Is there relationship between hip muscular strength, hip and ankle stiffness and magnitude of calcaneal eversion during running?

• Grant number: 15/26825-1
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: March 01, 2016
• End date: November 30, 2016
• Field of knowledge: Health Sciences - Physiotherapy and Occupational Therapy
• Principal Investigator: Fábio Viadanna Serrão
• Grantee: Ila de Martin Velludo
• Host Institution: Centro de Ciências Biológicas e da Saúde (CCBS). Universidade Federal de São Carlos (UFSCAR). São Carlos , SP, Brazil

Abstract

Excessive pronation subtalar (commonly measured by rearfoot eversion) has been considered a risk factor for a variety of musculoskeletal injuries of the lower limb the running. Thus, there is great interest from health professionals in identifying clinically measurable variables, and which are potentially modifiable, which may influence the magnitude of eversion of the rearfoot. Potential factors involved with increased rearfoot eversion during gait support phase are muscle strength and passive stiffness of the hip and passive ankle stiffness. However, there are no studies that have evaluated whether these factors are related to the rearfoot eversion during the stance phase of the running. The objective of the study is to assess whether there is a relationship between the strength of the hip muscles, hip stiffness and ankle stiffness with magnitude of rearfoot eversion during the stance phase of running on a treadmill. Participate 23 healthy runners of both sexes aged 18-35 years, of which will be assessed: the isometric force extension and lateral rotation of the hip, using a manual dynamometer Lafayette Manual Muscle Test System (Lafayette Instruments, Lafayette, IN , USA), hip and ankle stiffness using first detectable resistance analysis (FDR) and the peak of the rearfoot eversion using Qualisys Motion Capture System software (Qualisys Medical AB, Sweden). Depending on the distribution of data, will be used the coefficient of Pearson or Spearman correlation to evaluate the association between the dependent variables (peak rearfoot eversion) and independent (extension and lateral rotation force of the hip, hip and ankle stiffness) (alpha = 0.05). (AU)