Usually by a blow to the abdomen. Think a football being blasted into you, but sometimes it can happen when you fall to the ground heavily. The impact causes the pressure to change in the diaphragm, ...
7 September: Wales v Belgium (2014 World Cup qualifer, venue and kick-off tbc) 11 September: Serbia v Wales (2014 World Cup qualifier, venue and kick-off tbc) 12 October: Wales v Scotland (2014 World ...