08/26/2026
A recent study, released on Tuesday, estimates that 25% of players in the NFL will develop chronic traumatic encephalopathy or CTE. As CTE can only be definitively diagnosed after death, it is believed that the actual prevalence is higher. The biggest predictor of CTE is the cumulative force of hits to the head over a lifetime, including during childhood. The AAP recommends avoiding tackle football until at least age 13 and avoiding hits during practice.
The actual prevalence, researchers said, may be much higher.