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Plantar fasciitis: are pain and fascial thickness associated with arch shape and loading?

PainSci » bibliography » Wearing et al 2007
Tags: etiology, plantar fasciitis, biomechanics, running, pro, foot, leg, limbs, pain problems, overuse injury, injury, tendinosis, exercise, self-treatment, treatment

Two articles on PainSci cite Wearing 2007: 1. Complete Guide to Plantar Fasciitis2. Plantar Fasciitis Patients Have Thick Soles

PainSci notes on Wearing 2007:

In this tiny study of 10 feet with plantar fasciitis, compared to 10 perfectly fine feet, “thicker fascial structures were associated with lower arched feet but only in individuals with heel pain.”

original abstract Abstracts here may not perfectly match originals, for a variety of technical and practical reasons. Some abstacts are truncated for my purposes here, if they are particularly long-winded and unhelpful. I occasionally add clarifying notes. And I make some minor corrections.

BACKGROUND AND PURPOSE: Although plantar fascial thickening is a sonographic criterion for the diagnosis of plantar fasciitis, the effect of local loading and structural factors on fascial morphology are unknown. The purposes of this study were to compare sonographic measures of fascial thickness and radiographic measures of arch shape and regional loading of the foot during gait in individuals with and without unilateral plantar fasciitis and to investigate potential relationships between these loading and structural factors and the morphology of the plantar fascia in individuals with and without heel pain.

SUBJECTS: The participants were 10 subjects with unilateral plantar fasciitis and 10 matched asymptomatic controls.

METHODS: Heel pain on weight bearing was measured by a visual analog scale. Fascial thickness and static arch angle were determined from bilateral sagittal sonograms and weight-bearing lateral foot roentgenograms. Regional plantar loading was estimated from a pressure plate.

RESULTS: On average, the plantar fascia of the symptomatic limb was thicker than the plantar fascia of the asymptomatic limb (6.1+/-1.4 mm versus 4.2+/-0.5 mm), which, in turn, was thicker than the fascia of the matched control limbs (3.4+/-0.5 mm and 3.5+/-0.6 mm). Pain was correlated with fascial thickness, arch angle, and midfoot loading in the symptomatic foot. Fascial thickness, in turn, was positively correlated with arch angle in symptomatic and asymptomatic feet and with peak regional loading of the midfoot in the symptomatic limb.

DISCUSSION AND CONCLUSION: The findings indicate that fascial thickness and pain in plantar fasciitis are associated with the regional loading and static shape of the arch.

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