Analysis of the use of insoles in the dynamic stability of the lower limbs in recreational runners: An exploratory study.

BACKGROUND: The use of insoles, which is increasingly widespread, can promote changes in biomechanics during running.

RESEARCH QUESTION: Can the use of insoles with various patterns of infracapital support influence factors related to the dynamic stability of the lower limbs during running on a treadmill in recreational runners?

METHODS: This is controlled single-blind repeated measures. Static baropodometric data were collected, as well as kinematic data for the lower limbs and electromyographic data for the gluteus maximus and gluteus medius muscles, for twelve recreational runners on a treadmill using four models of insoles (neutral and with forefoot elements - infracapital bar).

RESULTS: Neutral insoles were able to reduce laterolateral displacement, increase the displacement of the mass to the posterior, and increase the lateral rotation of the left knee and medial rotation of the right hip. Insoles with a 2 mm total infracapital bar were able to move the mass to the posterior, increase laterolateral displacement and activate the gluteus medius. Insoles with a 2 mm medial infracapital bar were able to increase the displacement of the mass to the posterior, increase the adduction of left hip and the medial rotation of right hip, and activate the gluteus medius. Insoles with a 4 mm medial infracapital element were able to move the body mass to the posterior and to the left, increase laterolateral displacement, increase the adduction of left hip, the medial rotation of right hip and the abduction of right knee.

SIGNIFICANCE: The insoles evaluated in the present study were able to modify biomechanical variables of recreational runners related to dynamic stability during running on a treadmill and static baropodometric variables.