The panel acknowledged that one study had found that found that an association between the use
of soft soccer helmets and a
reduction in concussions and soft tissue
injuries compared with no helmet, without increasing the risk
of injury to areas not covered by the
head gear.
The results
of at least two recent studies, however, suggest that
reductions in full - contact practices can be accompished safely without putting players at additional risk, while researchers continue looking for the
head trauma «holy grail»: a threshold - whether it is number
of hits per week, over the course
of the season,
of a certain force, or to a certain part
of the helmet (e.g. facemask, top
of the
head) above which players are at an unacceptably high risk
of permanent brain
injury.
Dr Rissel added that after helmets were made compulsory, he and his colleague discovered «a continued but declining
reduction in the ratio
of head injuries to arm
injuries [and]... it is likely that factors other than the mandatory helmet legislation reduced
head injuries».