A preliminary study commissioned by the National Football League reveals that former players have an increased risk of memory-related diseases, like Alzheimer's.

Some Connecticut parents say the study has made them reconsider allowing their children to play contact sports. The study found that former NFL players ages 30 to 49 are 19 times more likely to have memory problems than the average population.

New Canaan football coach Lou Marinelli says high school football is safe for teens. Dr. Mark Camel, a neurosurgeon in Connecticut, says parents can let their kids play sports, but should take caution if they experience concussions.