Are there changes in the foot biomechanics during the before and after fifth metatarsal fracture running stance phase?

The purpose of this study is to restore the before fracture kinematic state by using the observed foot bone displacements as boundary conditions for finite element (FE) analysis. Secondly, this study aims to compare the biomechanical changes of the foot before and after a metatarsal (MT) fracture using this method. A total of 21 subjects had previously experienced a shaft stress fracture of the MT5 in the six months before the collection of experimental data. All patients received treatment through the use of cast immobilization for duration of 4-6 weeks. After the subject's recovery, we obtained gait biomechanical data. At the same time, we also obtained gait data from 21 healthy subjects as the control group. This study found that when a fracture of the MT5 occurs, even after rehabilitation, there is a significant impact on the metatarsal.