Relación entre la postura del pie y la cinemática de la carrera: estudio piloto

Introduction

The study of running kinematics provides useful information for optimising performance and to prevent injuries. Some relationship has been found between running kinematics and foot type, but this remains unclear. One method for the static classification of the foot is the foot posture index, which stands out by its simplicity.

Objectives

The main objective of this study is to analyse the relationship between the foot posture index and various kinematic temporal parameters during running. Secondary objectives are to assess whether km/week and body mass index influence these parameters.

Methods

A pilot study was performed by analysing 25 subjects (15 men and 10 women) (age 28 ± 9.1 years; 67 ± 13.3 kg weight, height 1.69 ± 0.08 m; BMI 23.2 ± 3.2 kg/m²). An analysis was made of the foot posture index, kilometres per week, body mass index and temporal kinematics parameters during running were assessed (contact time, flight time, stride time and stride frequency). All measurements were performed on a treadmill at a speed of 2.43 m/s. The recordings were made using a camera at a frequency of 480 Hz. The kinematic variables were analysed with the software, KINOVEA®.

Results

Of the variables analysed, only flight time (t = 2.689; p = .013) and stride frequency (t = -2.249; p = .034) showed significant differences related to km per week. Out of the other variables analysed, no significant differences were found (p <0.05).

Conclusions

For the studied sample, the foot posture index is not significantly associated with the kinematic parameters analysed. The results of this study suggest that out of the different variables analysed, only the flight time and stride frequency seem to be significantly influenced by the weekly training volume.