Leg guards generally refer to shin guards used in football. Also used in ice hockey, hockey and other sports leg guards. Tibia or fibula fractures can occur when the leg guard is not worn or when the leg is violently acted on. In severe cases, thigh and femur fractures or knee cruciate ligament tears can occur. Leg guards can reduce the incidence of leg fractures. When the tibia is fractured, the lower limb cannot bear the weight of the body, so it is easy to break.