Effect of strength training of ankle plantarfexors on selective voluntary motor control, gait parameters, and gross motor function of children with cerebral palsy

Abstract

[Purpose] The purpose of this study was to investigate the effect of ankle plantarfexor strength training on selective voluntary motor control, gait parameters, and gross motor function of children with cerebral palsy (CP), focusing on changes in the strength and muscle activity of the ankle plantarfexors. [Methods] Six children aged between 4 and 10 years with CP participated in a 6 week strengthening program. The subjects were evaluated before and after the intervention in terms of ankle plantarfexor strength, muscle activity, gait velocity, cadence, step length, and D (standing) and E (walking, running, and jumping) dimensions of the Gross Motor Function Measure (GMFM). The data were analyzed using the non-parametric Wilcoxon signed-rank test. [Results] The strength of the plantarfexors increased in the majority of subjects. Signifcant and clinically meaningful post-intervention improvements in subject's gait velocity, cadence, and step length were found. [Conclusion] The controlled ankle plantarfexor strengthening program may lead to improvements in strength and spatiotemporal gait parameters of children with CP.