Mark Ella (57)
What some of the research shows is that headgear wearers are more likley to approach collisions at a higher speed more often, using their heads and so they expose themselves to higher energy collisions more often.Would like to a bit more about that.
Could it be that research comes from American football??
I could imagine a hard helmet transferring force to the neck but hard to see how soft headgear could do that.
Sent from my MHA-L09 using Tapatalk
World Rugby actually limit the thickness and density of headgear to the point where it can't absorb sufficient energy to prevent concussion to discouragae use of the head in this way.
I understand the reason they do this is not for forces which the headgear absorbs, but for when the headgear reaches it's maximum effectiveness - it's completely deflected and all of the force is being transmitted through to the wearer - which happens more than you'd expect out on the field.
According to the IRB (unpublished data, June 2003), the reason for the lower limit (200g) is because headgear that perform under this threshold could cause players to use their heads more, risking cervical spine injury.