The evidence of damage done to the brains of American football players continues to pile up. So far, not much attention has been focused on the effects of playing on rugby and soccer players. In soccer, it is heading the ball that can cause serious jarring of the brain. In rugby, players are forbidden from certain types of tackles that use or target the head. They are also not as heavily padded and helmeted as in American football and this was thought to discourage dangerous tackles using the head as a battering ram. But they can still be subjected to jarring and bone-crushing tackles as can be seen in this video.