How can sports affect your risk of Alzheimer’s?

We know now that if you play head banging sports, you have a greater chance of getting Parkinson’s, dementia, Alzheimer’s, ALS, etc. The brain damage and resulting inflammation amongst other problems can lead to these neurodegenerative diseases. We understand a good amount about head banging sports but there’s so much more we’ll find out about in the next 10 years.