Therefore , the use of helmet protects the athlete from concussion in many different ways , when using it properly ( Biasca et al. 2002 ) .
( Naunheim et al. 2003 . )
The use of helmet protects the athlete from concussion in many different ways , when using it properly ( Biasca et al. 2002 ) .
( Naunheim et al. 2003 . )