Head trauma in sport has been linked previously to an increased risk of developing dementia, although why wasn't know. Back in 2023, we spoke with the former rugby union international Alix Popham who was diagnosed with early-onset dementia as a result, it's suggested, of repeated head concussions. Alix hung up his boots in 2011 owing to a shoulder injury, but his dementia symptoms developed later… Alix - Yeah, I was most probably in denial. My short-term memory was terrible.