Skip to main content  Would youth football survive a tackling
ban?  By Stephanie Smith, CNN updated 8:45 AM EDT, Fri September
28, 2012 Players compete during the Pop Warner Pee Wee Football
Super Bowl in Orlando, Florida.   • Concussion expert says kids
shouldn't be tackling, body checking until 14   • Before 14,
expert says, "bobble head" effect snaps back the brain   •
Myelin acts as insulation for nerve fibers in the brain after
the age of 14   • Opponents says the age is arbitrary and that
science hasn't backed up conclusions  (CNN) -- Fourteen can be a
time of total transformation. It is an age when gangly
adolescent limbs may morph into lithe, stronger ones. It is when
the first signs of adulthood -- breasts, hair (on faces and
other places) -- start cropping up.  Fourteen is also the
soonest any child should be tackling on a football field,
heading a soccer ball, or body checking an opponent on an ice
hockey rink, according to a leading concussion expert.  "If kids
don't have axillary (underarm) or pu