Six Nations may shift in schedule as concussion puts global season back on agenda

After early resistance to revamping the rugby union calendar both hemispheres are warming to change because of the growing awareness over head injuries• Saracens introduce head impact monitoringThe global season is back on the agenda as rugby authorities look at ways of addressing the physical toll the sport is taking on professional players by arranging the calender so that minimum rest periods are guaranteed. The idea was last floated seven years ago and quickly sank because of entrenched positions but the growing awareness about concussion has prompted renewed efforts to persuade administra…