Comment Re:Nice (Score 3, Informative) 169
Boxing has long been associated with a form of CTE called 'Dementia Pugilistica' (literally Boxer's Dementia), which manifests as Parkinsonism (and Dementia).
The etiology of 'Normal' Parkinsons and Dementia Pugilistica are almost certainly different, but at many stages they look similar enough that it's probably fair to say that boxing does essentially cause Parkinsons.