Static evaluation of the anklefoot complex and dynamic patterns of the plantar pressure distribution in runners with and without plantar fasciitis / Avaliação estática do complexo tornozelo-pé e padrões dinâmicos da distribuição da pressão plantar de corredores com e sem fasciite plantar

AUTOR(ES)
DATA DE PUBLICAÇÃO

2010

RESUMO

The plantar fasciitis has been the third most common disease in runners. Despite this high prevalence, its pathogenesis is still inconclusive. In literature, the rearfoot misalignment, changes in the conformation of longitudinal plantar arch and increased mechanical load on the feet, have been described as risk factors for developing of plantar fasciitis. However, there are few studies investigating these factors during the running. The most of the literature investigated the gait and the results are still controversial and unclear, mainly on the effect of pain associated with disease. For pain relief, most of the treatments are based on use of the insoles, however, they do not have long-term beneficial effects. This can be explained by the lack of scientific evidence that describe the characteristics of postural ankle-foot complex and dynamic load patterns on plantar surface during the running, thus, improve effectiveness this type of treatment. The general purpose of this study was to investigate the influence of plantar fasciitis with and without pain on the rearfoot alignment, longitudinal medial plantar arch in bipedal standing posture and on the plantar pressure distribution during the running. One hundred and five adult recreational runners of both sexes between 20 to 55 years old were studied. Of these, 45 had plantar fasciitis (symptomatic 30 SPF and asymptomatic 15 APF) and 60 controls runners CG. Two experiments were realized in order to respond the specific scientific questions. The first experiment had the specific purpose of verify the influence of plantar fasciitis symptomatic (with pain) and asymptomatic (without pain) on the rearfoot alignment and on the longitudinal medial plantar arch during bipedal standing posture of runners. Therefore, were evaluated by mean of digital photogrammetry, two clinical measures: the rearfoot angle and arch index. The experiment two aimed specifically to investigate and comparing the plantar pressure distribution in runners with plantar fasciitis symptomatic and asymptomatic and runners without plantar fasciitis during the running. Therefore, the plantar pressure distribution was measured by capacitive insoles (Pedar System X) during a running of 40 m at a speed of 12km/h, using a standard sport shoes. Pain was measured by visual analogue scale. For analysis of the pressure variables, the foot was divided into six areas: rearfoot lateral, central and medial; midfoot and forefoot medial and lateral. The principal results of this study showed that the symptomatic and asymptomatic plantar fasciitis do not show significant difference in the valgus rearfoot misalignment, but the condition of plantar fasciitis (symptomatic and asymptomatic) caused an increase of the longitudinal medial plantar arch compared to CG. In relation to the plantar loads during the running, there was no significant difference on pressure peak (p = 0.609), contact area (p = 0.383), contact time (p = 0.908) and pressure integral (p = 0.504). We concluded that the symptomatic and asymptomatic plantar fasciitis does not change the valgus rearfoot alignment during bipedal standing posture and the plantar pressure distribution during the running. However, the condition of symptomatic and asymptomatic plantar fasciitis showed an increase in the longitudinal medial plantar arch of recreational runners

ASSUNTO(S)

mechanical stress foot estresse mecânico running tornozelo ankle pé fasciite plantar corrida plantar fasciitis

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