'Brain changes' seen in young American footballers

The researchers used accelerometers on players' helmets to measure
the impacts they experienced

Some teenagers appear to show changes in their brains after one season of playing American football, a small study suggests.

Even though players were not concussed during the season, researchers found abnormalities similar to the effects of mild traumatic brain injury.
Twenty-four players aged between 16 and 18 were studied and devices on their helmets measured head impacts.

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