I can see the benefit of bringing a specialist Judo session to the national team. They can probably bring insights unless the players have ever done Judo that they are probably unaware of and incorporate into this game. Yeah it's not going to make a huge amount of difference but it might do something.
Plus I wouldn't call Judo an 'extreme sport' there is very little they'd be doing that was outside of the normal dangers of training to play a rugby match.
Plus I wouldn't call Judo an 'extreme sport' there is very little they'd be doing that was outside of the normal dangers of training to play a rugby match.