How much damage is done to the legs if you don't wear shin guards during a football match?

The shin guards are what protect the lower leg (with the development of technology, some shin guards can now also protect the ankle) and are therefore also known as shin guards. Due to the highly competitive nature of football, it is not uncommon for players to be kicked in the calf.

Physically speaking, shin guards protect the player by distributing and cushioning the pressure and impulse applied to the calf. They are generally rigid plates that disperse the force exerted by the opponent's leg and shoe. In addition, the gap between the shin plate and the leg provides a cushioning effect and the flesh between the leg bone and the shin plate also provides a cushioning effect to prevent fractures.　　

So what are the dangers of not wearing shin guards?

Fractures of the tibia or fibula can occur when players do not wear shin guards and when violence is applied to the lower leg, and can be severe enough to cause a femur fracture in the thigh or a cruciate ligament tear in the knee. Leg braces can reduce the incidence of lower leg fractures. In a tibial fracture, the lower limb cannot support the weight of the body and therefore breaks easily. Fractures of the fibula, on the other hand, are relatively difficult to diagnose because the fibula is a non-weight-bearing bone and the athlete can continue to play even if a fracture occurs. As the fibula is a non-weight-bearing bone, it is subject to less stress and therefore takes longer to heal.

FIFA makes it compulsory for players to wear a leg brace when playing (see Chapter 4 of the football rules: football players must wear a leg brace made of plastic, rubber or similar material sufficient to provide some protection and which must be completely covered by a football sock) to prevent fractures of the lower leg from occurring. The treatment of a fractured fibula in football players is not very different from that of other sports, but because of the high demands placed on the calf muscles themselves, it takes a relatively long time to recover fully enough to play football again.