Leg guards are generally rigid plates, which can disperse the force exerted by the opposite leg and shoes. In addition, the gap between the leg guards and the legs can play a buffer role, and the skin between the leg bones and the leg guards can also play a buffer role to prevent fractures.

Leg guards protect the lower legs, so they are also called shin guards. Due to the high antagonism of football matches, it is very common for players to be kicked to the calf. Physically speaking, shin guards are used to disperse and cushion the pressure and momentum exerted on the lower legs, so as to protect players.