Kinetic factors of vertical jumping for heading a ball in flexible flatfooted amateur soccer players with and without insole adoption.

Background: According to literature, little is known regarding the effects of orthotic management of flatfoot on kinetics of vertical jump.

Objectives: To compare the kinetic and temporal events of two-legged vertical jumping take-off from a force plate for heading a ball in normal and flexible flatfoot subjects with and without insole.

Study Design: A functional based interventional controlled study.