Relationships between static foot alignment and dynamic plantar loads in runners with acute and chronic stages of plantar fasciitis: a cross-sectional study

Autor(es)

Ribeiro, Ana P. ^{[1, 2]} ; Sacco, Isabel C. N. ^[1] ; Dinato, Roberto C. ^[1] ; Joao, Silvia M. A. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Fac Med, Dept Fisioterapia Fonoaudiol & Terapia Ocupac, Sao Paulo, SP - Brazil

^[2] Univ Santo Amaro Unisa, Fac Med, Dept Fisioterapia, Posgrad Ciencias Saude, Sao Paulo, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: BRAZILIAN JOURNAL OF PHYSICAL THERAPY; v. 20, n. 1, p. 87-95, JAN-FEB 2016.
• Citações Web of Science: 3

Resumo

BACKGROUND: The risk factors for the development of plantar fasciitis (PF) have been associated with the medial longitudinal arch (MLA), rearfoot alignment and calcaneal overload. However, the relationships between the biomechanical variables have yet to be determined. OBJECTIVE: The goal of this study was to investigate the relationships between the MLA, rearfoot alignment, and dynamic plantar loads in runners with unilateral PF in acute and chronic phases. METHOD: Cross-sectional study which thirty-five runners with unilateral PF were evaluated: 20 in the acute phase (with pain) and 15 with previous chronic PF (without pain). The MLA index and rearfoot alignment were calculated using digital images. The contact area, maximum force, peak pressure, and force-time integral over three plantar areas were acquired with Pedar X insoles while running at 12 km/h, and the loading rates were calculated from the vertical forces. RESULTS: The multiple regression analyses indicated that both the force-time integral (R2=0.15 for acute phase PF; R2=0.17 for chronic PF) and maximum force (R2=0.35 for chronic PF) over the forefoot were predicted by an elevated MLA index. The rearfoot valgus alignment predicted the maximum force over the rearfoot in both PF groups: acute (R2=0.18) and chronic (R2=0.45). The rearfoot valgus alignment also predicted higher loading rates in the PF groups: acute (R2=0.19) and chronic (R2=0.40). CONCLUSION: The MLA index and the rearfoot alignment were good predictors of plantar loads over the forefoot and rearfoot areas in runners with PF. However, rearfoot valgus was demonstrated to be an important clinical measure, since it was able to predict the maximum force and both loading rates over the rearfoot. (AU)

• Processo FAPESP: 10/14044-1 - Influência da construção do calçado esportivo na Biomecânica de membros inferiores durante a corrida.
• Beneficiário: Roberto Casanova Dinato
• Modalidade de apoio: Bolsas no Brasil - Mestrado
• Processo FAPESP: 15/20042-5 - Dynamic Patterns of Forces and Loading Rate in Runners with Unilateral Plantar Fasciitis: A Cross-Sectional Study
• Beneficiário: Ana Paula Ribeiro
• Modalidade de apoio: Auxílio à Pesquisa - Publicações científicas - Artigo
• Processo FAPESP: 11/03069-6 - Efeito crônico da utilização de um calçado flexível e sem salto sobre os aspectos clínicos e cinéticos da marcha de idosas com osteoartrite de joelho
• Beneficiário: Mariane Yokota
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica