Hi. We who do not practice these sports, do not assume in most cases how complicated this situation can be. So in rugby, football or mixed martial arts. But there is also a trade part that sells you this way of playing and on the other hand that many players are born for that. So it is a bit complicated, both in giving greater protection or resting the players for long periods. The new technologies could conceive some type of material that would protect without reducing agility to them. Very interesting your post.