase 1 (p = 0.003) and
plantar fascia thickness (p = 0.004) were significantly greater in the plantar fasciitis
group. The increased eversion excursion of the calcaneocuboid in the plantar fasciitis
group may suggest decreased lateral midfoot stability. Although the results of this study
advance the understanding of the effect of plantar fasciitis on running gait, additional
study of the influence of extrinsic and intrinsic foot musculature and foot strike pattern
are warranted before conclusions regarding the effect of plantar fasciitis on running gait
can be drawn.
Click to expand...

Admin2 · Sep 25, 2012

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CraigT · Sep 25, 2012

Interesting title... the effect of plantar fasciitis on the the motion at Calc-cuboid rather than saying the plantar fasciitis is caused by the increased motion of the calc cuboid... not the usual mistake of confusing correlation with causation, but have they done it anyway???

Kevin Kirby · Sep 25, 2012

Skin markers on the cuboid? Doubt that was a very accurate representation of cuboid motion. Also, the subjects with plantar fasciitis might have been running differently due to the pain from their plantar fasciitis.

However, nice try for a master's paper.

CraigT · Sep 25, 2012

Skin markers on the cuboid? Doubt that was a very accurate representation of cuboid motion.
Click to expand...

At least we have gone beyond modelling the foot as a single rigid segment...:bang:

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